/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 EqDomain -i ../sv-benchmarks/c/psyco/psyco_abp_1-3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:38:03,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:38:03,011 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:38:03,042 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:38:03,043 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:38:03,045 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:38:03,048 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:38:03,050 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:38:03,051 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:38:03,055 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:38:03,057 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:38:03,058 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2023-04-01 10:38:03,088 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:38:03,089 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:38:03,089 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:38:03,090 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 10:38:03,113 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:38:03,113 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:38:03,113 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:38:03,113 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:38:03,114 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:38:03,114 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:38:03,114 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:38:03,114 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:38:03,114 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:38:03,114 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:38:03,115 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:38:03,115 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:38:03,115 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:38:03,115 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:38:03,115 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:38:03,115 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:38:03,115 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:38:03,115 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:38:03,116 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:38:03,116 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:38:03,116 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:38:03,116 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:38:03,117 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:38:03,118 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:38:03,118 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:38:03,119 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:38:03,119 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:38:03,119 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:38:03,120 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:38:03,120 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:38:03,120 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:38:03,120 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:38:03,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:38:03,120 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:38:03,120 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:38:03,121 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:38:03,121 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:38:03,121 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:38:03,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:38:03,122 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:38:03,122 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:38:03,122 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:38:03,331 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:38:03,353 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:38:03,355 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:38:03,356 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:38:03,357 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:38:03,357 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/psyco/psyco_abp_1-3.c [2023-04-01 10:38:04,477 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:38:04,644 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:38:04,644 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/psyco/psyco_abp_1-3.c [2023-04-01 10:38:04,653 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20357e61d/68f96555e6074725aa4e1f1b6bfae524/FLAGe45573978 [2023-04-01 10:38:04,665 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20357e61d/68f96555e6074725aa4e1f1b6bfae524 [2023-04-01 10:38:04,666 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:38:04,668 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:38:04,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:38:04,669 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:38:04,671 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:38:04,672 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:38:04" (1/1) ... [2023-04-01 10:38:04,672 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e0cb3e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:38:04, skipping insertion in model container [2023-04-01 10:38:04,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:38:04" (1/1) ... [2023-04-01 10:38:04,678 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:38:04,715 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:38:04,943 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/psyco/psyco_abp_1-3.c[24720,24733] [2023-04-01 10:38:04,961 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:38:04,973 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:38:05,034 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/psyco/psyco_abp_1-3.c[24720,24733] [2023-04-01 10:38:05,035 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:38:05,049 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:38:05,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:38:05 WrapperNode [2023-04-01 10:38:05,049 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:38:05,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:38:05,051 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:38:05,051 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:38:05,060 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:38:05" (1/1) ... [2023-04-01 10:38:05,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:38:05" (1/1) ... [2023-04-01 10:38:05,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:38:05" (1/1) ... [2023-04-01 10:38:05,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:38:05" (1/1) ... [2023-04-01 10:38:05,101 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:38:05" (1/1) ... [2023-04-01 10:38:05,107 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:38:05" (1/1) ... [2023-04-01 10:38:05,115 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:38:05" (1/1) ... [2023-04-01 10:38:05,118 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:38:05" (1/1) ... [2023-04-01 10:38:05,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:38:05,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:38:05,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:38:05,123 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:38:05,123 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:38:05" (1/1) ... [2023-04-01 10:38:05,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:38:05,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:38:05,153 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 10:38:05,165 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 10:38:05,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:38:05,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:38:05,192 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:38:05,192 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:38:05,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:38:05,193 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:38:05,193 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:38:05,194 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:38:05,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:38:05,194 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:38:05,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:38:05,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:38:05,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:38:05,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:38:05,194 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:38:05,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:38:05,291 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:38:05,293 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:38:05,879 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:38:05,891 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:38:05,891 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 10:38:05,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:38:05 BoogieIcfgContainer [2023-04-01 10:38:05,893 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:38:05,895 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:38:05,895 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:38:05,898 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:38:05,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:38:04" (1/3) ... [2023-04-01 10:38:05,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50ccb290 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:38:05, skipping insertion in model container [2023-04-01 10:38:05,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:38:05" (2/3) ... [2023-04-01 10:38:05,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50ccb290 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:38:05, skipping insertion in model container [2023-04-01 10:38:05,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:38:05" (3/3) ... [2023-04-01 10:38:05,900 INFO L112 eAbstractionObserver]: Analyzing ICFG psyco_abp_1-3.c [2023-04-01 10:38:05,913 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:38:05,914 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:38:05,954 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:38:05,959 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;@44a1257a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:38:05,959 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:38:05,963 INFO L276 IsEmpty]: Start isEmpty. Operand has 113 states, 107 states have (on average 1.9532710280373833) internal successors, (209), 108 states have internal predecessors, (209), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:38:05,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-01 10:38:05,969 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:38:05,969 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:38:05,970 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:38:05,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:38:05,974 INFO L85 PathProgramCache]: Analyzing trace with hash 861956158, now seen corresponding path program 1 times [2023-04-01 10:38:05,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:38:05,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768478677] [2023-04-01 10:38:05,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:38:05,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:38:06,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:38:06,116 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 10:38:06,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:38:06,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768478677] [2023-04-01 10:38:06,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768478677] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:38:06,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:38:06,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 10:38:06,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058011710] [2023-04-01 