/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Overflow-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/termination-crafted/Ackermann-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-16 17:49:11,258 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-16 17:49:11,262 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-16 17:49:11,325 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-10-16 17:49:11,430 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-16 17:49:11,431 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-16 17:49:11,432 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-16 17:49:11,433 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Overflow-32bit-Automizer_Default.epf [2022-10-16 17:49:11,488 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-16 17:49:11,488 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-16 17:49:11,489 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-16 17:49:11,489 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-16 17:49:11,491 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-16 17:49:11,491 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-16 17:49:11,492 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-16 17:49:11,492 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-16 17:49:11,493 INFO L138 SettingsManager]: * Use SBE=true [2022-10-16 17:49:11,493 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-16 17:49:11,493 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-16 17:49:11,493 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-16 17:49:11,493 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-16 17:49:11,494 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-16 17:49:11,494 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-16 17:49:11,494 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-16 17:49:11,494 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-16 17:49:11,494 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-16 17:49:11,494 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-10-16 17:49:11,494 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-16 17:49:11,494 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-16 17:49:11,498 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-16 17:49:11,498 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-16 17:49:11,498 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-16 17:49:11,498 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-16 17:49:11,499 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-16 17:49:11,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 17:49:11,499 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-16 17:49:11,500 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-16 17:49:11,500 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-16 17:49:11,501 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-16 17:49:11,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-16 17:49:11,501 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-16 17:49:11,501 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-16 17:49:11,922 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-16 17:49:11,969 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-16 17:49:11,974 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-16 17:49:11,975 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-16 17:49:11,976 INFO L275 PluginConnector]: CDTParser initialized [2022-10-16 17:49:11,978 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/Ackermann-2.c [2022-10-16 17:49:12,060 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd53b77a9/2b23da3cb93340a28f550d41d09283c0/FLAGa3d016097 [2022-10-16 17:49:12,629 INFO L306 CDTParser]: Found 1 translation units. [2022-10-16 17:49:12,630 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/Ackermann-2.c [2022-10-16 17:49:12,638 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd53b77a9/2b23da3cb93340a28f550d41d09283c0/FLAGa3d016097 [2022-10-16 17:49:13,030 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd53b77a9/2b23da3cb93340a28f550d41d09283c0 [2022-10-16 17:49:13,033 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-16 17:49:13,040 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-16 17:49:13,045 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-16 17:49:13,045 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-16 17:49:13,051 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-16 17:49:13,052 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 05:49:13" (1/1) ... [2022-10-16 17:49:13,054 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76ed3b26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:49:13, skipping insertion in model container [2022-10-16 17:49:13,054 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 05:49:13" (1/1) ... [2022-10-16 17:49:13,064 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-16 17:49:13,082 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-16 17:49:13,312 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 17:49:13,316 INFO L203 MainTranslator]: Completed pre-run [2022-10-16 17:49:13,334 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 17:49:13,347 INFO L208 MainTranslator]: Completed translation [2022-10-16 17:49:13,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:49:13 WrapperNode [2022-10-16 17:49:13,348 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-16 17:49:13,349 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-16 17:49:13,349 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-16 17:49:13,349 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-16 17:49:13,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:49:13" (1/1) ... [2022-10-16 17:49:13,364 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:49:13" (1/1) ... [2022-10-16 17:49:13,383 INFO L138 Inliner]: procedures = 5, calls = 6, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 23 [2022-10-16 17:49:13,384 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-16 17:49:13,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-16 17:49:13,385 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-16 17:49:13,385 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-16 17:49:13,395 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:49:13" (1/1) ... [2022-10-16 17:49:13,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:49:13" (1/1) ... [2022-10-16 17:49:13,396 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:49:13" (1/1) ... [2022-10-16 17:49:13,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:49:13" (1/1) ... [2022-10-16 17:49:13,399 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:49:13" (1/1) ... [2022-10-16 17:49:13,401 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:49:13" (1/1) ... [2022-10-16 17:49:13,402 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:49:13" (1/1) ... [2022-10-16 17:49:13,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:49:13" (1/1) ... [2022-10-16 17:49:13,405 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-16 17:49:13,406 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-16 17:49:13,406 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-16 17:49:13,406 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-16 17:49:13,407 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:49:13" (1/1) ... [2022-10-16 17:49:13,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 17:49:13,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 17:49:13,446 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) [2022-10-16 17:49:13,472 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 [2022-10-16 17:49:13,515 INFO L130 BoogieDeclarations]: Found specification of procedure Ack [2022-10-16 17:49:13,516 INFO L138 BoogieDeclarations]: Found implementation of procedure Ack [2022-10-16 17:49:13,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-16 17:49:13,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-16 17:49:13,598 INFO L235 CfgBuilder]: Building ICFG [2022-10-16 17:49:13,601 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-16 17:49:13,752 INFO L276 CfgBuilder]: Performing block encoding [2022-10-16 17:49:13,761 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-16 17:49:13,761 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-10-16 17:49:13,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 05:49:13 BoogieIcfgContainer [2022-10-16 17:49:13,764 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-16 17:49:13,766 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-16 17:49:13,767 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-16 17:49:13,771 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-16 17:49:13,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 05:49:13" (1/3) ... [2022-10-16 17:49:13,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b4e0f3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 05:49:13, skipping insertion in model container [2022-10-16 17:49:13,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:49:13" (2/3) ... [2022-10-16 17:49:13,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b4e0f3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 05:49:13, skipping insertion in model container [2022-10-16 17:49:13,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 05:49:13" (3/3) ... [2022-10-16 17:49:13,775 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann-2.c [2022-10-16 17:49:13,796 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-16 17:49:13,796 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-10-16 17:49:13,854 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-16 17:49:13,863 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;@2d6590b0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-16 17:49:13,864 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-10-16 17:49:13,869 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 23 states have (on average 1.565217391304348) internal successors, (36), 31 states have internal predecessors, (36), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-16 17:49:13,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-16 17:49:13,877 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 17:49:13,877 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 17:49:13,878 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-16 17:49:13,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 17:49:13,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1514814515, now seen corresponding path program 1 times [2022-10-16 17:49:13,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 17:49:13,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659286718] [2022-10-16 17:49:13,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:49:13,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 17:49:14,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:14,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 17:49:14,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 17:49:14,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659286718] [2022-10-16 17:49:14,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659286718] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 17:49:14,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 17:49:14,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 17:49:14,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43187071] [2022-10-16 17:49:14,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 17:49:14,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 17:49:14,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 17:49:14,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 17:49:14,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-16 17:49:14,414 INFO L87 Difference]: Start difference. First operand has 37 states, 23 states have (on average 1.565217391304348) internal successors, (36), 31 states have internal predecessors, (36), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 17:49:14,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 17:49:14,655 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2022-10-16 17:49:14,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-16 17:49:14,657 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-10-16 17:49:14,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 17:49:14,671 INFO L225 Difference]: With dead ends: 69 [2022-10-16 17:49:14,671 INFO L226 Difference]: Without dead ends: 60 [2022-10-16 17:49:14,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-16 17:49:14,680 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 54 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 17:49:14,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 120 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 17:49:14,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-10-16 17:49:14,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 52. [2022-10-16 17:49:14,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 43 states have internal predecessors, (53), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-16 17:49:14,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2022-10-16 17:49:14,735 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 9 [2022-10-16 17:49:14,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 17:49:14,736 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2022-10-16 17:49:14,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 17:49:14,737 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2022-10-16 17:49:14,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-16 17:49:14,737 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 17:49:14,737 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 17:49:14,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-16 17:49:14,738 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-16 17:49:14,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 17:49:14,739 INFO L85 PathProgramCache]: Analyzing trace with hash 285390328, now seen corresponding path program 1 times [2022-10-16 17:49:14,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 17:49:14,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507223830] [2022-10-16 17:49:14,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:49:14,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 17:49:14,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:14,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 17:49:14,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 17:49:14,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507223830] [2022-10-16 17:49:14,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507223830] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 17:49:14,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 17:49:14,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 17:49:14,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7140163] [2022-10-16 17:49:14,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 17:49:14,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 17:49:14,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 17:49:14,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 17:49:14,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-16 17:49:14,813 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand has 5 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 17:49:14,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 17:49:14,947 INFO L93 Difference]: Finished difference Result 81 states and 103 transitions. [2022-10-16 17:49:14,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-16 17:49:14,948 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-10-16 17:49:14,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 17:49:14,950 INFO L225 Difference]: With dead ends: 81 [2022-10-16 17:49:14,951 INFO L226 Difference]: Without dead ends: 79 [2022-10-16 17:49:14,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-16 17:49:14,953 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 44 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 17:49:14,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 107 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 17:49:14,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-10-16 17:49:14,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2022-10-16 17:49:14,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 50 states have (on average 1.48) internal successors, (74), 58 states have internal predecessors, (74), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-10-16 17:49:14,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2022-10-16 17:49:14,973 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 10 [2022-10-16 17:49:14,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 17:49:14,974 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2022-10-16 17:49:14,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 17:49:14,974 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2022-10-16 17:49:14,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-16 17:49:14,975 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 17:49:14,975 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 17:49:14,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-16 17:49:14,976 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting AckErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-16 17:49:14,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 17:49:14,977 INFO L85 PathProgramCache]: Analyzing trace with hash 285395549, now seen corresponding path program 1 times [2022-10-16 17:49:14,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 17:49:14,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178983418] [2022-10-16 17:49:14,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:49:14,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 17:49:14,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:15,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 17:49:15,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 17:49:15,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178983418] [2022-10-16 17:49:15,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178983418] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 17:49:15,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 17:49:15,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 17:49:15,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301759046] [2022-10-16 17:49:15,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 17:49:15,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 17:49:15,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 17:49:15,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 17:49:15,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-16 17:49:15,040 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 17:49:15,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 17:49:15,140 INFO L93 Difference]: Finished difference Result 71 states and 93 transitions. [2022-10-16 17:49:15,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 17:49:15,142 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-10-16 17:49:15,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 17:49:15,145 INFO L225 Difference]: With dead ends: 71 [2022-10-16 17:49:15,145 INFO L226 Difference]: Without dead ends: 69 [2022-10-16 17:49:15,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-16 17:49:15,152 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 43 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 17:49:15,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 45 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 17:49:15,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-10-16 17:49:15,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-10-16 17:49:15,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 50 states have (on average 1.36) internal successors, (68), 56 states have internal predecessors, (68), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-10-16 17:49:15,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2022-10-16 17:49:15,182 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 10 [2022-10-16 17:49:15,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 17:49:15,183 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2022-10-16 17:49:15,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 17:49:15,183 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2022-10-16 17:49:15,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-16 17:49:15,184 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 17:49:15,184 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 17:49:15,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-16 17:49:15,185 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting AckErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-16 17:49:15,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 17:49:15,188 INFO L85 PathProgramCache]: Analyzing trace with hash 257327479, now seen corresponding path program 1 times [2022-10-16 17:49:15,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 17:49:15,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427930182] [2022-10-16 17:49:15,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:49:15,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 17:49:15,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:15,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 17:49:15,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 17:49:15,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427930182] [2022-10-16 17:49:15,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427930182] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 17:49:15,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 17:49:15,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 17:49:15,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184742354] [2022-10-16 17:49:15,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 17:49:15,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 17:49:15,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 17:49:15,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 17:49:15,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-16 17:49:15,247 INFO L87 Difference]: Start difference. First operand 69 states and 87 transitions. Second operand has 5 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 17:49:15,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 17:49:15,382 INFO L93 Difference]: Finished difference Result 117 states and 155 transitions. [2022-10-16 17:49:15,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-16 17:49:15,383 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-10-16 17:49:15,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 17:49:15,385 INFO L225 Difference]: With dead ends: 117 [2022-10-16 17:49:15,385 INFO L226 Difference]: Without dead ends: 109 [2022-10-16 17:49:15,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-16 17:49:15,388 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 39 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 17:49:15,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 89 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 17:49:15,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-10-16 17:49:15,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 101. [2022-10-16 17:49:15,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.3066666666666666) internal successors, (98), 82 states have internal predecessors, (98), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-10-16 17:49:15,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 127 transitions. [2022-10-16 17:49:15,413 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 127 transitions. Word has length 11 [2022-10-16 17:49:15,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 17:49:15,414 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 127 transitions. [2022-10-16 17:49:15,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 17:49:15,415 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 127 transitions. [2022-10-16 17:49:15,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-16 17:49:15,416 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 17:49:15,416 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 17:49:15,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-16 17:49:15,417 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting AckErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-16 17:49:15,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 17:49:15,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1926686523, now seen corresponding path program 1 times [2022-10-16 17:49:15,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 17:49:15,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572236551] [2022-10-16 17:49:15,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:49:15,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 17:49:15,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:15,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 17:49:15,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 17:49:15,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572236551] [2022-10-16 17:49:15,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572236551] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 17:49:15,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105405580] [2022-10-16 17:49:15,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:49:15,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:49:15,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 17:49:15,544 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) [2022-10-16 17:49:15,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-16 17:49:15,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:15,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-16 17:49:15,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 17:49:15,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 17:49:15,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 17:49:15,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 17:49:15,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105405580] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 17:49:15,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 17:49:15,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-10-16 17:49:15,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592302038] [2022-10-16 17:49:15,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 17:49:15,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-16 17:49:15,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 17:49:15,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-16 17:49:15,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-10-16 17:49:15,759 INFO L87 Difference]: Start difference. First operand 101 states and 127 transitions. Second operand has 12 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 17:49:16,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 17:49:16,078 INFO L93 Difference]: Finished difference Result 291 states and 389 transitions. [2022-10-16 17:49:16,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-16 17:49:16,079 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-10-16 17:49:16,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 17:49:16,084 INFO L225 Difference]: With dead ends: 291 [2022-10-16 17:49:16,084 INFO L226 Difference]: Without dead ends: 289 [2022-10-16 17:49:16,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-10-16 17:49:16,087 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 280 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 17:49:16,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 169 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 17:49:16,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-10-16 17:49:16,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 253. [2022-10-16 17:49:16,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 195 states have (on average 1.2717948717948717) internal successors, (248), 202 states have internal predecessors, (248), 40 states have call successors, (40), 13 states have call predecessors, (40), 12 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-10-16 