10:38:06,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:38:06,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 10:38:06,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:38:06,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 10:38:06,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 10:38:06,155 INFO L87 Difference]: Start difference. First operand has 113 states, 107 states have (on average 1.9532710280373833) internal successors, (209), 108 states have internal predecessors, (209), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:38:06,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:38:06,196 INFO L93 Difference]: Finished difference Result 221 states and 421 transitions. [2023-04-01 10:38:06,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 10:38:06,198 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 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 10:38:06,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:38:06,205 INFO L225 Difference]: With dead ends: 221 [2023-04-01 10:38:06,205 INFO L226 Difference]: Without dead ends: 103 [2023-04-01 10:38:06,208 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 10:38:06,210 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:38:06,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 202 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 10:38:06,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-04-01 10:38:06,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2023-04-01 10:38:06,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 99 states have (on average 1.6666666666666667) internal successors, (165), 99 states have internal predecessors, (165), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:38:06,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 168 transitions. [2023-04-01 10:38:06,244 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 168 transitions. Word has length 12 [2023-04-01 10:38:06,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:38:06,245 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 168 transitions. [2023-04-01 10:38:06,245 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:38:06,245 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 168 transitions. [2023-04-01 10:38:06,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-01 10:38:06,246 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:38:06,246 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:38:06,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:38:06,247 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:38:06,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:38:06,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1483324643, now seen corresponding path program 1 times [2023-04-01 10:38:06,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:38:06,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257491591] [2023-04-01 10:38:06,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:38:06,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:38:06,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:38:06,369 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 10:38:06,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:38:06,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257491591] [2023-04-01 10:38:06,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257491591] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:38:06,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:38:06,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:38:06,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928798561] [2023-04-01 10:38:06,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:38:06,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:38:06,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:38:06,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:38:06,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:38:06,374 INFO L87 Difference]: Start difference. First operand 103 states and 168 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:38:06,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:38:06,438 INFO L93 Difference]: Finished difference Result 204 states and 335 transitions. [2023-04-01 10:38:06,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:38:06,439 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-04-01 10:38:06,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:38:06,440 INFO L225 Difference]: With dead ends: 204 [2023-04-01 10:38:06,441 INFO L226 Difference]: Without dead ends: 106 [2023-04-01 10:38:06,441 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 10:38:06,443 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 4 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:38:06,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 312 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 10:38:06,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-04-01 10:38:06,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2023-04-01 10:38:06,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 102 states have (on average 1.6470588235294117) internal successors, (168), 102 states have internal predecessors, (168), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:38:06,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 171 transitions. [2023-04-01 10:38:06,459 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 171 transitions. Word has length 13 [2023-04-01 10:38:06,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:38:06,463 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 171 transitions. [2023-04-01 10:38:06,463 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:38:06,466 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 171 transitions. [2023-04-01 10:38:06,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 10:38:06,467 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:38:06,467 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:38:06,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:38:06,467 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:38:06,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:38:06,468 INFO L85 PathProgramCache]: Analyzing trace with hash 976712705, now seen corresponding path program 1 times [2023-04-01 10:38:06,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:38:06,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074974064] [2023-04-01 10:38:06,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:38:06,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:38:06,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:38:06,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:38:06,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:38:06,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074974064] [2023-04-01 10:38:06,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074974064] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:38:06,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:38:06,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 10:38:06,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327259300] [2023-04-01 10:38:06,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:38:06,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 10:38:06,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:38:06,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 10:38:06,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 10:38:06,969 INFO L87 Difference]: Start difference. First operand 106 states and 171 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:38:07,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:38:07,201 INFO L93 Difference]: Finished difference Result 208 states and 337 transitions. [2023-04-01 10:38:07,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:38:07,201 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-04-01 10:38:07,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:38:07,208 INFO L225 Difference]: With dead ends: 208 [2023-04-01 10:38:07,208 INFO L226 Difference]: Without dead ends: 189 [2023-04-01 10:38:07,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 10:38:07,210 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 140 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 10:38:07,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 379 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 10:38:07,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-04-01 10:38:07,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 175. [2023-04-01 10:38:07,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 171 states have (on average 1.6432748538011697) internal successors, (281), 171 states have internal predecessors, (281), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:38:07,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 284 transitions. [2023-04-01 10:38:07,230 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 284 transitions. Word has length 18 [2023-04-01 10:38:07,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:38:07,230 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 284 transitions. [2023-04-01 10:38:07,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:38:07,230 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 284 transitions. [2023-04-01 10:38:07,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 10:38:07,231 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:38:07,231 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:38:07,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:38:07,232 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:38:07,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:38:07,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1330397216, now seen corresponding path program 1 times [2023-04-01 10:38:07,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:38:07,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721668299] [2023-04-01 10:38:07,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:38:07,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:38:07,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:38:07,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:38:07,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:38:07,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721668299] [2023-04-01 10:38:07,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721668299] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:38:07,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:38:07,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:38:07,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084776334] [2023-04-01 10:38:07,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:38:07,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:38:07,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:38:07,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:38:07,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:38:07,271 INFO L87 Difference]: Start difference. First operand 175 states and 284 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:38:07,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:38:07,295 INFO L93 Difference]: Finished difference Result 296 states and 480 transitions. [2023-04-01 10:38:07,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:38:07,296 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-04-01 10:38:07,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:38:07,297 INFO L225 Difference]: With dead ends: 296 [2023-04-01 10:38:07,297 INFO L226 Difference]: Without dead ends: 127 [2023-04-01 10:38:07,301 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 10:38:07,310 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 30 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:38:07,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 287 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 10:38:07,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-04-01 10:38:07,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2023-04-01 