17:49:16,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 325 transitions. [2022-10-16 17:49:16,182 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 325 transitions. Word has length 17 [2022-10-16 17:49:16,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 17:49:16,182 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 325 transitions. [2022-10-16 17:49:16,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 17:49:16,183 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 325 transitions. [2022-10-16 17:49:16,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-16 17:49:16,184 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 17:49:16,184 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 17:49:16,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-16 17:49:16,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:49:16,401 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-16 17:49:16,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 17:49:16,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1915370851, now seen corresponding path program 1 times [2022-10-16 17:49:16,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 17:49:16,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72982838] [2022-10-16 17:49:16,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:49:16,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 17:49:16,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:16,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 17:49:16,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 17:49:16,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72982838] [2022-10-16 17:49:16,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72982838] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 17:49:16,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385416506] [2022-10-16 17:49:16,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:49:16,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:49:16,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 17:49:16,554 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) [2022-10-16 17:49:16,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-16 17:49:16,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:16,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-16 17:49:16,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 17:49:16,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 17:49:16,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 17:49:16,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 17:49:16,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385416506] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 17:49:16,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 17:49:16,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-10-16 17:49:16,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950649669] [2022-10-16 17:49:16,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 17:49:16,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-16 17:49:16,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 17:49:16,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-16 17:49:16,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-10-16 17:49:16,708 INFO L87 Difference]: Start difference. First operand 253 states and 325 transitions. Second operand has 12 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 17:49:17,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 17:49:17,033 INFO L93 Difference]: Finished difference Result 530 states and 721 transitions. [2022-10-16 17:49:17,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-10-16 17:49:17,034 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-10-16 17:49:17,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 17:49:17,040 INFO L225 Difference]: With dead ends: 530 [2022-10-16 17:49:17,040 INFO L226 Difference]: Without dead ends: 528 [2022-10-16 17:49:17,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2022-10-16 17:49:17,043 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 262 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 17:49:17,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 176 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 17:49:17,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-10-16 17:49:17,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 462. [2022-10-16 17:49:17,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 360 states have (on average 1.2333333333333334) internal successors, (444), 367 states have internal predecessors, (444), 73 states have call successors, (73), 24 states have call predecessors, (73), 23 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2022-10-16 17:49:17,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 587 transitions. [2022-10-16 17:49:17,119 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 587 transitions. Word has length 18 [2022-10-16 17:49:17,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 17:49:17,120 INFO L495 AbstractCegarLoop]: Abstraction has 462 states and 587 transitions. [2022-10-16 17:49:17,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 17:49:17,120 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 587 transitions. [2022-10-16 17:49:17,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-16 17:49:17,122 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 17:49:17,122 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] [2022-10-16 17:49:17,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-16 17:49:17,335 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,SelfDestructingSolverStorable5 [2022-10-16 17:49:17,336 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-16 17:49:17,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 17:49:17,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1296281757, now seen corresponding path program 1 times [2022-10-16 17:49:17,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 17:49:17,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279398346] [2022-10-16 17:49:17,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:49:17,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 17:49:17,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:17,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-16 17:49:17,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:17,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 17:49:17,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 17:49:17,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279398346] [2022-10-16 17:49:17,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279398346] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 17:49:17,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315455888] [2022-10-16 17:49:17,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:49:17,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:49:17,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 17:49:17,446 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) [2022-10-16 17:49:17,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-16 17:49:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:17,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-16 17:49:17,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 17:49:17,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 17:49:17,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 17:49:17,796 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 17:49:17,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315455888] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 17:49:17,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 17:49:17,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-10-16 17:49:17,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120062802] [2022-10-16 17:49:17,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 17:49:17,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-10-16 17:49:17,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 17:49:17,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-10-16 17:49:17,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2022-10-16 17:49:17,799 INFO L87 Difference]: Start difference. First operand 462 states and 587 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 16 states have internal predecessors, (55), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 17:49:18,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 17:49:18,540 INFO L93 Difference]: Finished difference Result 1161 states and 1652 transitions. [2022-10-16 17:49:18,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-10-16 17:49:18,540 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 16 states have internal predecessors, (55), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2022-10-16 17:49:18,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 17:49:18,547 INFO L225 Difference]: With dead ends: 1161 [2022-10-16 17:49:18,547 INFO L226 Difference]: Without dead ends: 807 [2022-10-16 17:49:18,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=248, Invalid=1012, Unknown=0, NotChecked=0, Total=1260 [2022-10-16 17:49:18,554 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 290 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-16 17:49:18,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 87 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-16 17:49:18,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-10-16 17:49:18,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 602. [2022-10-16 17:49:18,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 468 states have (on average 1.2286324786324787) internal successors, (575), 488 states have internal predecessors, (575), 90 states have call successors, (90), 36 states have call predecessors, (90), 38 states have return successors, (94), 77 states have call predecessors, (94), 70 states have call successors, (94) [2022-10-16 17:49:18,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 759 transitions. [2022-10-16 17:49:18,635 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 759 transitions. Word has length 25 [2022-10-16 17:49:18,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 17:49:18,635 INFO L495 AbstractCegarLoop]: Abstraction has 602 states and 759 transitions. [2022-10-16 17:49:18,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 16 states have internal predecessors, (55), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 17:49:18,636 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 759 transitions. [2022-10-16 17:49:18,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-10-16 17:49:18,638 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 17:49:18,639 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 17:49:18,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-10-16 17:49:18,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:49:18,855 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting AckErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-16 17:49:18,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 17:49:18,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1556535055, now seen corresponding path program 1 times [2022-10-16 17:49:18,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 17:49:18,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352751788] [2022-10-16 17:49:18,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:49:18,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 17:49:18,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:18,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-16 17:49:18,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:19,010 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-16 17:49:19,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 17:49:19,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352751788] [2022-10-16 17:49:19,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352751788] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 17:49:19,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635520133] [2022-10-16 17:49:19,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:49:19,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:49:19,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 17:49:19,013 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) [2022-10-16 17:49:19,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-16 17:49:19,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:19,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-16 17:49:19,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 17:49:19,102 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-16 17:49:19,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 17:49:19,249 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-16 17:49:19,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635520133] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 17:49:19,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 17:49:19,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-10-16 17:49:19,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065535559] [2022-10-16 17:49:19,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 17:49:19,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-10-16 17:49:19,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 17:49:19,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-10-16 17:49:19,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-10-16 17:49:19,252 INFO L87 Difference]: Start difference. First operand 602 states and 759 transitions. Second operand has 15 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 13 states have internal predecessors, (38), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 17:49:19,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 17:49:19,558 INFO L93 Difference]: Finished difference Result 716 states and 928 transitions. [2022-10-16 17:49:19,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-16 17:49:19,559 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 13 states have internal predecessors, (38), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-10-16 17:49:19,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 17:49:19,564 INFO L225 Difference]: With dead ends: 716 [2022-10-16 17:49:19,565 INFO L226 Difference]: Without dead ends: 715 [2022-10-16 17:49:19,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2022-10-16 17:49:19,567 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 183 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 17:49:19,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 132 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 17:49:19,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2022-10-16 17:49:19,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 639. [2022-10-16 17:49:19,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 500 states have (on average 1.226) internal successors, (613), 517 states have internal predecessors, (613), 95 states have call successors, (95), 40 states have call predecessors, (95), 38 states have return successors, (94), 81 states have call predecessors, (94), 70 states have call successors, (94) [2022-10-16 17:49:19,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 802 transitions. [2022-10-16 17:49:19,640 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 802 transitions. Word has length 29 [2022-10-16 17:49:19,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 17:49:19,641 INFO L495 AbstractCegarLoop]: Abstraction has 639 states and 802 transitions. [2022-10-16 17:49:19,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 13 states have internal predecessors, (38), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 17:49:19,641 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 802 transitions. [2022-10-16 17:49:19,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-10-16 17:49:19,643 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 17:49:19,643 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 17:49:19,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-16 17:49:19,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:49:19,857 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting AckErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-16 17:49:19,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 17:49:19,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1598948637, now seen corresponding path program 1 times [2022-10-16 17:49:19,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 17:49:19,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884086547] [2022-10-16 17:49:19,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:49:19,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 17:49:19,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:19,947 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 17:49:19,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 17:49:19,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884086547] [2022-10-16 17:49:19,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884086547] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 17:49:19,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866854176] [2022-10-16 17:49:19,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:49:19,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:49:19,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 17:49:19,950 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) [2022-10-16 17:49:19,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-16 17:49:19,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:19,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-16 17:49:19,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 17:49:20,030 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 17:49:20,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 17:49:20,136 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 17:49:20,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866854176] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 17:49:20,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 17:49:20,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-10-16 17:49:20,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397289272] [2022-10-16 17:49:20,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 17:49:20,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-10-16 17:49:20,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 17:49:20,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-10-16 17:49:20,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-10-16 17:49:20,139 INFO L87 Difference]: Start difference. First operand 639 states and 802 transitions. Second operand has 16 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 10 states have internal predecessors, (48), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 17:49:20,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 17:49:20,565 INFO L93 Difference]: Finished difference Result 1143 states and 1457 transitions. [2022-10-16 17:49:20,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-10-16 17:49:20,566 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 10 states have internal predecessors, (48), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-10-16 17:49:20,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 17:49:20,574 INFO L225 Difference]: With dead ends: 1143 [2022-10-16 17:49:20,574 INFO L226 Difference]: Without dead ends: 1142 [2022-10-16 17:49:20,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2022-10-16 17:49:20,576 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 272 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 17:49:20,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 294 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 17:49:20,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2022-10-16 17:49:20,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 960. [2022-10-16 17:49:20,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 753 states have (on average 1.1899070385126163) internal successors, (896), 781 states have internal predecessors, (896), 139 states have call successors, (139), 61 states have call predecessors, (139), 62 states have return successors, (142), 117 states have call predecessors, (142), 106 states have call successors, (142) [2022-10-16 17:49:20,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 1177 transitions. [2022-10-16 17:49:20,683 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 1177 transitions. Word has length 29 [2022-10-16 17:49:20,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 17:49:20,684 INFO L495 AbstractCegarLoop]: Abstraction has 960 states and 1177 transitions. [2022-10-16 17:49:20,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 10 states have internal predecessors, (48), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 17:49:20,684 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 1177 transitions. [2022-10-16 17:49:20,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-10-16 17:49:20,686 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 17:49:20,687 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 17:49:20,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-16 17:49:20,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:49:20,902 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-16 17:49:20,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 17:49:20,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1637351515, now seen corresponding path program 1 times [2022-10-16 17:49:20,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 17:49:20,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85135030] [2022-10-16 17:49:20,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:49:20,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 17:49:20,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:20,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-16 17:49:20,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:21,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:49:21,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:21,062 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-16 17:49:21,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 17:49:21,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85135030] [2022-10-16 17:49:21,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85135030] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 17:49:21,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634159336] [2022-10-16 17:49:21,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:49:21,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:49:21,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 17:49:21,066 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 17:49:21,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-16 17:49:21,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:21,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-16 17:49:21,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 17:49:21,182 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-16 17:49:21,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 17:49:21,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-16 17:49:21,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634159336] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 17:49:21,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 17:49:21,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-10-16 17:49:21,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069571231] [2022-10-16 17:49:21,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 17:49:21,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-10-16 17:49:21,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 17:49:21,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-10-16 17:49:21,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-10-16 17:49:21,382 INFO L87 Difference]: Start difference. First operand 960 states and 1177 transitions. Second operand has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 14 states have internal predecessors, (42), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2022-10-16 17:49:22,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 17:49:22,047 INFO L93 Difference]: Finished difference Result 1464 states and 2175 transitions. [2022-10-16 17:49:22,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-10-16 17:49:22,047 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 14 states have internal predecessors, (42), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-10-16 17:49:22,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 17:49:22,061 INFO L225 Difference]: With dead ends: 1464 [2022-10-16 17:49:22,061 INFO L226 Difference]: Without dead ends: 1462 [2022-10-16 17:49:22,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2022-10-16 17:49:22,064 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 153 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-16 17:49:22,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 185 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-16 17:49:22,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2022-10-16 17:49:22,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1258. [2022-10-16 17:49:22,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 949 states have (on average 1.178082191780822) internal successors, (1118), 984 states have internal predecessors, (1118), 196 states have call successors, (196), 68 states have call predecessors, (196), 107 states have return successors, (374), 205 states have call predecessors, (374), 162 states have call successors, (374) [2022-10-16 17:49:22,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 1688 transitions. [2022-10-16 17:49:22,222 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 1688 transitions. Word has length 34 [2022-10-16 17:49:22,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 17:49:22,223 INFO L495 AbstractCegarLoop]: Abstraction has 1258 states and 1688 transitions. [2022-10-16 17:49:22,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 14 states have internal predecessors, (42), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2022-10-16 17:49:22,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 1688 transitions. [2022-10-16 17:49:22,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-10-16 17:49:22,225 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 17:49:22,225 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 17:49:22,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-10-16 17:49:22,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:49:22,439 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting AckErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-16 17:49:22,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 17:49:22,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1358090321, now seen corresponding path program 2 times [2022-10-16 17:49:22,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 17:49:22,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26607126] [2022-10-16 17:49:22,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:49:22,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 17:49:22,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:22,477 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-10-16 17:49:22,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 17:49:22,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26607126] [2022-10-16 17:49:22,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26607126] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 17:49:22,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 17:49:22,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 17:49:22,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682398467] [2022-10-16 17:49:22,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 17:49:22,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 17:49:22,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 17:49:22,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 17:49:22,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 17:49:22,483 INFO L87 Difference]: Start difference. First operand 1258 states and 1688 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 17:49:22,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 17:49:22,658 INFO L93 Difference]: Finished difference Result 2218 states and 3257 transitions. [2022-10-16 17:49:22,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 17:49:22,659 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-10-16 17:49:22,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 17:49:22,670 INFO L225 Difference]: With dead ends: 2218 [2022-10-16 17:49:22,670 INFO L226 Difference]: Without dead ends: 1239 [2022-10-16 17:49:22,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-16 17:49:22,682 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 26 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 17:49:22,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 91 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 17:49:22,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2022-10-16 17:49:22,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1238. [2022-10-16 17:49:22,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 933 states have (on average 1.172561629153269) internal successors, (1094), 972 states have internal predecessors, (1094), 192 states have call successors, (192), 68 states have call predecessors, (192), 107 states have return successors, (366), 197 states have call predecessors, (366), 158 states have call successors, (366) [2022-10-16 17:49:22,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 1652 transitions. [2022-10-16 17:49:22,833 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 1652 transitions. Word has length 35 [2022-10-16 17:49:22,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 17:49:22,835 INFO L495 AbstractCegarLoop]: Abstraction has 1238 states and 1652 transitions. [2022-10-16 17:49:22,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 17:49:22,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 1652 transitions. [2022-10-16 17:49:22,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-10-16 17:49:22,836 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 17:49:22,837 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2022-10-16 17:49:22,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-10-16 17:49:22,837 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-16 17:49:22,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 17:49:22,837 INFO L85 PathProgramCache]: Analyzing trace with hash 781710624, now seen corresponding path program 1 times [2022-10-16 17:49:22,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 17:49:22,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622508119] [2022-10-16 17:49:22,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:49:22,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 17:49:22,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:22,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-16 17:49:22,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:22,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:49:22,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:23,033 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-16 17:49:23,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 17:49:23,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622508119] [2022-10-16 17:49:23,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622508119] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 17:49:23,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045575922] [2022-10-16 17:49:23,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:49:23,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:49:23,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 17:49:23,035 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 17:49:23,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-16 17:49:23,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:23,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-16 17:49:23,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 17:49:23,132 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-16 17:49:23,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 17:49:23,340 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-16 17:49:23,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045575922] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-16 17:49:23,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-16 17:49:23,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2022-10-16 17:49:23,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784610672] [2022-10-16 17:49:23,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 17:49:23,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-16 17:49:23,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 17:49:23,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-16 17:49:23,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-10-16 17:49:23,343 INFO L87 Difference]: Start difference. First operand 1238 states and 1652 transitions. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 17:49:23,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 17:49:23,674 INFO L93 Difference]: Finished difference Result 1304 states and 1720 transitions. [2022-10-16 17:49:23,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-16 17:49:23,675 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2022-10-16 17:49:23,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 17:49:23,685 INFO L225 Difference]: With dead ends: 1304 [2022-10-16 17:49:23,685 INFO L226 Difference]: Without dead ends: 1303 [2022-10-16 17:49:23,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-10-16 17:49:23,687 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 63 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 17:49:23,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 134 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 17:49:23,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2022-10-16 17:49:23,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 1237. [2022-10-16 17:49:23,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 933 states have (on average 1.1639871382636655) internal successors, (1086), 971 states have internal predecessors, (1086), 192 states have call successors, (192), 68 states have call predecessors, (192), 107 states have return successors, (366), 197 states have call predecessors, (366), 158 states have call successors, (366) [2022-10-16 17:49:23,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 1644 transitions. [2022-10-16 17:49:23,838 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 1644 transitions. Word has length 35 [2022-10-16 17:49:23,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 17:49:23,838 INFO L495 AbstractCegarLoop]: Abstraction has 1237 states and 1644 transitions. [2022-10-16 17:49:23,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 17:49:23,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 1644 transitions. [2022-10-16 17:49:23,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-10-16 17:49:23,840 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 17:49:23,840 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 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] [2022-10-16 17:49:23,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-16 17:49:24,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:49:24,054 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting AckErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-16 17:49:24,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 17:49:24,055 INFO L85 PathProgramCache]: Analyzing trace with hash 784111185, now seen corresponding path program 1 times [2022-10-16 17:49:24,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 17:49:24,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264209216] [2022-10-16 17:49:24,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:49:24,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 17:49:24,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:24,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-16 17:49:24,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:24,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:49:24,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:24,255 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-16 17:49:24,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 17:49:24,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264209216] [2022-10-16 17:49:24,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264209216] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 17:49:24,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620646287] [2022-10-16 17:49:24,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:49:24,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:49:24,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 17:49:24,260 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 17:49:24,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-16 17:49:24,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:24,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-16 17:49:24,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 17:49:24,359 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-16 17:49:24,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 17:49:24,592 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-16 17:49:24,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620646287] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-16 17:49:24,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-16 17:49:24,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2022-10-16 17:49:24,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684109851] [2022-10-16 17:49:24,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 17:49:24,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-16 17:49:24,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 17:49:24,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-16 17:49:24,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-10-16 17:49:24,595 INFO L87 Difference]: Start difference. First operand 1237 states and 1644 transitions. Second operand has 9 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 17:49:25,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 17:49:25,034 INFO L93 Difference]: Finished difference Result 1344 states and 1867 transitions. [2022-10-16 17:49:25,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-16 17:49:25,035 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2022-10-16 17:49:25,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 17:49:25,045 INFO L225 Difference]: With dead ends: 1344 [2022-10-16 17:49:25,045 INFO L226 Difference]: Without dead ends: 1343 [2022-10-16 17:49:25,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-10-16 17:49:25,048 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 65 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 17:49:25,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 140 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 17:49:25,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2022-10-16 17:49:25,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1245. [2022-10-16 17:49:25,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 941 states have (on average 1.1594048884165782) internal successors, (1091), 975 states have internal predecessors, (1091), 196 states have call successors, (196), 68 states have call predecessors, (196), 103 states have return successors, (290), 201 states have call predecessors, (290), 162 states have call successors, (290) [2022-10-16 17:49:25,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 1577 transitions. [2022-10-16 17:49:25,210 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 1577 transitions. Word has length 38 [2022-10-16 17:49:25,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 17:49:25,210 INFO L495 AbstractCegarLoop]: Abstraction has 1245 states and 1577 transitions. [2022-10-16 17:49:25,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 17:49:25,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 1577 transitions. [2022-10-16 17:49:25,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-10-16 17:49:25,213 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 17:49:25,213 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 17:49:25,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-16 17:49:25,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-10-16 17:49:25,427 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting AckErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-16 17:49:25,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 17:49:25,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1571086201, now seen corresponding path program 2 times [2022-10-16 17:49:25,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 17:49:25,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17344846] [2022-10-16 17:49:25,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:49:25,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 17:49:25,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:25,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-16 17:49:25,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:25,663 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-16 17:49:25,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 17:49:25,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17344846] [2022-10-16 17:49:25,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17344846] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 17:49:25,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288496721] [2022-10-16 17:49:25,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 17:49:25,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:49:25,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 17:49:25,666 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 17:49:25,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-16 17:49:25,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 17:49:25,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 17:49:25,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2022-10-16 17:49:25,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 17:49:25,794 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-16 17:49:25,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 17:49:26,010 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-16 17:49:26,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288496721] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 17:49:26,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 17:49:26,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-10-16 17:49:26,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261112326] [2022-10-16 17:49:26,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 17:49:26,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-10-16 17:49:26,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 17:49:26,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-10-16 17:49:26,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-10-16 17:49:26,014 INFO L87 Difference]: Start difference. First operand 1245 states and 1577 transitions. Second operand has 23 states, 20 states have (on average 3.2) internal successors, (64), 17 states have internal predecessors, (64), 8 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 17:49:26,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 17:49:26,637 INFO L93 Difference]: Finished difference Result 1511 states and 1952 transitions. [2022-10-16 17:49:26,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-10-16 17:49:26,638 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 3.2) internal successors, (64), 17 states have internal predecessors, (64), 8 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-10-16 17:49:26,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 17:49:26,648 INFO L225 Difference]: With dead ends: 1511 [2022-10-16 17:49:26,648 INFO L226 Difference]: Without dead ends: 1510 [2022-10-16 17:49:26,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=402, Invalid=1238, Unknown=0, NotChecked=0, Total=1640 [2022-10-16 17:49:26,651 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 350 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 17:49:26,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 194 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 17:49:26,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1510 states. [2022-10-16 17:49:26,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1510 to 1294. [2022-10-16 17:49:26,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 982 states have (on average 1.159877800407332) internal successors, (1139), 1013 states have internal predecessors, (1139), 204 states have call successors, (204), 75 states have call predecessors, (204), 103 states have return successors, (290), 205 states have call predecessors, (290), 162 states have call successors, (290) [2022-10-16 17:49:26,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 1633 transitions. [2022-10-16 17:49:26,839 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 1633 transitions. Word has length 45 [2022-10-16 17:49:26,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 17:49:26,839 INFO L495 AbstractCegarLoop]: Abstraction has 1294 states and 1633 transitions. [2022-10-16 17:49:26,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 3.2) internal successors, (64), 17 states have internal predecessors, (64), 8 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 17:49:26,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 1633 transitions. [2022-10-16 17:49:26,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-10-16 17:49:26,841 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 17:49:26,841 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 17:49:26,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-16 17:49:27,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-10-16 17:49:27,056 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting AckErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-16 17:49:27,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 17:49:27,057 INFO L85 PathProgramCache]: Analyzing trace with hash 2038627078, now seen corresponding path program 2 times [2022-10-16 17:49:27,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 17:49:27,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021259951] [2022-10-16 17:49:27,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:49:27,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 17:49:27,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:27,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-16 17:49:27,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:27,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:49:27,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:27,213 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-16 17:49:27,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 17:49:27,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021259951] [2022-10-16 17:49:27,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021259951] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 17:49:27,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424373664] [2022-10-16 17:49:27,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 17:49:27,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:49:27,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 17:49:27,215 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 17:49:27,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-16 17:49:27,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 17:49:27,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 17:49:27,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-16 17:49:27,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 17:49:27,325 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-16 17:49:27,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 17:49:27,546 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-16 17:49:27,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424373664] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 17:49:27,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 17:49:27,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-10-16 17:49:27,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795263548] [2022-10-16 17:49:27,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 17:49:27,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-10-16 17:49:27,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 17:49:27,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-10-16 17:49:27,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-10-16 17:49:27,549 INFO L87 Difference]: Start difference. First operand 1294 states and 1633 transitions. Second operand has 22 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 16 states have internal predecessors, (64), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2022-10-16 17:49:28,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 17:49:28,906 INFO L93 Difference]: Finished difference Result 2900 states and 4185 transitions. [2022-10-16 17:49:28,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-10-16 17:49:28,906 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 16 states have internal predecessors, (64), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 46 [2022-10-16 17:49:28,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 17:49:28,923 INFO L225 Difference]: With dead ends: 2900 [2022-10-16 17:49:28,923 INFO L226 Difference]: Without dead ends: 2031 [2022-10-16 17:49:28,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=582, Invalid=1968, Unknown=0, NotChecked=0, Total=2550 [2022-10-16 17:49:28,935 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 195 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-16 17:49:28,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 322 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-16 17:49:28,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2022-10-16 17:49:29,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 1485. [2022-10-16 17:49:29,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1128 states have (on average 1.150709219858156) internal successors, (1298), 1164 states have internal predecessors, (1298), 231 states have call successors, (231), 90 states have call predecessors, (231), 121 states have return successors, (328), 230 states have call predecessors, (328), 181 states have call successors, (328) [2022-10-16 17:49:29,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 1857 transitions. [2022-10-16 17:49:29,158 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 1857 transitions. Word has length 46 [2022-10-16 17:49:29,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 17:49:29,159 INFO L495 AbstractCegarLoop]: Abstraction has 1485 states and 1857 transitions. [2022-10-16 17:49:29,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 16 states have internal predecessors, (64), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2022-10-16 17:49:29,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 1857 transitions. [2022-10-16 17:49:29,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-10-16 17:49:29,161 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 17:49:29,162 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 17:49:29,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-16 17:49:29,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-10-16 17:49:29,376 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting AckErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-16 17:49:29,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 17:49:29,377 INFO L85 PathProgramCache]: Analyzing trace with hash -2109486804, now seen corresponding path program 1 times [2022-10-16 17:49:29,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 17:49:29,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298327587] [2022-10-16 17:49:29,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:49:29,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 17:49:29,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:29,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-10-16 17:49:29,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:29,489 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-10-16 17:49:29,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 17:49:29,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298327587] [2022-10-16 17:49:29,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298327587] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 17:49:29,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245449517] [2022-10-16 17:49:29,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:49:29,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:49:29,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 17:49:29,491 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 17:49:29,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-16 17:49:29,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:29,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-16 17:49:29,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 17:49:29,573 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-10-16 17:49:29,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 17:49:29,660 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-10-16 17:49:29,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245449517] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 17:49:29,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 17:49:29,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-10-16 17:49:29,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010623097] [2022-10-16 17:49:29,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 17:49:29,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-16 17:49:29,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 17:49:29,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-16 17:49:29,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-10-16 17:49:29,662 INFO L87 Difference]: Start difference. First operand 1485 states and 1857 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 17:49:29,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 17:49:29,944 INFO L93 Difference]: Finished difference Result 1573 states and 2040 transitions. [2022-10-16 17:49:29,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-16 17:49:29,945 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 53 [2022-10-16 17:49:29,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 17:49:29,959 INFO L225 Difference]: With dead ends: 1573 [2022-10-16 17:49:29,959 INFO L226 Difference]: Without dead ends: 1502 [2022-10-16 17:49:29,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-10-16 17:49:29,962 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 97 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 17:49:29,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 100 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 17:49:29,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2022-10-16 17:49:30,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1476. [2022-10-16 17:49:30,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1119 states have (on average 1.1492403932082216) internal successors, (1286), 1158 states have internal predecessors, (1286), 231 states have call successors, (231), 87 states have call predecessors, (231), 121 states have return successors, (328), 230 states have call predecessors, (328), 181 states have call successors, (328) [2022-10-16 17:49:30,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 1845 transitions. [2022-10-16 17:49:30,199 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 1845 transitions. Word has length 53 [2022-10-16 17:49:30,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 17:49:30,200 INFO L495 AbstractCegarLoop]: Abstraction has 1476 states and 1845 transitions. [2022-10-16 17:49:30,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 17:49:30,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 1845 transitions. [2022-10-16 17:49:30,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-10-16 