10:38:07,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 121 states have (on average 1.603305785123967) internal successors, (194), 121 states have internal predecessors, (194), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:38:07,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 197 transitions. [2023-04-01 10:38:07,325 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 197 transitions. Word has length 19 [2023-04-01 10:38:07,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:38:07,326 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 197 transitions. [2023-04-01 10:38:07,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:38:07,326 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 197 transitions. [2023-04-01 10:38:07,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 10:38:07,327 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:38:07,327 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:38:07,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 10:38:07,327 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:38:07,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:38:07,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1279696508, now seen corresponding path program 1 times [2023-04-01 10:38:07,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:38:07,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481267083] [2023-04-01 10:38:07,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:38:07,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:38:07,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:38:07,398 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 10:38:07,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:38:07,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481267083] [2023-04-01 10:38:07,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481267083] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:38:07,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:38:07,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:38:07,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505952032] [2023-04-01 10:38:07,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:38:07,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:38:07,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:38:07,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:38:07,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:38:07,401 INFO L87 Difference]: Start difference. First operand 125 states and 197 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:38:07,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:38:07,428 INFO L93 Difference]: Finished difference Result 251 states and 398 transitions. [2023-04-01 10:38:07,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:38:07,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-04-01 10:38:07,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:38:07,429 INFO L225 Difference]: With dead ends: 251 [2023-04-01 10:38:07,430 INFO L226 Difference]: Without dead ends: 132 [2023-04-01 10:38:07,430 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 10:38:07,433 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 32 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:38:07,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 286 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 10:38:07,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-04-01 10:38:07,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2023-04-01 10:38:07,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 126 states have (on average 1.5793650793650793) internal successors, (199), 126 states have internal predecessors, (199), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:38:07,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 202 transitions. [2023-04-01 10:38:07,442 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 202 transitions. Word has length 24 [2023-04-01 10:38:07,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:38:07,442 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 202 transitions. [2023-04-01 10:38:07,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:38:07,442 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 202 transitions. [2023-04-01 10:38:07,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 10:38:07,443 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:38:07,443 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:38:07,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 10:38:07,443 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:38:07,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:38:07,444 INFO L85 PathProgramCache]: Analyzing trace with hash 683289573, now seen corresponding path program 1 times [2023-04-01 10:38:07,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:38:07,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035695124] [2023-04-01 10:38:07,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:38:07,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:38:07,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:38:07,671 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:38:07,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:38:07,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035695124] [2023-04-01 10:38:07,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035695124] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:38:07,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680969964] [2023-04-01 10:38:07,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:38:07,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:38:07,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:38:07,677 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 10:38:07,685 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 10:38:07,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:38:07,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 10:38:07,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:38:07,834 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:38:07,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:38:07,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:38:07,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680969964] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:38:07,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2084994052] [2023-04-01 10:38:07,990 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 10:38:07,991 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:38:07,994 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:38:07,999 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:38:08,000 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:38:08,186 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 61 for LOIs [2023-04-01 10:38:09,770 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 14 [2023-04-01 10:38:09,990 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 28 for LOIs [2023-04-01 10:38:10,003 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 10:38:12,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2084994052] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:38:12,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 10:38:12,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [6, 5, 5] total 27 [2023-04-01 10:38:12,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452435296] [2023-04-01 10:38:12,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:38:12,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 10:38:12,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:38:12,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 10:38:12,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2023-04-01 10:38:12,849 INFO L87 Difference]: Start difference. First operand 130 states and 202 transitions. Second operand has 17 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:38:15,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:38:15,876 INFO L93 Difference]: Finished difference Result 177 states and 267 transitions. [2023-04-01 10:38:15,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 10:38:15,877 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2023-04-01 10:38:15,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:38:15,878 INFO L225 Difference]: With dead ends: 177 [2023-04-01 10:38:15,878 INFO L226 Difference]: Without dead ends: 172 [2023-04-01 10:38:15,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=305, Invalid=1177, Unknown=0, NotChecked=0, Total=1482 [2023-04-01 10:38:15,880 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 591 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:38:15,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [591 Valid, 10 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1240 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 10:38:15,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-04-01 10:38:15,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 148. [2023-04-01 10:38:15,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 144 states have (on average 1.5625) internal successors, (225), 144 states have internal predecessors, (225), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:38:15,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 228 transitions. [2023-04-01 10:38:15,894 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 228 transitions. Word has length 26 [2023-04-01 10:38:15,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:38:15,895 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 228 transitions. [2023-04-01 10:38:15,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:38:15,895 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 228 transitions. [2023-04-01 10:38:15,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 10:38:15,895 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:38:15,896 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:38:15,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 10:38:16,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-04-01 10:38:16,102 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:38:16,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:38:16,102 INFO L85 PathProgramCache]: Analyzing trace with hash -496731033, now seen corresponding path program 1 times [2023-04-01 10:38:16,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:38:16,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559627427] [2023-04-01 10:38:16,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:38:16,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:38:16,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:38:16,366 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:38:16,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:38:16,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559627427] [2023-04-01 10:38:16,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559627427] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:38:16,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642558651] [2023-04-01 10:38:16,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:38:16,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:38:16,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:38:16,368 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 10:38:16,371 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 10:38:16,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:38:16,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 10:38:16,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:38:16,495 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 10:38:16,495 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:38:16,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642558651] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:38:16,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:38:16,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 10:38:16,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389992220] [2023-04-01 