17:49:30,204 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 17:49:30,204 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 17:49:30,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-10-16 17:49:30,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-10-16 17:49:30,420 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-16 17:49:30,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 17:49:30,421 INFO L85 PathProgramCache]: Analyzing trace with hash -19527940, now seen corresponding path program 1 times [2022-10-16 17:49:30,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 17:49:30,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337683723] [2022-10-16 17:49:30,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:49:30,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 17:49:30,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:30,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-16 17:49:30,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:30,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:49:30,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:30,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:49:30,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:30,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-16 17:49:30,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-16 17:49:30,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 17:49:30,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337683723] [2022-10-16 17:49:30,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337683723] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 17:49:30,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719194692] [2022-10-16 17:49:30,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:49:30,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:49:30,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 17:49:30,735 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 17:49:30,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-10-16 17:49:30,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:30,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 15 conjunts are in the unsatisfiable core [2022-10-16 17:49:30,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 17:49:30,829 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-10-16 17:49:30,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 17:49:31,323 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-16 17:49:31,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719194692] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 17:49:31,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 17:49:31,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2022-10-16 17:49:31,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251101598] [2022-10-16 17:49:31,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 17:49:31,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-10-16 17:49:31,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 17:49:31,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-10-16 17:49:31,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-10-16 17:49:31,326 INFO L87 Difference]: Start difference. First operand 1476 states and 1845 transitions. Second operand has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 21 states have internal predecessors, (57), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-16 17:49:33,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 17:49:33,231 INFO L93 Difference]: Finished difference Result 3508 states and 6163 transitions. [2022-10-16 17:49:33,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-10-16 17:49:33,232 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 21 states have internal predecessors, (57), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 53 [2022-10-16 17:49:33,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 17:49:33,270 INFO L225 Difference]: With dead ends: 3508 [2022-10-16 17:49:33,270 INFO L226 Difference]: Without dead ends: 3506 [2022-10-16 17:49:33,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1669 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1154, Invalid=5008, Unknown=0, NotChecked=0, Total=6162 [2022-10-16 17:49:33,279 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 237 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 657 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 657 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-16 17:49:33,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 303 Invalid, 1511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [657 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-16 17:49:33,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3506 states. [2022-10-16 17:49:33,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3506 to 2546. [2022-10-16 17:49:33,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2546 states, 1794 states have (on average 1.1176142697881828) internal successors, (2005), 1836 states have internal predecessors, (2005), 448 states have call successors, (448), 101 states have call predecessors, (448), 299 states have return successors, (2469), 608 states have call predecessors, (2469), 396 states have call successors, (2469) [2022-10-16 17:49:33,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2546 states to 2546 states and 4922 transitions. [2022-10-16 17:49:33,715 INFO L78 Accepts]: Start accepts. Automaton has 2546 states and 4922 transitions. Word has length 53 [2022-10-16 17:49:33,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 17:49:33,716 INFO L495 AbstractCegarLoop]: Abstraction has 2546 states and 4922 transitions. [2022-10-16 17:49:33,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 21 states have internal predecessors, (57), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-16 17:49:33,716 INFO L276 IsEmpty]: Start isEmpty. Operand 2546 states and 4922 transitions. [2022-10-16 17:49:33,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-10-16 17:49:33,719 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 17:49:33,719 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 17:49:33,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-10-16 17:49:33,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-10-16 17:49:33,934 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting AckErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-16 17:49:33,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 17:49:33,935 INFO L85 PathProgramCache]: Analyzing trace with hash 261691944, now seen corresponding path program 1 times [2022-10-16 17:49:33,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 17:49:33,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277811596] [2022-10-16 17:49:33,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:49:33,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 17:49:33,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:34,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-16 17:49:34,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:34,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:49:34,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:34,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:49:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:34,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-16 17:49:34,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:34,232 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-16 17:49:34,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 17:49:34,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277811596] [2022-10-16 17:49:34,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277811596] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 17:49:34,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150320370] [2022-10-16 17:49:34,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:49:34,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:49:34,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 17:49:34,234 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 17:49:34,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-10-16 17:49:34,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:34,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 15 conjunts are in the unsatisfiable core [2022-10-16 17:49:34,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 17:49:34,374 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-10-16 17:49:34,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 17:49:34,870 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-16 17:49:34,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150320370] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 17:49:34,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 17:49:34,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2022-10-16 17:49:34,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776177230] [2022-10-16 17:49:34,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 17:49:34,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-10-16 17:49:34,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 17:49:34,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-10-16 17:49:34,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-10-16 17:49:34,873 INFO L87 Difference]: Start difference. First operand 2546 states and 4922 transitions. Second operand has 27 states, 26 states have (on average 2.5) internal successors, (65), 21 states have internal predecessors, (65), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-16 17:49:37,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 17:49:37,003 INFO L93 Difference]: Finished difference Result 8958 states and 30816 transitions. [2022-10-16 17:49:37,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-10-16 17:49:37,003 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 21 states have internal predecessors, (65), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 57 [2022-10-16 17:49:37,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 17:49:37,138 INFO L225 Difference]: With dead ends: 8958 [2022-10-16 17:49:37,138 INFO L226 Difference]: Without dead ends: 6874 [2022-10-16 17:49:37,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=906, Invalid=3516, Unknown=0, NotChecked=0, Total=4422 [2022-10-16 17:49:37,208 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 146 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-16 17:49:37,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 321 Invalid, 1096 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [340 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-16 17:49:37,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6874 states. [2022-10-16 17:49:38,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6874 to 5411. [2022-10-16 17:49:38,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5411 states, 3594 states have (on average 1.0787423483583751) internal successors, (3877), 3623 states have internal predecessors, (3877), 1034 states have call successors, (1034), 136 states have call predecessors, (1034), 778 states have return successors, (13748), 1651 states have call predecessors, (13748), 969 states have call successors, (13748) [2022-10-16 17:49:38,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5411 states to 5411 states and 18659 transitions. [2022-10-16 17:49:38,594 INFO L78 Accepts]: Start accepts. Automaton has 5411 states and 18659 transitions. Word has length 57 [2022-10-16 17:49:38,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 17:49:38,595 INFO L495 AbstractCegarLoop]: Abstraction has 5411 states and 18659 transitions. [2022-10-16 17:49:38,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 21 states have internal predecessors, (65), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-16 17:49:38,596 INFO L276 IsEmpty]: Start isEmpty. Operand 5411 states and 18659 transitions. [2022-10-16 17:49:38,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-10-16 17:49:38,599 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 17:49:38,599 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 17:49:38,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-10-16 17:49:38,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-10-16 17:49:38,813 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting AckErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-16 17:49:38,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 17:49:38,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1550907406, now seen corresponding path program 1 times [2022-10-16 17:49:38,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 17:49:38,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119530195] [2022-10-16 17:49:38,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:49:38,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 17:49:38,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:39,006 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-16 17:49:39,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 17:49:39,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119530195] [2022-10-16 17:49:39,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119530195] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 17:49:39,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889714373] [2022-10-16 17:49:39,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:49:39,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:49:39,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 17:49:39,009 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 17:49:39,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-10-16 17:49:39,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:39,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 18 conjunts are in the unsatisfiable core [2022-10-16 17:49:39,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 17:49:39,130 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-16 17:49:39,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 17:49:39,298 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-16 17:49:39,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889714373] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 17:49:39,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 17:49:39,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-10-16 17:49:39,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126393071] [2022-10-16 17:49:39,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 17:49:39,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-10-16 17:49:39,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 17:49:39,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-10-16 17:49:39,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2022-10-16 17:49:39,304 INFO L87 Difference]: Start difference. First operand 5411 states and 18659 transitions. Second operand has 24 states, 21 states have (on average 4.095238095238095) internal successors, (86), 14 states have internal predecessors, (86), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 17:49:41,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 17:49:41,504 INFO L93 Difference]: Finished difference Result 14585 states and 50575 transitions. [2022-10-16 17:49:41,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-10-16 17:49:41,506 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 4.095238095238095) internal successors, (86), 14 states have internal predecessors, (86), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-10-16 17:49:41,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 17:49:41,765 INFO L225 Difference]: With dead ends: 14585 [2022-10-16 17:49:41,765 INFO L226 Difference]: Without dead ends: 14583 [2022-10-16 17:49:41,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2022-10-16 17:49:41,784 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 736 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-16 17:49:41,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 330 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-16 17:49:41,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14583 states. [2022-10-16 17:49:44,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14583 to 14309. [2022-10-16 17:49:44,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14309 states, 9528 states have (on average 1.077560873215785) internal successors, (10267), 9605 states have internal predecessors, (10267), 2726 states have call successors, (2726), 370 states have call predecessors, (2726), 2050 states have return successors, (36260), 4333 states have call predecessors, (36260), 2553 states have call successors, (36260) [2022-10-16 17:49:45,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14309 states to 14309 states and 49253 transitions. [2022-10-16 17:49:45,157 INFO L78 Accepts]: Start accepts. Automaton has 14309 states and 49253 transitions. Word has length 59 [2022-10-16 17:49:45,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 17:49:45,158 INFO L495 AbstractCegarLoop]: Abstraction has 14309 states and 49253 transitions. [2022-10-16 17:49:45,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 4.095238095238095) internal successors, (86), 14 states have internal predecessors, (86), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 17:49:45,158 INFO L276 IsEmpty]: Start isEmpty. Operand 14309 states and 49253 transitions. [2022-10-16 17:49:45,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-10-16 17:49:45,161 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 17:49:45,162 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 17:49:45,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-10-16 17:49:45,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:49:45,377 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting AckErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-16 17:49:45,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 17:49:45,378 INFO L85 PathProgramCache]: Analyzing trace with hash 530431971, now seen corresponding path program 3 times [2022-10-16 17:49:45,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 17:49:45,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249602084] [2022-10-16 17:49:45,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:49:45,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 17:49:45,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:45,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-10-16 17:49:45,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:45,633 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 4 proven. 115 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-16 17:49:45,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 17:49:45,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249602084] [2022-10-16 17:49:45,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249602084] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 17:49:45,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100957133] [2022-10-16 17:49:45,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 17:49:45,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:49:45,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 17:49:45,635 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 17:49:45,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-10-16 17:49:45,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-10-16 17:49:45,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 17:49:45,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2022-10-16 17:49:45,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 17:49:45,798 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 4 proven. 115 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-16 17:49:45,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 17:49:46,103 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 6 proven. 113 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-16 17:49:46,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100957133] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 17:49:46,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 17:49:46,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 30 [2022-10-16 17:49:46,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230325231] [2022-10-16 17:49:46,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 17:49:46,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-10-16 17:49:46,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 17:49:46,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-10-16 17:49:46,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=767, Unknown=0, NotChecked=0, Total=930 [2022-10-16 17:49:46,107 INFO L87 Difference]: Start difference. First operand 14309 states and 49253 transitions. Second operand has 31 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 21 states have internal predecessors, (92), 12 states have call successors, (14), 11 states have call predecessors, (14), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 17:49:49,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 17:49:49,059 INFO L93 Difference]: Finished difference Result 17363 states and 53933 transitions. [2022-10-16 17:49:49,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-10-16 17:49:49,059 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 21 states have internal predecessors, (92), 12 states have call successors, (14), 11 states have call predecessors, (14), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2022-10-16 17:49:49,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 17:49:49,286 INFO L225 Difference]: With dead ends: 17363 [2022-10-16 17:49:49,287 INFO L226 Difference]: Without dead ends: 17362 [2022-10-16 17:49:49,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=894, Invalid=2646, Unknown=0, NotChecked=0, Total=3540 [2022-10-16 17:49:49,312 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 546 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-16 17:49:49,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 295 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-16 17:49:49,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17362 states. [2022-10-16 17:49:52,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17362 to 15109. [2022-10-16 17:49:52,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15109 states, 10214 states have (on average 1.083806540043078) internal successors, (11070), 10311 states have internal predecessors, (11070), 2800 states have call successors, (2800), 455 states have call predecessors, (2800), 2090 states have return successors, (36650), 4342 states have call predecessors, (36650), 2583 states have call successors, (36650) [2022-10-16 17:49:52,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15109 states to 15109 states and 50520 transitions. [2022-10-16 17:49:52,452 INFO L78 Accepts]: Start accepts. Automaton has 15109 states and 50520 transitions. Word has length 61 [2022-10-16 17:49:52,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 17:49:52,452 INFO L495 AbstractCegarLoop]: Abstraction has 15109 states and 50520 transitions. [2022-10-16 17:49:52,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 21 states have internal predecessors, (92), 12 states have call successors, (14), 11 states have call predecessors, (14), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 17:49:52,453 INFO L276 IsEmpty]: Start isEmpty. Operand 15109 states and 50520 transitions. [2022-10-16 17:49:52,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-10-16 17:49:52,468 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 17:49:52,469 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 17:49:52,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-10-16 17:49:52,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:49:52,682 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting AckErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-16 17:49:52,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 17:49:52,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1691602616, now seen corresponding path program 2 times [2022-10-16 17:49:52,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 17:49:52,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189449377] [2022-10-16 17:49:52,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:49:52,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 17:49:52,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:52,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-10-16 17:49:52,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:53,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:49:53,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:53,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:49:53,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:53,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:49:53,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:53,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-16 17:49:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:53,267 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 89 proven. 17 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-10-16 17:49:53,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 17:49:53,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189449377] [2022-10-16 17:49:53,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189449377] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 17:49:53,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263522448] [2022-10-16 17:49:53,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 17:49:53,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:49:53,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 17:49:53,272 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 17:49:53,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-10-16 17:49:53,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 17:49:53,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 17:49:53,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 19 conjunts are in the unsatisfiable core [2022-10-16 17:49:53,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 17:49:53,437 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 78 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-10-16 17:49:53,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 17:49:54,465 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 97 proven. 9 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-10-16 17:49:54,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263522448] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 17:49:54,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 17:49:54,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 32 [2022-10-16 17:49:54,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424792349] [2022-10-16 17:49:54,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 17:49:54,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-10-16 17:49:54,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 17:49:54,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-10-16 17:49:54,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2022-10-16 17:49:54,468 INFO L87 Difference]: Start difference. First operand 15109 states and 50520 transitions. Second operand has 33 states, 32 states have (on average 2.53125) internal successors, (81), 23 states have internal predecessors, (81), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2022-10-16 17:49:56,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 17:49:56,947 INFO L93 Difference]: Finished difference Result 25903 states and 83185 transitions. [2022-10-16 17:49:56,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-10-16 17:49:56,947 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.53125) internal successors, (81), 23 states have internal predecessors, (81), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) Word has length 82 [2022-10-16 17:49:56,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 17:49:57,018 INFO L225 Difference]: With dead ends: 25903 [2022-10-16 17:49:57,018 INFO L226 Difference]: Without dead ends: 11406 [2022-10-16 17:49:57,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2022-10-16 17:49:57,532 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 150 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-16 17:49:57,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 521 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 997 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-16 17:49:57,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11406 states. [2022-10-16 17:49:58,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11406 to 9864. [2022-10-16 17:49:58,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9864 states, 7142 states have (on average 1.1265751890226827) internal successors, (8046), 7383 states have internal predecessors, (8046), 1681 states have call successors, (1681), 507 states have call predecessors, (1681), 1036 states have return successors, (5105), 1973 states have call predecessors, (5105), 1433 states have call successors, (5105) [2022-10-16 17:49:58,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9864 states to 9864 states and 14832 transitions. [2022-10-16 17:49:58,825 INFO L78 Accepts]: Start accepts. Automaton has 9864 states and 14832 transitions. Word has length 82 [2022-10-16 17:49:58,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 17:49:58,825 INFO L495 AbstractCegarLoop]: Abstraction has 9864 states and 14832 transitions. [2022-10-16 17:49:58,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.53125) internal successors, (81), 23 states have internal predecessors, (81), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2022-10-16 17:49:58,826 INFO L276 IsEmpty]: Start isEmpty. Operand 9864 states and 14832 transitions. [2022-10-16 17:49:58,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-10-16 17:49:58,831 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 17:49:58,831 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 6, 6, 6, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 17:49:58,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-10-16 17:49:59,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:49:59,045 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting AckErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-16 17:49:59,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 17:49:59,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1130296539, now seen corresponding path program 3 times [2022-10-16 17:49:59,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 17:49:59,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285383901] [2022-10-16 17:49:59,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:49:59,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 17:49:59,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:59,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-16 17:49:59,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:59,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:49:59,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:49:59,293 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 63 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-16 17:49:59,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 17:49:59,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285383901] [2022-10-16 17:49:59,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285383901] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 17:49:59,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27026889] [2022-10-16 17:49:59,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 17:49:59,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:49:59,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 17:49:59,296 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 17:49:59,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-10-16 17:49:59,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-10-16 17:49:59,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 17:49:59,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 17 conjunts are in the unsatisfiable core [2022-10-16 17:49:59,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 17:49:59,452 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 61 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-16 17:49:59,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 17:49:59,824 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 65 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-16 17:49:59,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27026889] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 17:49:59,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 17:49:59,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2022-10-16 17:49:59,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764965731] [2022-10-16 17:49:59,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 17:49:59,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-10-16 17:49:59,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 17:49:59,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-10-16 17:49:59,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2022-10-16 17:49:59,828 INFO L87 Difference]: Start difference. First operand 9864 states and 14832 transitions. Second operand has 34 states, 33 states have (on average 3.212121212121212) internal successors, (106), 22 states have internal predecessors, (106), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2022-10-16 17:50:02,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 17:50:02,046 INFO L93 Difference]: Finished difference Result 11949 states and 17440 transitions. [2022-10-16 17:50:02,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-10-16 17:50:02,048 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.212121212121212) internal successors, (106), 22 states have internal predecessors, (106), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 70 [2022-10-16 17:50:02,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 17:50:02,097 INFO L225 Difference]: With dead ends: 11949 [2022-10-16 17:50:02,098 INFO L226 Difference]: Without dead ends: 11948 [2022-10-16 17:50:02,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=858, Invalid=2682, Unknown=0, NotChecked=0, Total=3540 [2022-10-16 17:50:02,108 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 310 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-16 17:50:02,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 391 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-16 17:50:02,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11948 states. [2022-10-16 17:50:03,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11948 to 9714. [2022-10-16 17:50:03,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9714 states, 6993 states have (on average 1.118976118976119) internal successors, (7825), 7198 states have internal predecessors, (7825), 1671 states have call successors, (1671), 497 states have call predecessors, (1671), 1045 states have return successors, (5010), 2018 states have call predecessors, (5010), 1406 states have call successors, (5010) [2022-10-16 17:50:03,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9714 states to 9714 states and 14506 transitions. [2022-10-16 17:50:03,363 INFO L78 Accepts]: Start accepts. Automaton has 9714 states and 14506 transitions. Word has length 70 [2022-10-16 17:50:03,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 17:50:03,363 INFO L495 AbstractCegarLoop]: Abstraction has 9714 states and 14506 transitions. [2022-10-16 17:50:03,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.212121212121212) internal successors, (106), 22 states have internal predecessors, (106), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2022-10-16 17:50:03,364 INFO L276 IsEmpty]: Start isEmpty. Operand 9714 states and 14506 transitions. [2022-10-16 17:50:03,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-10-16 17:50:03,371 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 17:50:03,371 INFO L195 NwaCegarLoop]: trace histogram [11, 7, 7, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 17:50:03,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-10-16 17:50:03,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:50:03,584 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-16 17:50:03,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 17:50:03,586 INFO L85 PathProgramCache]: Analyzing trace with hash 153620755, now seen corresponding path program 2 times [2022-10-16 17:50:03,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 17:50:03,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612979825] [2022-10-16 17:50:03,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:50:03,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 17:50:03,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:03,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-10-16 17:50:03,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:03,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:50:03,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:03,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:50:03,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:03,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:50:03,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:03,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:50:03,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:03,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-16 17:50:03,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:03,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-10-16 17:50:03,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:03,861 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 116 proven. 28 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-10-16 17:50:03,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 17:50:03,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612979825] [2022-10-16 17:50:03,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612979825] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 17:50:03,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944967011] [2022-10-16 17:50:03,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 17:50:03,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:50:03,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 17:50:03,863 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 17:50:03,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-10-16 17:50:03,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 17:50:03,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 17:50:03,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-16 17:50:03,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 17:50:03,985 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 118 proven. 15 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-10-16 17:50:03,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 17:50:04,316 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 118 proven. 26 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-10-16 17:50:04,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944967011] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 17:50:04,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 17:50:04,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 8] total 14 [2022-10-16 17:50:04,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059611326] [2022-10-16 17:50:04,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 17:50:04,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-16 17:50:04,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 17:50:04,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-16 17:50:04,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-10-16 17:50:04,321 INFO L87 Difference]: Start difference. First operand 9714 states and 14506 transitions. Second operand has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) [2022-10-16 17:50:05,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 17:50:05,497 INFO L93 Difference]: Finished difference Result 19454 states and 32142 transitions. [2022-10-16 17:50:05,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-16 17:50:05,498 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) Word has length 97 [2022-10-16 17:50:05,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 17:50:05,551 INFO L225 Difference]: With dead ends: 19454 [2022-10-16 17:50:05,551 INFO L226 Difference]: Without dead ends: 10525 [2022-10-16 17:50:05,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 200 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2022-10-16 17:50:05,603 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 53 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 17:50:05,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 100 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 17:50:05,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10525 states. [2022-10-16 17:50:06,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10525 to 9708. [2022-10-16 17:50:06,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9708 states, 6990 states have (on average 1.1190271816881259) internal successors, (7822), 7195 states have internal predecessors, (7822), 1668 states have call successors, (1668), 497 states have call predecessors, (1668), 1045 states have return successors, (4930), 2015 states have call predecessors, (4930), 1376 states have call successors, (4930) [2022-10-16 17:50:06,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9708 states to 9708 states and 14420 transitions. [2022-10-16 17:50:06,747 INFO L78 Accepts]: Start accepts. Automaton has 9708 states and 14420 transitions. Word has length 97 [2022-10-16 17:50:06,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 17:50:06,748 INFO L495 AbstractCegarLoop]: Abstraction has 9708 states and 14420 transitions. [2022-10-16 17:50:06,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) [2022-10-16 17:50:06,748 INFO L276 IsEmpty]: Start isEmpty. Operand 9708 states and 14420 transitions. [2022-10-16 17:50:06,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-10-16 17:50:06,756 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 17:50:06,756 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 17:50:06,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-10-16 17:50:06,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:50:06,970 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting AckErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-16 17:50:06,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 17:50:06,972 INFO L85 PathProgramCache]: Analyzing trace with hash -58684339, now seen corresponding path program 4 times [2022-10-16 17:50:06,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 17:50:06,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533827526] [2022-10-16 17:50:06,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:50:06,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 17:50:06,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:07,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-10-16 17:50:07,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:07,292 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 5 proven. 220 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-16 17:50:07,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 17:50:07,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533827526] [2022-10-16 17:50:07,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533827526] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 17:50:07,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066052211] [2022-10-16 17:50:07,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-16 17:50:07,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:50:07,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 17:50:07,294 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 17:50:07,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-10-16 17:50:07,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-16 17:50:07,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 17:50:07,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2022-10-16 17:50:07,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 17:50:07,442 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 132 proven. 4 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-10-16 17:50:07,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 17:50:07,502 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 132 proven. 4 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-10-16 17:50:07,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066052211] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 17:50:07,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 17:50:07,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 6, 6] total 25 [2022-10-16 17:50:07,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012011536] [2022-10-16 17:50:07,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 17:50:07,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-10-16 17:50:07,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 17:50:07,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-10-16 17:50:07,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-10-16 17:50:07,505 INFO L87 Difference]: Start difference. First operand 9708 states and 14420 transitions. Second operand has 25 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 17 states have internal predecessors, (86), 11 states have call successors, (14), 10 states have call predecessors, (14), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 17:50:08,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 17:50:08,981 INFO L93 Difference]: Finished difference Result 10253 states and 15232 transitions. [2022-10-16 17:50:08,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-10-16 17:50:08,982 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 17 states have internal predecessors, (86), 11 states have call successors, (14), 10 states have call predecessors, (14), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 77 [2022-10-16 17:50:08,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 17:50:09,017 INFO L225 Difference]: With dead ends: 10253 [2022-10-16 17:50:09,017 INFO L226 Difference]: Without dead ends: 7842 [2022-10-16 17:50:09,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=450, Invalid=1620, Unknown=0, NotChecked=0, Total=2070 [2022-10-16 17:50:09,030 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 278 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 17:50:09,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 123 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 17:50:09,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7842 states. [2022-10-16 17:50:09,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7842 to 7247. [2022-10-16 17:50:09,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7247 states, 4977 states have (on average 1.0711271850512356) internal successors, (5331), 5063 states have internal predecessors, (5331), 1411 states have call successors, (1411), 279 states have call predecessors, (1411), 855 states have return successors, (4679), 1904 states have call predecessors, (4679), 1376 states have call successors, (4679) [2022-10-16 17:50:09,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7247 states to 7247 states and 11421 transitions. [2022-10-16 17:50:09,841 INFO L78 Accepts]: Start accepts. Automaton has 7247 states and 11421 transitions. Word has length 77 [2022-10-16 17:50:09,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 17:50:09,841 INFO L495 AbstractCegarLoop]: Abstraction has 7247 states and 11421 transitions. [2022-10-16 17:50:09,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 17 states have internal predecessors, (86), 11 states have call successors, (14), 10 states have call predecessors, (14), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 17:50:09,841 INFO L276 IsEmpty]: Start isEmpty. Operand 7247 states and 11421 transitions. [2022-10-16 17:50:09,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-10-16 17:50:09,848 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 17:50:09,848 INFO L195 NwaCegarLoop]: trace histogram [11, 9, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 17:50:09,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-10-16 17:50:10,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:50:10,064 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-16 17:50:10,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 17:50:10,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1450511938, now seen corresponding path program 3 times [2022-10-16 17:50:10,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 17:50:10,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079359612] [2022-10-16 17:50:10,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:50:10,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 17:50:10,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:10,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-16 17:50:10,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:10,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:50:10,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:10,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:50:10,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:10,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:50:10,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:10,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:50:10,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:10,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:50:10,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:10,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-16 17:50:10,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:10,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-10-16 17:50:10,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:10,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-10-16 17:50:10,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:10,576 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 113 proven. 51 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-10-16 17:50:10,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 17:50:10,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079359612] [2022-10-16 17:50:10,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079359612] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 17:50:10,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429222180] [2022-10-16 17:50:10,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 17:50:10,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:50:10,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 17:50:10,579 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 17:50:10,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-10-16 17:50:10,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-10-16 17:50:10,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 17:50:10,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-16 17:50:10,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 17:50:10,734 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 150 proven. 26 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-10-16 17:50:10,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 17:50:11,500 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 119 proven. 57 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-10-16 17:50:11,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429222180] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 17:50:11,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 17:50:11,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 16 [2022-10-16 17:50:11,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090354280] [2022-10-16 17:50:11,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 17:50:11,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-10-16 17:50:11,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 17:50:11,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-10-16 17:50:11,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-10-16 17:50:11,503 INFO L87 Difference]: Start difference. First operand 7247 states and 11421 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 8 states have call successors, (13), 2 states have call predecessors, (13), 7 states have return successors, (16), 4 states have call predecessors, (16), 8 states have call successors, (16) [2022-10-16 17:50:12,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 17:50:12,643 INFO L93 Difference]: Finished difference Result 16705 states and 34014 transitions. [2022-10-16 17:50:12,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-16 17:50:12,643 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 8 states have call successors, (13), 2 states have call predecessors, (13), 7 states have return successors, (16), 4 states have call predecessors, (16), 8 states have call successors, (16) Word has length 100 [2022-10-16 17:50:12,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 17:50:12,717 INFO L225 Difference]: With dead ends: 16705 [2022-10-16 17:50:12,717 INFO L226 Difference]: Without dead ends: 9998 [2022-10-16 17:50:12,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 209 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2022-10-16 17:50:12,774 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 90 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 17:50:12,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 139 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 17:50:12,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9998 states. [2022-10-16 17:50:13,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9998 to 9637. [2022-10-16 17:50:13,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9637 states, 6522 states have (on average 1.0574977000919963) internal successors, (6897), 6636 states have internal predecessors, (6897), 1956 states have call successors, (1956), 356 states have call predecessors, (1956), 1155 states have return successors, (6547), 2644 states have call predecessors, (6547), 1901 states have call successors, (6547) [2022-10-16 17:50:13,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9637 states to 9637 states and 15400 transitions. [2022-10-16 17:50:13,877 INFO L78 Accepts]: Start accepts. Automaton has 9637 states and 15400 transitions. Word has length 100 [2022-10-16 17:50:13,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 17:50:13,877 INFO L495 AbstractCegarLoop]: Abstraction has 9637 states and 15400 transitions. [2022-10-16 17:50:13,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 8 states have call successors, (13), 2 states have call predecessors, (13), 7 states have return successors, (16), 4 states have call predecessors, (16), 8 states have call successors, (16) [2022-10-16 17:50:13,878 INFO L276 IsEmpty]: Start isEmpty. Operand 9637 states and 15400 transitions. [2022-10-16 17:50:13,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-10-16 17:50:13,887 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 17:50:13,887 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 7, 7, 7, 7, 6, 6, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 17:50:13,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-10-16 17:50:14,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-10-16 17:50:14,101 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting AckErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-16 17:50:14,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 17:50:14,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1122005756, now seen corresponding path program 3 times [2022-10-16 17:50:14,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 17:50:14,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706563705] [2022-10-16 17:50:14,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:50:14,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 17:50:14,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:14,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-16 17:50:14,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:14,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:50:14,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:14,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:50:14,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:14,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-16 17:50:14,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:14,562 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 122 proven. 