10:38:16,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:38:16,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:38:16,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:38:16,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:38:16,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 10:38:16,497 INFO L87 Difference]: Start difference. First operand 148 states and 228 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:38:16,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:38:16,512 INFO L93 Difference]: Finished difference Result 151 states and 230 transitions. [2023-04-01 10:38:16,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:38:16,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2023-04-01 10:38:16,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:38:16,514 INFO L225 Difference]: With dead ends: 151 [2023-04-01 10:38:16,514 INFO L226 Difference]: Without dead ends: 144 [2023-04-01 10:38:16,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 10:38:16,515 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 147 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:38:16,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 169 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 10:38:16,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-04-01 10:38:16,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2023-04-01 10:38:16,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 139 states have (on average 1.539568345323741) internal successors, (214), 139 states have internal predecessors, (214), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:38:16,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 217 transitions. [2023-04-01 10:38:16,526 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 217 transitions. Word has length 30 [2023-04-01 10:38:16,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:38:16,526 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 217 transitions. [2023-04-01 10:38:16,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:38:16,526 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 217 transitions. [2023-04-01 10:38:16,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 10:38:16,527 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:38:16,527 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:38:16,544 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 10:38:16,733 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,SelfDestructingSolverStorable6 [2023-04-01 10:38:16,734 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:38:16,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:38:16,734 INFO L85 PathProgramCache]: Analyzing trace with hash 32777437, now seen corresponding path program 1 times [2023-04-01 10:38:16,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:38:16,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714495413] [2023-04-01 10:38:16,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:38:16,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:38:16,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:38:16,788 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 10:38:16,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:38:16,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714495413] [2023-04-01 10:38:16,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714495413] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:38:16,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:38:16,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:38:16,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807036299] [2023-04-01 10:38:16,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:38:16,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:38:16,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:38:16,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:38:16,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:38:16,790 INFO L87 Difference]: Start difference. First operand 143 states and 217 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:38:16,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:38:16,821 INFO L93 Difference]: Finished difference Result 266 states and 403 transitions. [2023-04-01 10:38:16,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:38:16,821 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 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 10:38:16,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:38:16,822 INFO L225 Difference]: With dead ends: 266 [2023-04-01 10:38:16,822 INFO L226 Difference]: Without dead ends: 129 [2023-04-01 10:38:16,823 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 10:38:16,823 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 61 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:38:16,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 188 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 10:38:16,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-04-01 10:38:16,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2023-04-01 10:38:16,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 123 states have (on average 1.4959349593495934) internal successors, (184), 123 states have internal predecessors, (184), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:38:16,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 187 transitions. [2023-04-01 10:38:16,833 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 187 transitions. Word has length 33 [2023-04-01 10:38:16,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:38:16,833 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 187 transitions. [2023-04-01 10:38:16,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:38:16,833 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 187 transitions. [2023-04-01 10:38:16,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 10:38:16,834 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:38:16,834 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:38:16,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 10:38:16,835 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:38:16,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:38:16,835 INFO L85 PathProgramCache]: Analyzing trace with hash 987426212, now seen corresponding path program 1 times [2023-04-01 10:38:16,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:38:16,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023983397] [2023-04-01 10:38:16,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:38:16,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:38:16,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:38:16,963 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 10:38:16,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:38:16,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023983397] [2023-04-01 10:38:16,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023983397] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:38:16,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679245574] [2023-04-01 10:38:16,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:38:16,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:38:16,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:38:16,969 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 10:38:17,000 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 10:38:17,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:38:17,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-01 10:38:17,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:38:17,147 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:38:17,147 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:38:17,277 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 10:38:17,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679245574] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:38:17,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1679409817] [2023-04-01 10:38:17,279 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-04-01 10:38:17,279 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:38:17,280 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:38:17,280 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:38:17,280 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:38:17,350 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 61 for LOIs [2023-04-01 10:38:19,270 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-01 10:38:19,571 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-01 10:38:19,708 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-01 10:38:19,845 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 28 for LOIs [2023-04-01 10:38:19,854 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 10:38:23,862 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3704#(and (= main_~method_id~0 2) (= (select |#length| 3) 12) (= 6 ~m_recv_ack_1_1~0) (not (= 2 main_~this_expect~0)) (= 2 ~m_msg_2~0) (= ~m_msg_1_1~0 4) (= 7 ~m_recv_ack_1_2~0) (not (= main_~this_expect~0 12)) (= 16 (select |#length| 2)) (not (= main_~this_expect~0 4)) (= ~m_msg_1_2~0 5) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (not (= 16 main_~this_expect~0)) (= ~m_Protocol~0 1) (= (mod main_~P1~0 2) 0) (not (= 6 main_~this_expect~0)) (not (= |#StackHeapBarrier| 0)) (= (mod main_~this_expect~0 2) 0) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= 3 ~m_recv_ack_2~0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= main_~q~0 4) (= (select (select |#memory_int| 1) 1) 0) (= (mod main_~this_buffer_empty~0 4294967296) 1) (not (= 48 main_~this_expect~0)) (= |#NULL.base| 0))' at error location [2023-04-01 10:38:23,862 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 10:38:23,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 10:38:23,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 12 [2023-04-01 10:38:23,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333001481] [2023-04-01 10:38:23,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 10:38:23,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 10:38:23,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:38:23,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 10:38:23,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=996, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 10:38:23,864 INFO L87 Difference]: Start difference. First operand 127 states and 187 transitions. Second operand has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 12 states have internal predecessors, (82), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:38:24,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:38:24,478 INFO L93 Difference]: Finished difference Result 275 states and 394 transitions. [2023-04-01 10:38:24,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 10:38:24,482 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 12 states have internal predecessors, (82), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2023-04-01 10:38:24,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:38:24,485 INFO L225 Difference]: With dead ends: 275 [2023-04-01 10:38:24,485 INFO L226 Difference]: Without dead ends: 264 [2023-04-01 10:38:24,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=342, Invalid=1914, Unknown=0, NotChecked=0, Total=2256 [2023-04-01 10:38:24,488 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 631 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 10:38:24,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [631 Valid, 594 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 10:38:24,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2023-04-01 10:38:24,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 208. [2023-04-01 10:38:24,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 204 states have (on average 1.5245098039215685) internal successors, (311), 204 states have internal predecessors, (311), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:38:24,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 314 transitions. [2023-04-01 10:38:24,509 