90 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-16 17:50:14,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 17:50:14,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706563705] [2022-10-16 17:50:14,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706563705] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 17:50:14,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779830289] [2022-10-16 17:50:14,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 17:50:14,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:50:14,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 17:50:14,564 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 17:50:14,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-10-16 17:50:14,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-10-16 17:50:14,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 17:50:14,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 31 conjunts are in the unsatisfiable core [2022-10-16 17:50:14,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 17:50:14,794 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 119 proven. 41 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-10-16 17:50:14,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 17:50:14,983 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 148 proven. 13 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-10-16 17:50:14,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779830289] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 17:50:14,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 17:50:14,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 8] total 29 [2022-10-16 17:50:14,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939298874] [2022-10-16 17:50:14,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 17:50:14,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-10-16 17:50:14,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 17:50:14,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-10-16 17:50:14,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-10-16 17:50:14,988 INFO L87 Difference]: Start difference. First operand 9637 states and 15400 transitions. Second operand has 29 states, 29 states have (on average 3.7586206896551726) internal successors, (109), 22 states have internal predecessors, (109), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2022-10-16 17:50:17,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 17:50:17,454 INFO L93 Difference]: Finished difference Result 16380 states and 28085 transitions. [2022-10-16 17:50:17,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-10-16 17:50:17,455 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.7586206896551726) internal successors, (109), 22 states have internal predecessors, (109), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) Word has length 89 [2022-10-16 17:50:17,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 17:50:17,499 INFO L225 Difference]: With dead ends: 16380 [2022-10-16 17:50:17,499 INFO L226 Difference]: Without dead ends: 7639 [2022-10-16 17:50:17,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=983, Invalid=3439, Unknown=0, NotChecked=0, Total=4422 [2022-10-16 17:50:17,568 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 180 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-16 17:50:17,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 192 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-16 17:50:17,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7639 states. [2022-10-16 17:50:18,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7639 to 6381. [2022-10-16 17:50:18,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6381 states, 4389 states have (on average 1.0476190476190477) internal successors, (4598), 4492 states have internal predecessors, (4598), 1250 states have call successors, (1250), 284 states have call predecessors, (1250), 738 states have return successors, (2929), 1604 states have call predecessors, (2929), 1216 states have call successors, (2929) [2022-10-16 17:50:18,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6381 states to 6381 states and 8777 transitions. [2022-10-16 17:50:18,562 INFO L78 Accepts]: Start accepts. Automaton has 6381 states and 8777 transitions. Word has length 89 [2022-10-16 17:50:18,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 17:50:18,563 INFO L495 AbstractCegarLoop]: Abstraction has 6381 states and 8777 transitions. [2022-10-16 17:50:18,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.7586206896551726) internal successors, (109), 22 states have internal predecessors, (109), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2022-10-16 17:50:18,563 INFO L276 IsEmpty]: Start isEmpty. Operand 6381 states and 8777 transitions. [2022-10-16 17:50:18,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-10-16 17:50:18,568 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 17:50:18,568 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 17:50:18,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-10-16 17:50:18,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-10-16 17:50:18,783 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-16 17:50:18,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 17:50:18,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1200260762, now seen corresponding path program 4 times [2022-10-16 17:50:18,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 17:50:18,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725079318] [2022-10-16 17:50:18,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:50:18,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 17:50:18,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:18,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-16 17:50:18,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:18,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:50:18,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:19,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:50:19,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:19,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:50:19,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:19,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:50:19,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:19,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-16 17:50:19,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:19,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-10-16 17:50:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:19,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-10-16 17:50:19,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:19,126 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 63 proven. 75 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-10-16 17:50:19,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 17:50:19,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725079318] [2022-10-16 17:50:19,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725079318] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 17:50:19,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359877036] [2022-10-16 17:50:19,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-16 17:50:19,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:50:19,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 17:50:19,129 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 17:50:19,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-10-16 17:50:19,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-16 17:50:19,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 17:50:19,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-16 17:50:19,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 17:50:19,288 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 69 proven. 63 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-10-16 17:50:19,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 17:50:19,808 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 69 proven. 90 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-10-16 17:50:19,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359877036] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 17:50:19,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 17:50:19,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 17 [2022-10-16 17:50:19,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706119443] [2022-10-16 17:50:19,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 17:50:19,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-16 17:50:19,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 17:50:19,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-16 17:50:19,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-10-16 17:50:19,811 INFO L87 Difference]: Start difference. First operand 6381 states and 8777 transitions. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 13 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (15), 6 states have call predecessors, (15), 11 states have call successors, (15) [2022-10-16 17:50:20,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 17:50:20,855 INFO L93 Difference]: Finished difference Result 12102 states and 16700 transitions. [2022-10-16 17:50:20,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-10-16 17:50:20,855 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 13 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (15), 6 states have call predecessors, (15), 11 states have call successors, (15) Word has length 91 [2022-10-16 17:50:20,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 17:50:20,886 INFO L225 Difference]: With dead ends: 12102 [2022-10-16 17:50:20,886 INFO L226 Difference]: Without dead ends: 5976 [2022-10-16 17:50:20,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 191 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=203, Invalid=499, Unknown=0, NotChecked=0, Total=702 [2022-10-16 17:50:20,910 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 82 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 17:50:20,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 163 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 17:50:20,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5976 states. [2022-10-16 17:50:21,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5976 to 5526. [2022-10-16 17:50:21,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5526 states, 3888 states have (on average 1.0532407407407407) internal successors, (4095), 3991 states have internal predecessors, (4095), 1030 states have call successors, (1030), 280 states have call predecessors, (1030), 604 states have return successors, (2366), 1254 states have call predecessors, (2366), 1006 states have call successors, (2366) [2022-10-16 17:50:21,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5526 states to 5526 states and 7491 transitions. [2022-10-16 17:50:21,514 INFO L78 Accepts]: Start accepts. Automaton has 5526 states and 7491 transitions. Word has length 91 [2022-10-16 17:50:21,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 17:50:21,515 INFO L495 AbstractCegarLoop]: Abstraction has 5526 states and 7491 transitions. [2022-10-16 17:50:21,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 13 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (15), 6 states have call predecessors, (15), 11 states have call successors, (15) [2022-10-16 17:50:21,515 INFO L276 IsEmpty]: Start isEmpty. Operand 5526 states and 7491 transitions. [2022-10-16 17:50:21,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-10-16 17:50:21,517 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 17:50:21,517 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 17:50:21,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-10-16 17:50:21,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-10-16 17:50:21,718 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting AckErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-16 17:50:21,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 17:50:21,719 INFO L85 PathProgramCache]: Analyzing trace with hash 509936779, now seen corresponding path program 2 times [2022-10-16 17:50:21,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 17:50:21,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338446149] [2022-10-16 17:50:21,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:50:21,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 17:50:21,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:22,120 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 17:50:22,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 17:50:22,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338446149] [2022-10-16 17:50:22,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338446149] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 17:50:22,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109906973] [2022-10-16 17:50:22,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 17:50:22,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:50:22,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 17:50:22,122 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 17:50:22,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-10-16 17:50:22,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 17:50:22,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 17:50:22,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 24 conjunts are in the unsatisfiable core [2022-10-16 17:50:22,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 17:50:22,302 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 17:50:22,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 17:50:22,876 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 17:50:22,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109906973] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 17:50:22,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 17:50:22,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2022-10-16 17:50:22,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307860528] [2022-10-16 17:50:22,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 17:50:22,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-10-16 17:50:22,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 17:50:22,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-10-16 17:50:22,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2022-10-16 17:50:22,880 INFO L87 Difference]: Start difference. First operand 5526 states and 7491 transitions. Second operand has 48 states, 45 states have (on average 3.5555555555555554) internal successors, (160), 26 states have internal predecessors, (160), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 17:50:25,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 17:50:25,629 INFO L93 Difference]: Finished difference Result 12784 states and 17205 transitions. [2022-10-16 17:50:25,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-10-16 17:50:25,629 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 3.5555555555555554) internal successors, (160), 26 states have internal predecessors, (160), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2022-10-16 17:50:25,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 17:50:25,688 INFO L225 Difference]: With dead ends: 12784 [2022-10-16 17:50:25,688 INFO L226 Difference]: Without dead ends: 12783 [2022-10-16 17:50:25,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2022-10-16 17:50:25,701 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 935 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 939 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-16 17:50:25,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [939 Valid, 587 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-16 17:50:25,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12783 states. [2022-10-16 17:50:27,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12783 to 12343. [2022-10-16 17:50:27,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12343 states, 8692 states have (on average 1.0564887252646111) internal successors, (9183), 9084 states have internal predecessors, (9183), 2243 states have call successors, (2243), 564 states have call predecessors, (2243), 1404 states have return successors, (5327), 2694 states have call predecessors, (5327), 2219 states have call successors, (5327) [2022-10-16 17:50:27,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12343 states to 12343 states and 16753 transitions. [2022-10-16 17:50:27,463 INFO L78 Accepts]: Start accepts. Automaton has 12343 states and 16753 transitions. Word has length 93 [2022-10-16 17:50:27,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 17:50:27,463 INFO L495 AbstractCegarLoop]: Abstraction has 12343 states and 16753 transitions. [2022-10-16 17:50:27,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 3.5555555555555554) internal successors, (160), 26 states have internal predecessors, (160), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 17:50:27,464 INFO L276 IsEmpty]: Start isEmpty. Operand 12343 states and 16753 transitions. [2022-10-16 17:50:27,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-10-16 17:50:27,470 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 17:50:27,470 INFO L195 NwaCegarLoop]: trace histogram [20, 13, 13, 10, 10, 10, 10, 10, 10, 7, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 17:50:27,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-10-16 17:50:27,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:50:27,683 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-16 17:50:27,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 17:50:27,684 INFO L85 PathProgramCache]: Analyzing trace with hash -577653681, now seen corresponding path program 5 times [2022-10-16 17:50:27,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 17:50:27,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023942802] [2022-10-16 17:50:27,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:50:27,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 17:50:27,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:27,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-10-16 17:50:27,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:27,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:50:27,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:27,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:50:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:28,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:50:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:28,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-16 17:50:28,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:28,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-10-16 17:50:28,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:28,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:50:28,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:28,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:50:28,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:28,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:50:28,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:28,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:50:28,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:28,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-16 17:50:28,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:28,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-10-16 17:50:28,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:28,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-10-16 17:50:28,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:28,404 INFO L134 CoverageAnalysis]: Checked inductivity of 923 backedges. 230 proven. 65 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2022-10-16 17:50:28,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 17:50:28,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023942802] [2022-10-16 17:50:28,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023942802] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 17:50:28,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045923252] [2022-10-16 17:50:28,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-10-16 17:50:28,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:50:28,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 17:50:28,406 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 17:50:28,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-10-16 17:50:28,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-10-16 17:50:28,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 17:50:28,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 45 conjunts are in the unsatisfiable core [2022-10-16 17:50:28,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 17:50:28,803 INFO L134 CoverageAnalysis]: Checked inductivity of 923 backedges. 602 proven. 60 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2022-10-16 17:50:28,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 17:50:29,198 INFO L134 CoverageAnalysis]: Checked inductivity of 923 backedges. 215 proven. 326 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2022-10-16 17:50:29,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045923252] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 17:50:29,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 17:50:29,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 21] total 40 [2022-10-16 17:50:29,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662441720] [2022-10-16 17:50:29,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 17:50:29,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-10-16 17:50:29,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 17:50:29,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-10-16 17:50:29,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1410, Unknown=0, NotChecked=0, Total=1560 [2022-10-16 17:50:29,202 INFO L87 Difference]: Start difference. First operand 12343 states and 16753 transitions. Second operand has 40 states, 40 states have (on average 2.7) internal successors, (108), 28 states have internal predecessors, (108), 11 states have call successors, (17), 7 states have call predecessors, (17), 13 states have return successors, (22), 15 states have call predecessors, (22), 6 states have call successors, (22) [2022-10-16 17:50:31,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 17:50:31,879 INFO L93 Difference]: Finished difference Result 20319 states and 31403 transitions. [2022-10-16 17:50:31,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-10-16 17:50:31,879 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.7) internal successors, (108), 28 states have internal predecessors, (108), 11 states have call successors, (17), 7 states have call predecessors, (17), 13 states have return successors, (22), 15 states have call predecessors, (22), 6 states have call successors, (22) Word has length 176 [2022-10-16 17:50:31,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 17:50:31,942 INFO L225 Difference]: With dead ends: 20319 [2022-10-16 17:50:31,942 INFO L226 Difference]: Without dead ends: 8393 [2022-10-16 17:50:32,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3061 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1322, Invalid=8380, Unknown=0, NotChecked=0, Total=9702 [2022-10-16 17:50:32,002 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 310 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 1562 mSolverCounterSat, 538 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 2100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 538 IncrementalHoareTripleChecker+Valid, 1562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-10-16 17:50:32,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 529 Invalid, 2100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [538 Valid, 1562 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-10-16 17:50:32,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8393 states. [2022-10-16 17:50:32,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8393 to 5708. [2022-10-16 17:50:32,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5708 states, 3915 states have (on average 1.032183908045977) internal successors, (4041), 3924 states have internal predecessors, (4041), 1030 states have call successors, (1030), 262 states have call predecessors, (1030), 759 states have return successors, (3415), 1521 states have call predecessors, (3415), 1023 states have call successors, (3415) [2022-10-16 17:50:32,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5708 states to 5708 states and 8486 transitions. [2022-10-16 17:50:32,674 INFO L78 Accepts]: Start accepts. Automaton has 5708 states and 8486 transitions. Word has length 176 [2022-10-16 17:50:32,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 17:50:32,675 INFO L495 AbstractCegarLoop]: Abstraction has 5708 states and 8486 transitions. [2022-10-16 17:50:32,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.7) internal successors, (108), 28 states have internal predecessors, (108), 11 states have call successors, (17), 7 states have call predecessors, (17), 13 states have return successors, (22), 15 states have call predecessors, (22), 6 states have call successors, (22) [2022-10-16 17:50:32,675 INFO L276 IsEmpty]: Start isEmpty. Operand 5708 states and 8486 transitions. [2022-10-16 17:50:32,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-10-16 17:50:32,679 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 17:50:32,679 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 17:50:32,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-10-16 17:50:32,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-10-16 17:50:32,892 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting AckErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-16 17:50:32,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 17:50:32,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1783610144, now seen corresponding path program 2 times [2022-10-16 17:50:32,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 17:50:32,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135187402] [2022-10-16 17:50:32,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:50:32,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 17:50:32,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:33,635 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-10-16 17:50:33,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 17:50:33,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135187402] [2022-10-16 17:50:33,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135187402] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 17:50:33,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27715208] [2022-10-16 17:50:33,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 17:50:33,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:50:33,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 17:50:33,640 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 17:50:33,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-10-16 17:50:33,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 17:50:33,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 17:50:33,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 42 conjunts are in the unsatisfiable core [2022-10-16 17:50:33,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 17:50:33,898 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-10-16 17:50:33,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 17:50:34,568 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-10-16 17:50:34,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27715208] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 17:50:34,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 17:50:34,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2022-10-16 17:50:34,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217407530] [2022-10-16 17:50:34,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 17:50:34,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-10-16 17:50:34,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 17:50:34,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-10-16 17:50:34,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2022-10-16 17:50:34,571 INFO L87 Difference]: Start difference. First operand 5708 states and 8486 transitions. Second operand has 48 states, 45 states have (on average 4.5777777777777775) internal successors, (206), 26 states have internal predecessors, (206), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 17:50:37,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 17:50:37,742 INFO L93 Difference]: Finished difference Result 11918 states and 17786 transitions. [2022-10-16 17:50:37,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-10-16 17:50:37,742 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 4.5777777777777775) internal successors, (206), 26 states have internal predecessors, (206), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2022-10-16 17:50:37,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 17:50:37,804 INFO L225 Difference]: With dead ends: 11918 [2022-10-16 17:50:37,804 INFO L226 Difference]: Without dead ends: 11917 [2022-10-16 17:50:37,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 279 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2447, Invalid=5563, Unknown=0, NotChecked=0, Total=8010 [2022-10-16 17:50:37,815 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 2293 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 882 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2296 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 1684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 882 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-16 17:50:37,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2296 Valid, 532 Invalid, 1684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [882 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-16 17:50:37,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11917 states. [2022-10-16 17:50:38,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11917 to 11876. [2022-10-16 17:50:38,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11876 states, 8175 states have (on average 1.031559633027523) internal successors, (8433), 8160 states have internal predecessors, (8433), 2146 states have call successors, (2146), 574 states have call predecessors, (2146), 1551 states have return successors, (7195), 3141 states have call predecessors, (7195), 2139 states have call successors, (7195) [2022-10-16 17:50:39,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11876 states to 11876 states and 17774 transitions. [2022-10-16 17:50:39,020 INFO L78 Accepts]: Start accepts. Automaton has 11876 states and 17774 transitions. Word has length 143 [2022-10-16 17:50:39,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 17:50:39,022 INFO L495 AbstractCegarLoop]: Abstraction has 11876 states and 17774 transitions. [2022-10-16 17:50:39,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 4.5777777777777775) internal successors, (206), 26 states have internal predecessors, (206), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 17:50:39,022 INFO L276 IsEmpty]: Start isEmpty. Operand 11876 states and 17774 transitions. [2022-10-16 17:50:39,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-10-16 17:50:39,027 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 17:50:39,027 INFO L195 NwaCegarLoop]: trace histogram [22, 16, 15, 12, 12, 12, 11, 11, 11, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 17:50:39,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-10-16 17:50:39,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:50:39,240 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting AckErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-16 17:50:39,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 17:50:39,241 INFO L85 PathProgramCache]: Analyzing trace with hash 2136394911, now seen corresponding path program 1 times [2022-10-16 17:50:39,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 17:50:39,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829530120] [2022-10-16 17:50:39,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:50:39,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 17:50:39,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:39,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-10-16 17:50:39,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:39,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:50:39,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:40,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:50:40,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:40,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:50:40,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:40,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:50:40,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:40,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:50:40,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:40,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-16 17:50:40,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:40,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-10-16 17:50:40,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:40,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:50:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:40,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:50:40,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:40,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:50:40,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:40,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:50:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:40,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-16 17:50:40,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:40,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-10-16 17:50:40,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:40,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-10-16 17:50:40,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:40,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1194 backedges. 311 proven. 92 refuted. 0 times theorem prover too weak. 791 trivial. 0 not checked. [2022-10-16 17:50:40,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 17:50:40,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829530120] [2022-10-16 17:50:40,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829530120] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 17:50:40,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618452837] [2022-10-16 17:50:40,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:50:40,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:50:40,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 17:50:40,614 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 17:50:40,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-10-16 17:50:40,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:40,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-16 17:50:40,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 17:50:41,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1194 backedges. 251 proven. 415 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2022-10-16 17:50:41,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 17:50:41,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1194 backedges. 251 proven. 415 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2022-10-16 17:50:41,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618452837] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 17:50:41,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 17:50:41,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 40 [2022-10-16 17:50:41,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776197419] [2022-10-16 17:50:41,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 17:50:41,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-10-16 17:50:41,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 17:50:41,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-10-16 17:50:41,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1398, Unknown=0, NotChecked=0, Total=1560 [2022-10-16 17:50:41,492 INFO L87 Difference]: Start difference. First operand 11876 states and 17774 transitions. Second operand has 40 states, 40 states have (on average 3.075) internal successors, (123), 27 states have internal predecessors, (123), 17 states have call successors, (21), 10 states have call predecessors, (21), 8 states have return successors, (16), 12 states have call predecessors, (16), 7 states have call successors, (16) [2022-10-16 17:50:46,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 17:50:46,136 INFO L93 Difference]: Finished difference Result 31671 states and 62416 transitions. [2022-10-16 17:50:46,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-10-16 17:50:46,136 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.075) internal successors, (123), 27 states have internal predecessors, (123), 17 states have call successors, (21), 10 states have call predecessors, (21), 8 states have return successors, (16), 12 states have call predecessors, (16), 7 states have call successors, (16) Word has length 199 [2022-10-16 17:50:46,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 17:50:46,236 INFO L225 Difference]: With dead ends: 31671 [2022-10-16 17:50:46,236 INFO L226 Difference]: Without dead ends: 19194 [2022-10-16 17:50:46,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 402 SyntacticMatches, 11 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5561 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2641, Invalid=12365, Unknown=0, NotChecked=0, Total=15006 [2022-10-16 17:50:46,307 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 512 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 1879 mSolverCounterSat, 802 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 2681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 802 IncrementalHoareTripleChecker+Valid, 1879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-10-16 17:50:46,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 554 Invalid, 2681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [802 Valid, 1879 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-10-16 17:50:46,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19194 states. [2022-10-16 17:50:47,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19194 to 11849. [2022-10-16 17:50:47,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11849 states, 8331 states have (on average 1.0312087384467652) internal successors, (8591), 8296 states have internal predecessors, (8591), 2053 states have call successors, (2053), 659 states have call predecessors, (2053), 1461 states have return successors, (8124), 2893 states have call predecessors, (8124), 2026 states have call successors, (8124) [2022-10-16 17:50:47,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11849 states to 11849 states and 18768 transitions. [2022-10-16 17:50:47,896 INFO L78 Accepts]: Start accepts. Automaton has 11849 states and 18768 transitions. Word has length 199 [2022-10-16 17:50:47,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 17:50:47,896 INFO L495 AbstractCegarLoop]: Abstraction has 11849 states and 18768 transitions. [2022-10-16 17:50:47,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.075) internal successors, (123), 27 states have internal predecessors, (123), 17 states have call successors, (21), 10 states have call predecessors, (21), 8 states have return successors, (16), 12 states have call predecessors, (16), 7 states have call successors, (16) [2022-10-16 17:50:47,897 INFO L276 IsEmpty]: Start isEmpty. Operand 11849 states and 18768 transitions. [2022-10-16 17:50:47,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-10-16 17:50:47,901 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 17:50:47,901 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 17:50:47,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-10-16 17:50:48,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-10-16 17:50:48,117 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting AckErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-16 17:50:48,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 17:50:48,118 INFO L85 PathProgramCache]: Analyzing trace with hash -592233721, now seen corresponding path program 3 times [2022-10-16 17:50:48,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 17:50:48,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988859516] [2022-10-16 17:50:48,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:50:48,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 17:50:48,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:49,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 0 proven. 2002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 17:50:49,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 17:50:49,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988859516] [2022-10-16 17:50:49,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988859516] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 17:50:49,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6611751] [2022-10-16 17:50:49,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 17:50:49,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:50:49,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 17:50:49,621 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 17:50:49,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-10-16 17:50:49,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-10-16 17:50:49,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 17:50:49,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 48 conjunts are in the unsatisfiable core [2022-10-16 17:50:49,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 17:50:50,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 0 proven. 2002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 17:50:50,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 17:50:52,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 0 proven. 2002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 17:50:52,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6611751] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 17:50:52,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 17:50:52,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2022-10-16 17:50:52,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261479618] [2022-10-16 17:50:52,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 17:50:52,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-10-16 17:50:52,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 17:50:52,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-10-16 17:50:52,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2260, Invalid=6860, Unknown=0, NotChecked=0, Total=9120 [2022-10-16 17:50:52,148 INFO L87 Difference]: Start difference. First operand 11849 states and 18768 transitions. Second operand has 96 states, 93 states have (on average 3.5268817204301075) internal successors, (328), 50 states have internal predecessors, (328), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 17:50:55,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 17:50:55,485 INFO L93 Difference]: Finished difference Result 12043 states and 18985 transitions. [2022-10-16 17:50:55,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-10-16 17:50:55,485 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 93 states have (on average 3.5268817204301075) internal successors, (328), 50 states have internal predecessors, (328), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 189 [2022-10-16 17:50:55,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 17:50:55,545 INFO L225 Difference]: With dead ends: 12043 [2022-10-16 17:50:55,545 INFO L226 Difference]: Without dead ends: 12042 [2022-10-16 17:50:55,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 329 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4407 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5963, Invalid=14917, Unknown=0, NotChecked=0, Total=20880 [2022-10-16 17:50:55,558 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 1102 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1106 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-16 17:50:55,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1106 Valid, 675 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-16 17:50:55,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12042 states. [2022-10-16 17:50:56,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12042 to 12041. [2022-10-16 17:50:56,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12041 states, 8499 states have (on average 1.030591834333451) internal successors, (8759), 8464 states have internal predecessors, (8759), 2077 states have call successors, (2077), 683 states have call predecessors, (2077), 1461 states have return successors, (8124), 2893 states have call predecessors, (8124), 2026 states have call successors, (8124) [2022-10-16 17:50:56,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12041 states to 12041 states and 18960 transitions. [2022-10-16 17:50:56,743 INFO L78 Accepts]: Start accepts. Automaton has 12041 states and 18960 transitions. Word has length 189 [2022-10-16 17:50:56,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 17:50:56,743 INFO L495 AbstractCegarLoop]: Abstraction has 12041 states and 18960 transitions. [2022-10-16 17:50:56,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 93 states have (on average 3.5268817204301075) internal successors, (328), 50 states have internal predecessors, (328), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 17:50:56,743 INFO L276 IsEmpty]: Start isEmpty. Operand 12041 states and 18960 transitions. [2022-10-16 17:50:56,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-10-16 17:50:56,750 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 17:50:56,750 INFO L195 NwaCegarLoop]: trace histogram [27, 24, 15, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 17:50:56,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-10-16 17:50:56,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:50:56,951 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-16 17:50:56,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 17:50:56,952 INFO L85 PathProgramCache]: Analyzing trace with hash -408323828, now seen corresponding path program 6 times [2022-10-16 17:50:56,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 17:50:56,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349815954] [2022-10-16 17:50:56,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:50:56,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 17:50:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:57,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-16 17:50:57,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:57,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:50:57,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:57,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:50:57,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:57,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:50:57,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:57,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:50:57,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:57,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-16 17:50:57,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:57,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-10-16 17:50:57,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:57,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:50:57,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:57,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:50:57,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:57,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:50:57,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:57,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:50:57,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:57,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-16 17:50:57,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:57,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-10-16 17:50:57,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:57,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-10-16 17:50:57,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:57,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-10-16 17:50:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:57,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:50:57,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:57,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:50:57,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:57,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:50:57,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:57,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:50:57,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:57,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:50:57,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:57,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-16 17:50:57,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:57,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-10-16 17:50:57,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:57,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-10-16 17:50:57,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:57,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-10-16 17:50:57,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:50:57,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1925 backedges. 603 proven. 104 refuted. 0 times theorem prover too weak. 1218 trivial. 0 not checked. [2022-10-16 17:50:57,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 17:50:57,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349815954] [2022-10-16 17:50:57,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349815954] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 17:50:57,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92570121] [2022-10-16 17:50:57,971 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-10-16 17:50:57,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:50:57,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 17:50:57,973 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 17:50:57,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-10-16 17:50:58,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-10-16 17:50:58,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 17:50:58,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 33 conjunts are in the unsatisfiable core [2022-10-16 17:50:58,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 17:50:58,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1925 backedges. 581 proven. 106 refuted. 0 times theorem prover too weak. 1238 trivial. 0 not checked. [2022-10-16 17:50:58,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 17:51:01,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1925 backedges. 591 proven. 146 refuted. 0 times theorem prover too weak. 1188 trivial. 0 not checked. [2022-10-16 17:51:01,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92570121] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 17:51:01,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 17:51:01,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 28] total 50 [2022-10-16 17:51:01,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718886162] [2022-10-16 17:51:01,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 17:51:01,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-10-16 17:51:01,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 17:51:01,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-10-16 17:51:01,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=2261, Unknown=0, NotChecked=0, Total=2550 [2022-10-16 17:51:01,147 INFO L87 Difference]: Start difference. First operand 12041 states and 18960 transitions. Second operand has 51 states, 50 states have (on average 1.94) internal successors, (97), 39 states have internal predecessors, (97), 11 states have call successors, (14), 3 states have call predecessors, (14), 18 states have return successors, (24), 21 states have call predecessors, (24), 9 states have call successors, (24) [2022-10-16 17:51:14,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 17:51:14,191 INFO L93 Difference]: Finished difference Result 79461 states and 170336 transitions. [2022-10-16 17:51:14,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 231 states. [2022-10-16 17:51:14,194 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.94) internal successors, (97), 39 states have internal predecessors, (97), 11 states have call successors, (14), 3 states have call predecessors, (14), 18 states have return successors, (24), 21 states have call predecessors, (24), 9 states have call successors, (24) Word has length 248 [2022-10-16 17:51:14,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 17:51:15,084 INFO L225 Difference]: With dead ends: 79461 [2022-10-16 17:51:15,084 INFO L226 Difference]: Without dead ends: 79459 [2022-10-16 17:51:15,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 793 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32943 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=12743, Invalid=63709, Unknown=0, NotChecked=0, Total=76452 [2022-10-16 17:51:15,146 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 203 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 2159 mSolverCounterSat, 1320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 3479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1320 IncrementalHoareTripleChecker+Valid, 2159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-10-16 17:51:15,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 408 Invalid, 3479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1320 Valid, 2159 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-10-16 17:51:15,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79459 states. [2022-10-16 17:51:21,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79459 to 28542. [2022-10-16 17:51:21,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28542 states, 18855 states have (on average 1.0182444974807743) internal successors, (19199), 18778 states have internal predecessors, (19199), 5604 states have call successors, (5604), 980 states have call predecessors, (5604), 4079 states have return successors, (28480), 8783 states have call predecessors, (28480), 5550 states have call successors, (28480) [2022-10-16 17:51:21,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28542 states to 28542 states and 53283 transitions. [2022-10-16 17:51:21,983 INFO L78 Accepts]: Start accepts. Automaton has 28542 states and 53283 transitions. Word has length 248 [2022-10-16 17:51:21,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 17:51:21,984 INFO L495 AbstractCegarLoop]: Abstraction has 28542 states and 53283 transitions. [2022-10-16 17:51:21,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 1.94) internal successors, (97), 39 states have internal predecessors, (97), 11 states have call successors, (14), 3 states have call predecessors, (14), 18 states have return successors, (24), 21 states have call predecessors, (24), 9 states have call successors, (24) [2022-10-16 17:51:21,984 INFO L276 IsEmpty]: Start isEmpty. Operand 28542 states and 53283 transitions. [2022-10-16 17:51:22,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-10-16 17:51:22,000 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 17:51:22,001 INFO L195 NwaCegarLoop]: trace histogram [31, 29, 19, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 