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 314 transitions. Word has length 36 [2023-04-01 10:38:24,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:38:24,511 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 314 transitions. [2023-04-01 10:38:24,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 12 states have internal predecessors, (82), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:38:24,512 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 314 transitions. [2023-04-01 10:38:24,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-01 10:38:24,513 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:38:24,514 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:38:24,523 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 10:38:24,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:38:24,723 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:38:24,724 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:38:24,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1683281554, now seen corresponding path program 1 times [2023-04-01 10:38:24,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:38:24,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435862237] [2023-04-01 10:38:24,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:38:24,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:38:24,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:38:24,769 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 10:38:24,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:38:24,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435862237] [2023-04-01 10:38:24,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435862237] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:38:24,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:38:24,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:38:24,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111470650] [2023-04-01 10:38:24,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:38:24,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:38:24,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:38:24,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:38:24,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:38:24,771 INFO L87 Difference]: Start difference. First operand 208 states and 314 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:38:24,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:38:24,804 INFO L93 Difference]: Finished difference Result 355 states and 535 transitions. [2023-04-01 10:38:24,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:38:24,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2023-04-01 10:38:24,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:38:24,806 INFO L225 Difference]: With dead ends: 355 [2023-04-01 10:38:24,806 INFO L226 Difference]: Without dead ends: 192 [2023-04-01 10:38:24,807 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 10:38:24,807 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 28 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:38:24,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 216 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 10:38:24,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-04-01 10:38:24,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2023-04-01 10:38:24,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 186 states have (on average 1.4731182795698925) internal successors, (274), 186 states have internal predecessors, (274), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:38:24,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 277 transitions. [2023-04-01 10:38:24,823 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 277 transitions. Word has length 40 [2023-04-01 10:38:24,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:38:24,823 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 277 transitions. [2023-04-01 10:38:24,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:38:24,823 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 277 transitions. [2023-04-01 10:38:24,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-01 10:38:24,824 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:38:24,824 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:38:24,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 10:38:24,825 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:38:24,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:38:24,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1958878163, now seen corresponding path program 1 times [2023-04-01 10:38:24,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:38:24,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966427989] [2023-04-01 10:38:24,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:38:24,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:38:24,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:38:24,879 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-04-01 10:38:24,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:38:24,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966427989] [2023-04-01 10:38:24,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966427989] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:38:24,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:38:24,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:38:24,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334570970] [2023-04-01 10:38:24,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:38:24,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:38:24,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:38:24,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:38:24,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:38:24,881 INFO L87 Difference]: Start difference. First operand 190 states and 277 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:38:24,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:38:24,911 INFO L93 Difference]: Finished difference Result 279 states and 409 transitions. [2023-04-01 10:38:24,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:38:24,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2023-04-01 10:38:24,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:38:24,913 INFO L225 Difference]: With dead ends: 279 [2023-04-01 10:38:24,913 INFO L226 Difference]: Without dead ends: 173 [2023-04-01 10:38:24,914 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 10:38:24,914 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 31 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:38:24,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 212 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 10:38:24,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-04-01 10:38:24,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2023-04-01 10:38:24,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 167 states have (on average 1.4550898203592815) internal successors, (243), 167 states have internal predecessors, (243), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:38:24,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 246 transitions. [2023-04-01 10:38:24,930 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 246 transitions. Word has length 49 [2023-04-01 10:38:24,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:38:24,931 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 246 transitions. [2023-04-01 10:38:24,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:38:24,931 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 246 transitions. [2023-04-01 10:38:24,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-01 10:38:24,932 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:38:24,932 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:38:24,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 10:38:24,932 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:38:24,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:38:24,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1549477649, now seen corresponding path program 1 times [2023-04-01 10:38:24,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:38:24,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854519269] [2023-04-01 10:38:24,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:38:24,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:38:24,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:38:25,099 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 10:38:25,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:38:25,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854519269] [2023-04-01 10:38:25,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854519269] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:38:25,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264744401] [2023-04-01 10:38:25,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:38:25,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:38:25,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:38:25,102 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 10:38:25,104 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 10:38:25,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:38:25,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-01 10:38:25,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:38:25,301 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:38:25,301 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:38:25,501 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 10:38:25,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264744401] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:38:25,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [315662810] [2023-04-01 10:38:25,504 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2023-04-01 10:38:25,504 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:38:25,505 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:38:25,505 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:38:25,505 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:38:25,561 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 61 for LOIs [2023-04-01 10:38:26,355 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 11 [2023-04-01 10:38:27,944 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 10:38:28,278 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 10:38:28,577 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 10:38:28,643 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 10:38:28,814 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 28 for LOIs [2023-04-01 10:38:28,823 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 10:38:34,527 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5695#(and (= (select |#length| 3) 12) (= 5 main_~q~0) (= 6 ~m_recv_ack_1_1~0) (= 2 ~m_msg_2~0) (= main_~P3~0 0) (= ~m_msg_1_1~0 4) (= 7 ~m_recv_ack_1_2~0) (= 16 (select |#length| 2)) (= ~m_msg_1_2~0 5) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= ~m_Protocol~0 1) (not (= 5 main_~this_expect~0)) (= main_~P1~0 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (not (= (mod main_~this_buffer_empty~0 4294967296) 1)) (not (= 7 main_~this_expect~0)) (= (select |#valid| 0) 0) (= 3 ~m_recv_ack_2~0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= main_~method_id~0 3) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= (mod (+ main_~this_expect~0 1) 2) 0) (= |#NULL.base| 0) (not (= 3 main_~this_expect~0)))' at error location [2023-04-01 10:38:34,527 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 10:38:34,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 10:38:34,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 15 [2023-04-01 10:38:34,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756992441] [2023-04-01 10:38:34,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 10:38:34,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 10:38:34,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:38:34,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 10:38:34,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1811, Unknown=0, NotChecked=0, Total=2070 [2023-04-01 10:38:34,529 INFO L87 Difference]: Start difference. First operand 171 states and 246 transitions. Second operand has 15 states, 15 states have (on average 8.0) internal successors, (120), 15 states have internal predecessors, (120), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:38:34,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:38:34,778 INFO L93 Difference]: Finished difference Result 206 states and 287 transitions. [2023-04-01 10:38:34,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 10:38:34,778 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 8.0) internal successors, (120), 15 states have internal predecessors, (120), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2023-04-01 10:38:34,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:38:34,780 INFO L225 Difference]: With dead ends: 206 [2023-04-01 10:38:34,780 INFO L226 Difference]: Without dead ends: 192 [2023-04-01 10:38:34,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 111 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=301, Invalid=2249, Unknown=0, NotChecked=0, Total=2550 [2023-04-01 10:38:34,781 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 346 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:38:34,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 854 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 10:38:34,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-04-01 10:38:34,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 181. [2023-04-01 10:38:34,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 177 states have (on average 1.4180790960451977) internal successors, (251), 177 states have internal predecessors, (251), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:38:34,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 254 transitions. [2023-04-01 10:38:34,796 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 254 transitions. Word has length 50 [2023-04-01 10:38:34,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:38:34,796 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 254 transitions. [2023-04-01 10:38:34,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.0) internal successors, (120), 15 states have internal predecessors, (120), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:38:34,797 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 254 transitions. [2023-04-01 10:38:34,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-04-01 10:38:34,797 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:38:34,797 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:38:34,802 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 10:38:35,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:38:35,001 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:38:35,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:38:35,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1723435239, now seen corresponding path program 1 times [2023-04-01 10:38:35,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:38:35,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588113325] [2023-04-01 10:38:35,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:38:35,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:38:35,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:38:35,469 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 10:38:35,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:38:35,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588113325] [2023-04-01 10:38:35,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588113325] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:38:35,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864571430] [2023-04-01 10:38:35,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:38:35,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:38:35,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:38:35,471 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 10:38:35,498 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 10:38:35,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:38:35,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-01 10:38:35,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:38:35,738 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:38:35,738 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:38:35,971 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 50 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 10:38:35,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864571430] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:38:35,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [693209293] [2023-04-01 10:38:35,973 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2023-04-01 10:38:35,973 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:38:35,974 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:38:35,974 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:38:35,974 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:38:36,020 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 61 for LOIs [2023-04-01 10:38:36,877 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 11 [2023-04-01 10:38:45,577 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 10:38:46,345 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2023-04-01 10:38:46,600 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2023-04-01 10:38:46,808 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2023-04-01 10:38:46,889 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-01 10:38:46,937 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 28 for LOIs [2023-04-01 10:38:46,943 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 10:38:52,502 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6596#(and (= (select |#length| 3) 12) (= 6 ~m_recv_ack_1_1~0) (= 2 ~m_msg_2~0) (= ~m_msg_1_1~0 4) (= 7 ~m_recv_ack_1_2~0) (= 16 (select |#length| 2)) (= ~m_msg_1_2~0 5) (= 2 (select |#length| 1)) (= main_~q~0 3) (= (select |#valid| 3) 1) (= ~m_Protocol~0 1) (= main_~P1~0 0) (or (and (= main_~P3~0 0) (= (mod main_~this_buffer_empty~0 4294967296) 1)) (and (= main_~P3~0 0) (not (= (mod (+ main_~this_expect~0 1) 2) 0)))) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= 3 ~m_recv_ack_2~0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= main_~method_id~0 3) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 10:38:52,502 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 10:38:52,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 10:38:52,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 17 [2023-04-01 10:38:52,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316786387] [2023-04-01 10:38:52,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 10:38:52,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 10:38:52,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:38:52,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 10:38:52,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=2085, Unknown=0, NotChecked=0, Total=2352 [2023-04-01 10:38:52,507 INFO L87 Difference]: Start difference. First operand 181 states and 254 transitions. Second operand has 17 states, 17 states have (on average 9.529411764705882) internal successors, (162), 17 states have internal predecessors, (162), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:38:52,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:38:52,576 INFO L93 Difference]: Finished difference Result 200 states and 282 transitions. [2023-04-01 10:38:52,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 10:38:52,576 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 9.529411764705882) internal successors, (162), 17 states have internal predecessors, (162), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2023-04-01 10:38:52,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:38:52,577 INFO L225 Difference]: With dead ends: 200 [2023-04-01 10:38:52,577 INFO L226 Difference]: Without dead ends: 0 [2023-04-01 10:38:52,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 163 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=267, Invalid=2085, Unknown=0, NotChecked=0, Total=2352 [2023-04-01 10:38:52,578 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 392 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:38:52,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 1009 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 10:38:52,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-04-01 10:38:52,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-04-01 10:38:52,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-04-01 10:38:52,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-04-01 10:38:52,579 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 69 [2023-04-01 10:38:52,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:38:52,579 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-04-01 10:38:52,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 9.529411764705882) internal successors, (162), 17 states have internal predecessors, (162), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:38:52,579 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-04-01 10:38:52,580 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-04-01 10:38:52,582 INFO L805 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 10:38:52,589 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 10:38:52,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 10:38:52,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-04-01 10:38:54,231 INFO L899 garLoopResultBuilder]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2023-04-01 10:38:54,231 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line 4) no Hoare annotation was computed. [2023-04-01 10:38:54,231 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: (and (= |old(~m_recv_ack_1_1~0)| ~m_recv_ack_1_1~0) (= |old(~m_recv_ack_2~0)| ~m_recv_ack_2~0) (= |old(~m_msg_2~0)| ~m_msg_2~0) (= ~m_Protocol~0 |old(~m_Protocol~0)|) (= ~m_msg_1_1~0 |old(~m_msg_1_1~0)|) (= ~m_msg_1_2~0 |old(~m_msg_1_2~0)|) (= |old(~m_recv_ack_1_2~0)| ~m_recv_ack_1_2~0) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2023-04-01 10:38:54,231 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2023-04-01 10:38:54,231 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-04-01 10:38:54,232 INFO L895 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (and (= (select |#length| 3) 12) (= 6 ~m_recv_ack_1_1~0) (= 2 ~m_msg_2~0) (= ~m_msg_1_1~0 4) (= 7 ~m_recv_ack_1_2~0) (= 16 (select |#length| 2)) (= ~m_msg_1_2~0 5) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= ~m_Protocol~0 1) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= 3 ~m_recv_ack_2~0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select .cse0 0) 48) (= (select .cse0 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2023-04-01 10:38:54,232 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-04-01 10:38:54,232 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-04-01 10:38:54,232 INFO L899 garLoopResultBuilder]: For program point mainEXIT(lines 16 568) no Hoare annotation was computed. [2023-04-01 10:38:54,232 INFO L899 garLoopResultBuilder]: For program point L432(lines 432 434) no Hoare annotation was computed. [2023-04-01 10:38:54,232 INFO L899 garLoopResultBuilder]: For program point L300(lines 300 302) no Hoare annotation was computed. [2023-04-01 10:38:54,232 INFO L899 garLoopResultBuilder]: For program point L168(lines 168 170) no Hoare annotation was computed. [2023-04-01 10:38:54,232 INFO L899 garLoopResultBuilder]: For program point L532(lines 532 534) no Hoare annotation was computed. [2023-04-01 10:38:54,232 INFO L899 garLoopResultBuilder]: For program point L400(lines 400 402) no Hoare annotation was computed. [2023-04-01 10:38:54,232 INFO L899 garLoopResultBuilder]: For program point L268(lines 268 270) no Hoare annotation was computed. [2023-04-01 10:38:54,232 INFO L899 garLoopResultBuilder]: For program point L500(lines 500 502) no Hoare annotation was computed. [2023-04-01 10:38:54,233 INFO L899 garLoopResultBuilder]: For program point L368(lines 368 370) no Hoare annotation was computed. [2023-04-01 10:38:54,233 INFO L899 garLoopResultBuilder]: For program point mainFINAL(lines 16 568) no Hoare annotation was computed. [2023-04-01 10:38:54,233 INFO L899 garLoopResultBuilder]: For program point L468(lines 468 470) no Hoare annotation was computed. [2023-04-01 10:38:54,233 INFO L899 garLoopResultBuilder]: For program point L41(lines 41 60) no Hoare annotation was computed. [2023-04-01 10:38:54,233 INFO L899 garLoopResultBuilder]: For program point L42(lines 42 57) no Hoare annotation was computed. [2023-04-01 10:38:54,233 INFO L899 garLoopResultBuilder]: For program point L142(lines 142 157) no Hoare annotation was computed. [2023-04-01 10:38:54,233 INFO L899 garLoopResultBuilder]: For program point L242(lines 242 257) no Hoare annotation was computed. [2023-04-01 10:38:54,233 INFO L899 garLoopResultBuilder]: For program point L110(lines 110 125) no Hoare annotation was computed. [2023-04-01 10:38:54,233 INFO L899 garLoopResultBuilder]: For program point L44(lines 44 55) no Hoare annotation was computed. [2023-04-01 10:38:54,233 INFO L899 garLoopResultBuilder]: For program point L342(lines 342 357) no Hoare annotation was computed. [2023-04-01 10:38:54,233 INFO L899 garLoopResultBuilder]: For program point L210(lines 210 225) no Hoare annotation was computed. [2023-04-01 10:38:54,233 INFO L899 garLoopResultBuilder]: For program point L144(lines 144 155) no Hoare annotation was computed. [2023-04-01 10:38:54,233 INFO L899 garLoopResultBuilder]: For program point L78(lines 78 93) no Hoare annotation was computed. [2023-04-01 10:38:54,234 INFO L899 garLoopResultBuilder]: For program point L442(lines 442 457) no Hoare annotation was computed. [2023-04-01 10:38:54,234 INFO L899 garLoopResultBuilder]: For program point L310(lines 310 325) no Hoare annotation was computed. [2023-04-01 10:38:54,234 INFO L899 garLoopResultBuilder]: For program point L244(lines 244 255) no Hoare annotation was computed. [2023-04-01 10:38:54,234 INFO L899 garLoopResultBuilder]: For program point L178(lines 178 193) no Hoare annotation was computed. [2023-04-01 10:38:54,234 INFO L899 garLoopResultBuilder]: For program point L112(lines 112 123) no Hoare annotation was computed. [2023-04-01 10:38:54,234 INFO L899 garLoopResultBuilder]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 567) no Hoare annotation was computed. [2023-04-01 10:38:54,234 INFO L899 garLoopResultBuilder]: For program point L542(lines 542 557) no Hoare annotation was computed. [2023-04-01 10:38:54,234 INFO L899 garLoopResultBuilder]: For program point L410(lines 410 425) no Hoare annotation was computed. [2023-04-01 10:38:54,234 INFO L899 garLoopResultBuilder]: For program point L344(lines 344 355) no Hoare annotation was computed. [2023-04-01 10:38:54,234 INFO L899 garLoopResultBuilder]: For program point L278(lines 278 293) no Hoare annotation was computed. [2023-04-01 10:38:54,234 INFO L899 garLoopResultBuilder]: For program point L212(lines 212 223) no Hoare annotation was computed. [2023-04-01 10:38:54,234 INFO L899 garLoopResultBuilder]: For program point L80(lines 80 91) no Hoare annotation was computed. [2023-04-01 10:38:54,235 INFO L899 garLoopResultBuilder]: For program point L510(lines 510 525) no Hoare annotation was computed. [2023-04-01 10:38:54,235 INFO L899 garLoopResultBuilder]: For program point L444(lines 444 455) no Hoare annotation was computed. [2023-04-01 10:38:54,235 INFO L899 garLoopResultBuilder]: For program point L378(lines 378 393) no Hoare annotation was computed. [2023-04-01 10:38:54,235 INFO L899 garLoopResultBuilder]: For program point L312(lines 312 323) no Hoare annotation was computed. [2023-04-01 10:38:54,235 INFO L899 garLoopResultBuilder]: For program point L180(lines 180 191) no Hoare annotation was computed. [2023-04-01 10:38:54,235 INFO L899 garLoopResultBuilder]: For program point L48(lines 48 50) no Hoare annotation was computed. [2023-04-01 10:38:54,235 INFO L899 garLoopResultBuilder]: For program point L544(lines 544 555) no Hoare annotation was computed. [2023-04-01 10:38:54,235 INFO L899 garLoopResultBuilder]: For program point L478(lines 478 493) no Hoare annotation was computed. [2023-04-01 10:38:54,235 INFO L895 garLoopResultBuilder]: At program point L544-2(lines 26 563) the Hoare annotation is: (let ((.cse1 (<= main_~this_buffer_empty~0 0)) (.cse2 (<= 0 main_~this_buffer_empty~0)) (.cse0 (select |#memory_int| 1)) (.cse3 (<= main_~this_expect~0 (* 2 (div main_~this_expect~0 2)))) (.cse6 (<= 1 main_~this_buffer_empty~0)) (.cse7 (<= main_~this_buffer_empty~0 1)) (.cse4 (<= 0 (+ main_~P8~0 2147483648))) (.cse5 (<= main_~P8~0 2147483647))) (or (not (= ~m_Protocol~0 1)) (not (= 3 ~m_recv_ack_2~0)) (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (and .cse1 .cse2 .cse3 (<= 5 main_~q~0) .cse4 .cse5) (not (= 2 (select |#length| 1))) (and .cse1 (= main_~q~0 3) .cse2 (<= main_~this_expect~0 (+ (* (div (+ (- 1) main_~this_expect~0) 2) 2) 1)) .cse4 .cse5) (not (= (select |#valid| 3) 1)) (not (= ~m_msg_1_1~0 4)) (not (= 2 ~m_msg_2~0)) (not (= 6 ~m_recv_ack_1_1~0)) (not (= 16 (select |#length| 2))) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (not (= 7 ~m_recv_ack_1_2~0)) (not (= |#NULL.base| 0)) (and (not (= (mod main_~this_expect~0 2) 0)) .cse6 .cse7 .cse4 (= main_~q~0 4) .cse5) (not (= (select |#valid| 2) 1)) (not (= ~m_msg_1_2~0 5)) (<= |#StackHeapBarrier| 0) (and .cse3 .cse6 .cse7 .cse4 (= main_~q~0 1) .cse5) (and (= main_~this_buffer_empty~0 0) (= main_~this_expect~0 0) (= main_~q~0 0)))) [2023-04-01 10:38:54,236 INFO L899 garLoopResultBuilder]: For program point L412(lines 412 423) no Hoare annotation was computed. [2023-04-01 10:38:54,236 INFO L899 garLoopResultBuilder]: For program point L280(lines 280 291) no Hoare annotation was computed. [2023-04-01 10:38:54,236 INFO L899 garLoopResultBuilder]: For program point L148(lines 148 150) no Hoare annotation was computed. [2023-04-01 10:38:54,236 INFO L899 garLoopResultBuilder]: For program point L512(lines 512 523) no Hoare annotation was computed. [2023-04-01 10:38:54,236 INFO L899 garLoopResultBuilder]: For program point L380(lines 380 391) no Hoare annotation was computed. [2023-04-01 10:38:54,236 INFO L899 garLoopResultBuilder]: For program point L248(lines 248 250) no Hoare annotation was computed. [2023-04-01 10:38:54,236 INFO L899 garLoopResultBuilder]: For program point L116(lines 116 118) no Hoare annotation was computed. [2023-04-01 10:38:54,236 INFO L899 garLoopResultBuilder]: For program point L480(lines 480 491) no Hoare annotation was computed. [2023-04-01 10:38:54,236 INFO L899 garLoopResultBuilder]: For program point L348(lines 348 350) no Hoare annotation was computed. [2023-04-01 10:38:54,236 INFO L899 garLoopResultBuilder]: For program point L216(lines 216 218) no Hoare annotation was computed. [2023-04-01 10:38:54,236 INFO L899 garLoopResultBuilder]: For program point L84(lines 84 86) no Hoare annotation was computed. [2023-04-01 10:38:54,237 INFO L895 garLoopResultBuilder]: At program point ERROR(lines 16 568) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (or (not (= ~m_Protocol~0 1)) (not (= 3 ~m_recv_ack_2~0)) (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (not (= (select |#valid| 3) 1)) (not (= ~m_msg_1_1~0 4)) (not (= 2 ~m_msg_2~0)) (not (= 6 ~m_recv_ack_1_1~0)) (not (= 16 (select |#length| 2))) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (not (= 7 ~m_recv_ack_1_2~0)) (not (= |#NULL.base| 0)) (not (= (select |#valid| 2) 1)) (not (= ~m_msg_1_2~0 5)) (<= |#StackHeapBarrier| 0))) [2023-04-01 10:38:54,237 INFO L899 garLoopResultBuilder]: For program point L448(lines 448 450) no Hoare annotation was computed. [2023-04-01 10:38:54,237 INFO L899 garLoopResultBuilder]: For program point L316(lines 316 318) no Hoare annotation was computed. [2023-04-01 10:38:54,237 INFO L899 garLoopResultBuilder]: For program point L184(lines 184 186) no Hoare annotation was computed. [2023-04-01 10:38:54,237 INFO L899 garLoopResultBuilder]: For program point L548(lines 548 550) no Hoare annotation was computed. [2023-04-01 10:38:54,237 INFO L899 garLoopResultBuilder]: For program point L416(lines 416 418) no Hoare annotation was computed. [2023-04-01 10:38:54,237 INFO L899 garLoopResultBuilder]: For program point L284(lines 284 286) no Hoare annotation was computed. [2023-04-01 10:38:54,237 INFO L899 garLoopResultBuilder]: For program point L516(lines 516 518) no Hoare annotation was computed. [2023-04-01 10:38:54,237 INFO L899 garLoopResultBuilder]: For program point L384(lines 384 386) no Hoare annotation was computed. [2023-04-01 10:38:54,237 INFO L899 garLoopResultBuilder]: For program point L484(lines 484 486) no Hoare annotation was computed. [2023-04-01 10:38:54,237 INFO L895 garLoopResultBuilder]: At program point L26-2(lines 26 563) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (or (not (= ~m_Protocol~0 1)) (not (= 3 ~m_recv_ack_2~0)) (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (and (<= main_~this_buffer_empty~0 0) (<= 0 main_~this_buffer_empty~0) (<= main_~this_expect~0 (* 2 (div main_~this_expect~0 2))) (<= 5 main_~q~0) (<= 0 (+ main_~P8~0 2147483648)) (<= main_~P8~0 2147483647)) (not (= 2 (select |#length| 1))) (not (= (select |#valid| 3) 1)) (not (= ~m_msg_1_1~0 4)) (not (= 2 ~m_msg_2~0)) (not (= 6 ~m_recv_ack_1_1~0)) (not (= 16 (select |#length| 2))) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (not (= 7 ~m_recv_ack_1_2~0)) (not (= |#NULL.base| 0)) (not (= (select |#valid| 2) 1)) (not (= ~m_msg_1_2~0 5)) (<= |#StackHeapBarrier| 0) (and (= main_~this_buffer_empty~0 0) (= main_~this_expect~0 0) (= main_~q~0 0)))) [2023-04-01 10:38:54,238 INFO L899 garLoopResultBuilder]: For program point L26-3(lines 26 563) no Hoare annotation was computed. [2023-04-01 10:38:54,238 INFO L899 garLoopResultBuilder]: For program point L126(lines 126 141) no Hoare annotation was computed. [2023-04-01 10:38:54,238 INFO L899 garLoopResultBuilder]: For program point L226(lines 226 241) no Hoare annotation was computed. [2023-04-01 10:38:54,238 INFO L899 garLoopResultBuilder]: For program point L94(lines 94 109) no Hoare annotation was computed. [2023-04-01 10:38:54,238 INFO L899 garLoopResultBuilder]: For program point L61(lines 61 160) no Hoare annotation was computed. [2023-04-01 10:38:54,238 INFO L899 garLoopResultBuilder]: For program point L326(lines 326 341) no Hoare annotation was computed. [2023-04-01 10:38:54,238 INFO L899 garLoopResultBuilder]: For program point L194(lines 194 209) no Hoare annotation was computed. [2023-04-01 10:38:54,238 INFO L899 garLoopResultBuilder]: For program point L161(lines 161 260) no Hoare annotation was computed. [2023-04-01 10:38:54,238 INFO L899 garLoopResultBuilder]: For program point L128(lines 128 139) no Hoare annotation was computed. [2023-04-01 10:38:54,238 INFO L899 garLoopResultBuilder]: For program point L62(lines 62 77) no Hoare annotation was computed. [2023-04-01 10:38:54,238 INFO L899 garLoopResultBuilder]: For program point L426(lines 426 441) no Hoare annotation was computed. [2023-04-01 10:38:54,238 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 16 568) the Hoare annotation is: true [2023-04-01 10:38:54,238 INFO L899 garLoopResultBuilder]: For program point L294(lines 294 309) no Hoare annotation was computed. [2023-04-01 10:38:54,239 INFO L899 garLoopResultBuilder]: For program point L261(lines 261 360) no Hoare annotation was computed. [2023-04-01 10:38:54,239 INFO L899 garLoopResultBuilder]: For program point L228(lines 228 239) no Hoare annotation was computed. [2023-04-01 10:38:54,239 INFO L899 garLoopResultBuilder]: For program point L162(lines 162 177) no Hoare annotation was computed. [2023-04-01 10:38:54,239 INFO L899 garLoopResultBuilder]: For program point L96(lines 96 107) no Hoare annotation was computed. [2023-04-01 10:38:54,239 INFO L899 garLoopResultBuilder]: For program point L526(lines 526 541) no Hoare annotation was computed. [2023-04-01 10:38:54,239 INFO L899 garLoopResultBuilder]: For program point L394(lines 394 409) no Hoare annotation was computed. [2023-04-01 10:38:54,239 INFO L899 garLoopResultBuilder]: For program point L361(lines 361 460) no Hoare annotation was computed. [2023-04-01 10:38:54,239 INFO L899 garLoopResultBuilder]: For program point L328(lines 328 339) no Hoare annotation was computed. [2023-04-01 10:38:54,239 INFO L899 garLoopResultBuilder]: For program point L262(lines 262 277) no Hoare annotation was computed. [2023-04-01 10:38:54,239 INFO L899 garLoopResultBuilder]: For program point L196(lines 196 207) no Hoare annotation was computed. [2023-04-01 10:38:54,239 INFO L899 garLoopResultBuilder]: For program point L64(lines 64 75) no Hoare annotation was computed. [2023-04-01 10:38:54,239 INFO L899 garLoopResultBuilder]: For program point L494(lines 494 509) no Hoare annotation was computed. [2023-04-01 10:38:54,239 INFO L899 garLoopResultBuilder]: For program point L461(lines 461 560) no Hoare annotation was computed. [2023-04-01 10:38:54,239 INFO L899 garLoopResultBuilder]: For program point L428(lines 428 439) no Hoare annotation was computed. [2023-04-01 10:38:54,240 INFO L899 garLoopResultBuilder]: For program point L362(lines 362 377) no Hoare annotation was computed. [2023-04-01 10:38:54,240 INFO L899 garLoopResultBuilder]: For program point L296(lines 296 307) no Hoare annotation was computed. [2023-04-01 10:38:54,240 INFO L899 garLoopResultBuilder]: For program point L164(lines 164 175) no Hoare annotation was computed. [2023-04-01 10:38:54,240 INFO L899 garLoopResultBuilder]: For program point L528(lines 528 539) no Hoare annotation was computed. [2023-04-01 10:38:54,240 INFO L899 garLoopResultBuilder]: For program point L462(lines 462 477) no Hoare annotation was computed. [2023-04-01 10:38:54,240 INFO L899 garLoopResultBuilder]: For program point L396(lines 396 407) no Hoare annotation was computed. [2023-04-01 10:38:54,240 INFO L899 garLoopResultBuilder]: For program point L264(lines 264 275) no Hoare annotation was computed. [2023-04-01 10:38:54,240 INFO L899 garLoopResultBuilder]: For program point L132(lines 132 134) no Hoare annotation was computed. [2023-04-01 10:38:54,240 INFO L899 garLoopResultBuilder]: For program point L496(lines 496 507) no Hoare annotation was computed. [2023-04-01 10:38:54,240 INFO L899 garLoopResultBuilder]: For program point L364(lines 364 375) no Hoare annotation was computed. [2023-04-01 10:38:54,240 INFO L899 garLoopResultBuilder]: For program point L232(lines 232 234) no Hoare annotation was computed. [2023-04-01 10:38:54,240 INFO L899 garLoopResultBuilder]: For program point L100(lines 100 102) no Hoare annotation was computed. [2023-04-01 10:38:54,240 INFO L899 garLoopResultBuilder]: For program point L464(lines 464 475) no Hoare annotation was computed. [2023-04-01 10:38:54,240 INFO L899 garLoopResultBuilder]: For program point L332(lines 332 334) no Hoare annotation was computed. [2023-04-01 10:38:54,241 INFO L899 garLoopResultBuilder]: For program point L200(lines 200 202) no Hoare annotation was computed. [2023-04-01 10:38:54,241 INFO L899 garLoopResultBuilder]: For program point L68(lines 68 70) no Hoare annotation was computed. [2023-04-01 10:38:54,243 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:38:54,245 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-01 10:38:54,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.04 10:38:54 BoogieIcfgContainer [2023-04-01 10:38:54,261 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-01 10:38:54,261 INFO L158 Benchmark]: Toolchain (without parser) took 49593.83ms. Allocated memory was 182.5MB in the beginning and 1.0GB in the end (delta: 859.8MB). Free memory was 141.8MB in the beginning and 596.6MB in the end (delta: -454.8MB). Peak memory consumption was 624.8MB. Max. memory is 8.0GB. [2023-04-01 10:38:54,262 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 182.5MB. Free memory is still 129.9MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 10:38:54,262 INFO L158 Benchmark]: CACSL2BoogieTranslator took 381.13ms. Allocated memory is still 182.5MB. Free memory was 141.5MB in the beginning and 121.9MB in the end (delta: 19.6MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. [2023-04-01 10:38:54,262 INFO L158 Benchmark]: Boogie Preprocessor took 71.25ms. Allocated memory is still 182.5MB. Free memory was 121.9MB in the beginning and 118.8MB in the end (delta: 3.1MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-04-01 10:38:54,262 INFO L158 Benchmark]: RCFGBuilder took 771.00ms. Allocated memory was 182.5MB in the beginning and 277.9MB in the end (delta: 95.4MB). Free memory was 118.8MB in the beginning and 242.4MB in the end (delta: -123.7MB). Peak memory consumption was 52.5MB. Max. memory is 8.0GB. [2023-04-01 10:38:54,263 INFO L158 Benchmark]: TraceAbstraction took 48365.59ms. Allocated memory was 277.9MB in the beginning and 1.0GB in the end (delta: 764.4MB). Free memory was 241.9MB in the beginning and 596.6MB in the end (delta: -354.7MB). Peak memory consumption was 627.9MB. Max. memory is 8.0GB. [2023-04-01 10:38:54,264 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 182.5MB. Free memory is still 129.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 381.13ms. Allocated memory is still 182.5MB. Free memory was 141.5MB in the beginning and 121.9MB in the end (delta: 19.6MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 71.25ms. Allocated memory is still 182.5MB. Free memory was 121.9MB in the beginning and 118.8MB in the end (delta: 3.1MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 771.00ms. Allocated memory was 182.5MB in the beginning and 277.9MB in the end (delta: 95.4MB). Free memory was 118.8MB in the beginning and 242.4MB in the end (delta: -123.7MB). Peak memory consumption was 52.5MB. Max. memory is 8.0GB. * TraceAbstraction took 48365.59ms. Allocated memory was 277.9MB in the beginning and 1.0GB in the end (delta: 764.4MB). Free memory was 241.9MB in the beginning and 596.6MB in the end (delta: -354.7MB). Peak memory consumption was 627.9MB. 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 - PositiveResult [Line: 567]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 115 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 48.3s, OverallIterations: 13, TraceHistogramMax: 7, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 4.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2433 SdHoareTripleChecker+Valid, 1.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2433 mSDsluCounter, 4718 SdHoareTripleChecker+Invalid, 1.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2883 mSDsCounter, 190 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1857 IncrementalHoareTripleChecker+Invalid, 2047 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 190 mSolverCounterUnsat, 1835 mSDtfsCounter, 1857 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 658 GetRequests, 455 SyntacticMatches, 12 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3085 ImplicationChecksByTransitivity, 20.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=208occurred in iteration=9, InterpolantAutomatonStates: 92, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 116 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 21 NumberOfFragments, 552 HoareAnnotationTreeSize, 7 FomulaSimplifications, 1462 FormulaSimplificationTreeSizeReduction, 0.6s HoareSimplificationTime, 7 FomulaSimplificationsInter, 3892 FormulaSimplificationTreeSizeReductionInter, 0.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 630 NumberOfCodeBlocks, 630 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 789 ConstructedInterpolants, 0 QuantifiedInterpolants, 5886 SizeOfPredicates, 8 NumberOfNonLiveVariables, 1299 ConjunctsInSsa, 85 ConjunctsInUnsatCore, 22 InterpolantComputations, 9 PerfectInterpolantSequences, 222/500 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: OVERALL_TIME: 2.0s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 3, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 24, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 49, TOOLS_POST_TIME: 1.0s, TOOLS_POST_CALL_APPLICATIONS: 4, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 2, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 46, TOOLS_QUANTIFIERELIM_TIME: 1.1s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 92, FLUID_YES_ANSWERS: 1, DOMAIN_JOIN_APPLICATIONS: 9, DOMAIN_JOIN_TIME: 0.5s, DOMAIN_ALPHA_APPLICATIONS: 1, DOMAIN_ALPHA_TIME: 0.2s, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME: 0.1s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 5, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 24, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 4, LOOP_SUMMARIZER_CACHE_MISSES: 4, LOOP_SUMMARIZER_OVERALL_TIME: 0.5s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.5s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 5, CALL_SUMMARIZER_APPLICATIONS: 2, CALL_SUMMARIZER_CACHE_MISSES: 1, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 397, DAG_COMPRESSION_RETAINED_NODES: 79, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: (((((((((((((((((((!(m_Protocol == 1) || !(3 == m_recv_ack_2)) || !(unknown-#memory_int-unknown[1][0] == 48)) || !(#NULL == 0)) || (((((this_buffer_empty <= 0 && 0 <= this_buffer_empty) && this_expect <= 2 * (this_expect / 2)) && 5 <= q) && 0 <= P8 + 2147483648) && P8 <= 2147483647)) || !(2 == unknown-#length-unknown[1])) || !(\valid[3] == 1)) || !(m_msg_1_1 == 4)) || !(2 == m_msg_2)) || !(6 == m_recv_ack_1_1)) || !(16 == unknown-#length-unknown[2])) || !(unknown-#length-unknown[3] == 12)) || !(\valid[0] == 0)) || !(unknown-#memory_int-unknown[1][1] == 0)) || !(\valid[1] == 1)) || !(7 == m_recv_ack_1_2)) || !(#NULL == 0)) || !(\valid[2] == 1)) || !(m_msg_1_2 == 5)) || unknown-#StackHeapBarrier-unknown <= 0) || ((this_buffer_empty == 0 && this_expect == 0) && q == 0) - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((!(m_Protocol == 1) || !(3 == m_recv_ack_2)) || !(unknown-#memory_int-unknown[1][0] == 48)) || !(#NULL == 0)) || (((((this_buffer_empty <= 0 && 0 <= this_buffer_empty) && this_expect <= 2 * (this_expect / 2)) && 5 <= q) && 0 <= P8 + 2147483648) && P8 <= 2147483647)) || !(2 == unknown-#length-unknown[1])) || (((((this_buffer_empty <= 0 && q == 3) && 0 <= this_buffer_empty) && this_expect <= (-1 + this_expect) / 2 * 2 + 1) && 0 <= P8 + 2147483648) && P8 <= 2147483647)) || !(\valid[3] == 1)) || !(m_msg_1_1 == 4)) || !(2 == m_msg_2)) || !(6 == m_recv_ack_1_1)) || !(16 == unknown-#length-unknown[2])) || !(unknown-#length-unknown[3] == 12)) || !(\valid[0] == 0)) || !(unknown-#memory_int-unknown[1][1] == 0)) || !(\valid[1] == 1)) || !(7 == m_recv_ack_1_2)) || !(#NULL == 0)) || (((((!(this_expect % 2 == 0) && 1 <= this_buffer_empty) && this_buffer_empty <= 1) && 0 <= P8 + 2147483648) && q == 4) && P8 <= 2147483647)) || !(\valid[2] == 1)) || !(m_msg_1_2 == 5)) || unknown-#StackHeapBarrier-unknown <= 0) || (((((this_expect <= 2 * (this_expect / 2) && 1 <= this_buffer_empty) && this_buffer_empty <= 1) && 0 <= P8 + 2147483648) && q == 1) && P8 <= 2147483647)) || ((this_buffer_empty == 0 && this_expect == 0) && q == 0) - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: (((((((((((((((((!(m_Protocol == 1) || !(3 == m_recv_ack_2)) || !(unknown-#memory_int-unknown[1][0] == 48)) || !(#NULL == 0)) || !(2 == unknown-#length-unknown[1])) || !(\valid[3] == 1)) || !(m_msg_1_1 == 4)) || !(2 == m_msg_2)) || !(6 == m_recv_ack_1_1)) || !(16 == unknown-#length-unknown[2])) || !(unknown-#length-unknown[3] == 12)) || !(\valid[0] == 0)) || !(unknown-#memory_int-unknown[1][1] == 0)) || !(\valid[1] == 1)) || !(7 == m_recv_ack_1_2)) || !(#NULL == 0)) || !(\valid[2] == 1)) || !(m_msg_1_2 == 5)) || unknown-#StackHeapBarrier-unknown <= 0 RESULT: Ultimate proved your program to be correct! [2023-04-01 10:38:54,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...