17:51:22,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-10-16 17:51:22,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:51:22,202 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting AckErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-16 17:51:22,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 17:51:22,203 INFO L85 PathProgramCache]: Analyzing trace with hash -315916958, now seen corresponding path program 2 times [2022-10-16 17:51:22,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 17:51:22,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345776406] [2022-10-16 17:51:22,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:51:22,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 17:51:22,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:22,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-16 17:51:22,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:23,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:51:23,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:23,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:51:23,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:24,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:51:24,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:24,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:51:24,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:24,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:51:24,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:24,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:51:24,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:24,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:51:24,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:24,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-16 17:51:24,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:24,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-10-16 17:51:24,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:24,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:51:24,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:24,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:51:24,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:24,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:51:24,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:24,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:51:24,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:24,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-16 17:51:24,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:24,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-10-16 17:51:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:24,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-10-16 17:51:24,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:24,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-10-16 17:51:24,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:24,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:51:24,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:24,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:51:24,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:24,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:51:24,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:24,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:51:24,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:24,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:51:24,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:24,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:51:24,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:24,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-16 17:51:24,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:24,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-10-16 17:51:24,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:24,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-10-16 17:51:24,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:24,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-10-16 17:51:24,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:24,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-10-16 17:51:24,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:24,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2658 backedges. 803 proven. 608 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2022-10-16 17:51:24,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 17:51:24,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345776406] [2022-10-16 17:51:24,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345776406] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 17:51:24,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553984215] [2022-10-16 17:51:24,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 17:51:24,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:51:24,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 17:51:24,901 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 17:51:24,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-10-16 17:51:25,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 17:51:25,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 17:51:25,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 28 conjunts are in the unsatisfiable core [2022-10-16 17:51:25,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 17:51:25,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2658 backedges. 872 proven. 669 refuted. 0 times theorem prover too weak. 1117 trivial. 0 not checked. [2022-10-16 17:51:25,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 17:51:29,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2658 backedges. 872 proven. 710 refuted. 0 times theorem prover too weak. 1076 trivial. 0 not checked. [2022-10-16 17:51:29,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553984215] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 17:51:29,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 17:51:29,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 15] total 22 [2022-10-16 17:51:29,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182255757] [2022-10-16 17:51:29,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 17:51:29,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-10-16 17:51:29,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 17:51:29,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-10-16 17:51:29,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-10-16 17:51:29,473 INFO L87 Difference]: Start difference. First operand 28542 states and 53283 transitions. Second operand has 22 states, 22 states have (on average 6.0) internal successors, (132), 22 states have internal predecessors, (132), 15 states have call successors, (25), 2 states have call predecessors, (25), 9 states have return successors, (36), 10 states have call predecessors, (36), 14 states have call successors, (36) [2022-10-16 17:51:35,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 17:51:35,292 INFO L93 Difference]: Finished difference Result 65642 states and 194917 transitions. [2022-10-16 17:51:35,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-16 17:51:35,293 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.0) internal successors, (132), 22 states have internal predecessors, (132), 15 states have call successors, (25), 2 states have call predecessors, (25), 9 states have return successors, (36), 10 states have call predecessors, (36), 14 states have call successors, (36) Word has length 291 [2022-10-16 17:51:35,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 17:51:35,644 INFO L225 Difference]: With dead ends: 65642 [2022-10-16 17:51:35,644 INFO L226 Difference]: Without dead ends: 37778 [2022-10-16 17:51:36,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 627 SyntacticMatches, 14 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=214, Invalid=542, Unknown=0, NotChecked=0, Total=756 [2022-10-16 17:51:36,107 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 129 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 17:51:36,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 270 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 17:51:36,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37778 states. [2022-10-16 17:51:41,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37778 to 35333. [2022-10-16 17:51:41,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35333 states, 23635 states have (on average 1.021535857837952) internal successors, (24144), 23496 states have internal predecessors, (24144), 6607 states have call successors, (6607), 1315 states have call predecessors, (6607), 5087 states have return successors, (49131), 10521 states have call predecessors, (49131), 6550 states have call successors, (49131) [2022-10-16 17:51:42,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35333 states to 35333 states and 79882 transitions. [2022-10-16 17:51:42,192 INFO L78 Accepts]: Start accepts. Automaton has 35333 states and 79882 transitions. Word has length 291 [2022-10-16 17:51:42,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 17:51:42,193 INFO L495 AbstractCegarLoop]: Abstraction has 35333 states and 79882 transitions. [2022-10-16 17:51:42,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.0) internal successors, (132), 22 states have internal predecessors, (132), 15 states have call successors, (25), 2 states have call predecessors, (25), 9 states have return successors, (36), 10 states have call predecessors, (36), 14 states have call successors, (36) [2022-10-16 17:51:42,193 INFO L276 IsEmpty]: Start isEmpty. Operand 35333 states and 79882 transitions. [2022-10-16 17:51:42,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2022-10-16 17:51:42,223 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 17:51:42,223 INFO L195 NwaCegarLoop]: trace histogram [47, 44, 29, 20, 20, 20, 19, 19, 19, 18, 18, 18, 18, 18, 18, 17, 17, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 17:51:42,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-10-16 17:51:42,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:51:42,437 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting AckErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-16 17:51:42,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 17:51:42,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1192539225, now seen corresponding path program 3 times [2022-10-16 17:51:42,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 17:51:42,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989488434] [2022-10-16 17:51:42,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:51:42,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 17:51:42,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:43,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-10-16 17:51:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:44,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:51:45,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:45,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:51:45,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:46,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:51:46,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:46,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:51:46,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:46,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:51:46,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:46,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:51:46,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:46,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:51:46,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:46,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-16 17:51:46,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:46,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-10-16 17:51:46,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:46,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:51:46,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:46,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:51:46,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:46,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:51:46,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:46,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:51:46,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:46,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-16 17:51:46,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:46,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-10-16 17:51:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:46,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-10-16 17:51:46,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:46,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-10-16 17:51:46,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:46,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:51:46,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:46,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:51:46,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:46,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:51:46,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:46,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:51:46,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:46,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:51:46,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:46,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-16 17:51:46,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:46,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-10-16 17:51:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:46,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:51:46,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:46,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:51:46,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:46,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:51:46,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:46,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:51:46,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:46,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-16 17:51:46,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:46,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-10-16 17:51:46,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:46,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-10-16 17:51:46,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:46,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-10-16 17:51:46,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:46,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:51:46,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:47,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:51:47,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:47,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:51:47,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:47,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:51:47,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:47,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:51:47,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:47,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:51:47,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:47,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-16 17:51:47,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:47,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-10-16 17:51:47,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:47,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-10-16 17:51:47,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:47,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-10-16 17:51:47,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:47,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-10-16 17:51:47,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:51:47,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6264 backedges. 1680 proven. 221 refuted. 0 times theorem prover too weak. 4363 trivial. 0 not checked. [2022-10-16 17:51:47,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 17:51:47,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989488434] [2022-10-16 17:51:47,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989488434] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 17:51:47,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472859863] [2022-10-16 17:51:47,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 17:51:47,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:51:47,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 17:51:47,560 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 17:51:47,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-10-16 17:51:47,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-16 17:51:47,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 17:51:47,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-16 17:51:47,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 17:51:47,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6264 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 6070 trivial. 0 not checked. [2022-10-16 17:51:47,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 17:51:47,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472859863] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 17:51:47,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 17:51:47,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [26] total 29 [2022-10-16 17:51:47,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521432097] [2022-10-16 17:51:47,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 17:51:47,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 17:51:47,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 17:51:47,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 17:51:47,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2022-10-16 17:51:47,792 INFO L87 Difference]: Start difference. First operand 35333 states and 79882 transitions. Second operand has 5 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-16 17:51:51,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 17:51:51,968 INFO L93 Difference]: Finished difference Result 35333 states and 79882 transitions. [2022-10-16 17:51:51,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-16 17:51:51,969 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 440 [2022-10-16 17:51:51,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 17:51:52,172 INFO L225 Difference]: With dead ends: 35333 [2022-10-16 17:51:52,172 INFO L226 Difference]: Without dead ends: 35332 [2022-10-16 17:51:52,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 533 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2022-10-16 17:51:52,192 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 34 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 17:51:52,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 93 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 17:51:52,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35332 states. [2022-10-16 17:51:57,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35332 to 35332. [2022-10-16 17:51:57,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35332 states, 23635 states have (on average 1.0144277554474297) internal successors, (23976), 23495 states have internal predecessors, (23976), 6607 states have call successors, (6607), 1315 states have call predecessors, (6607), 5087 states have return successors, (49131), 10521 states have call predecessors, (49131), 6550 states have call successors, (49131) [2022-10-16 17:51:57,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35332 states to 35332 states and 79714 transitions. [2022-10-16 17:51:57,582 INFO L78 Accepts]: Start accepts. Automaton has 35332 states and 79714 transitions. Word has length 440 [2022-10-16 17:51:57,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 17:51:57,583 INFO L495 AbstractCegarLoop]: Abstraction has 35332 states and 79714 transitions. [2022-10-16 17:51:57,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-16 17:51:57,584 INFO L276 IsEmpty]: Start isEmpty. Operand 35332 states and 79714 transitions. [2022-10-16 17:51:57,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-10-16 17:51:57,619 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 17:51:57,619 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 22, 22, 22, 22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 17:51:57,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-10-16 17:51:57,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-10-16 17:51:57,820 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting AckErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-16 17:51:57,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 17:51:57,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1607128964, now seen corresponding path program 3 times [2022-10-16 17:51:57,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 17:51:57,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913529933] [2022-10-16 17:51:57,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:51:57,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 17:51:57,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:01,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4623 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-10-16 17:52:01,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 17:52:01,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913529933] [2022-10-16 17:52:01,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913529933] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 17:52:01,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074805517] [2022-10-16 17:52:01,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 17:52:01,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:52:01,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 17:52:01,421 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 17:52:01,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-10-16 17:52:01,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2022-10-16 17:52:01,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 17:52:01,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 90 conjunts are in the unsatisfiable core [2022-10-16 17:52:01,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 17:52:02,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4623 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-10-16 17:52:02,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 17:52:04,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4623 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-10-16 17:52:04,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074805517] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 17:52:04,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 17:52:04,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2022-10-16 17:52:04,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285402894] [2022-10-16 17:52:04,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 17:52:04,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-10-16 17:52:04,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 17:52:04,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-10-16 17:52:04,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2260, Invalid=6860, Unknown=0, NotChecked=0, Total=9120 [2022-10-16 17:52:04,628 INFO L87 Difference]: Start difference. First operand 35332 states and 79714 transitions. Second operand has 96 states, 93 states have (on average 4.795698924731183) internal successors, (446), 50 states have internal predecessors, (446), 46 states have call successors, (88), 46 states have call predecessors, (88), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 17:52:20,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 17:52:20,101 INFO L93 Difference]: Finished difference Result 74881 states and 169114 transitions. [2022-10-16 17:52:20,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-10-16 17:52:20,102 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 93 states have (on average 4.795698924731183) internal successors, (446), 50 states have internal predecessors, (446), 46 states have call successors, (88), 46 states have call predecessors, (88), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 311 [2022-10-16 17:52:20,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 17:52:20,697 INFO L225 Difference]: With dead ends: 74881 [2022-10-16 17:52:20,697 INFO L226 Difference]: Without dead ends: 74880 [2022-10-16 17:52:20,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 800 GetRequests, 615 SyntacticMatches, 1 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8243 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=10631, Invalid=23779, Unknown=0, NotChecked=0, Total=34410 [2022-10-16 17:52:20,754 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 4372 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 2068 mSolverCounterSat, 2003 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4375 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 4071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2003 IncrementalHoareTripleChecker+Valid, 2068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-10-16 17:52:20,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4375 Valid, 991 Invalid, 4071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2003 Valid, 2068 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-10-16 17:52:20,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74880 states. [2022-10-16 17:52:32,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74880 to 74836. [2022-10-16 17:52:32,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74836 states, 49987 states have (on average 1.014503770980455) internal successors, (50712), 49679 states have internal predecessors, (50712), 13999 states have call successors, (13999), 2755 states have call predecessors, (13999), 10847 states have return successors, (104379), 22401 states have call predecessors, (104379), 13942 states have call successors, (104379) [2022-10-16 17:52:33,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74836 states to 74836 states and 169090 transitions. [2022-10-16 17:52:33,445 INFO L78 Accepts]: Start accepts. Automaton has 74836 states and 169090 transitions. Word has length 311 [2022-10-16 17:52:33,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 17:52:33,445 INFO L495 AbstractCegarLoop]: Abstraction has 74836 states and 169090 transitions. [2022-10-16 17:52:33,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 93 states have (on average 4.795698924731183) internal successors, (446), 50 states have internal predecessors, (446), 46 states have call successors, (88), 46 states have call predecessors, (88), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 17:52:33,446 INFO L276 IsEmpty]: Start isEmpty. Operand 74836 states and 169090 transitions. [2022-10-16 17:52:33,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2022-10-16 17:52:33,523 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 17:52:33,523 INFO L195 NwaCegarLoop]: trace histogram [48, 45, 26, 22, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 19, 19, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 17:52:33,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-10-16 17:52:33,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-10-16 17:52:33,724 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-16 17:52:33,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 17:52:33,725 INFO L85 PathProgramCache]: Analyzing trace with hash -759910376, now seen corresponding path program 7 times [2022-10-16 17:52:33,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 17:52:33,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364081788] [2022-10-16 17:52:33,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 17:52:33,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 17:52:33,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:34,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-16 17:52:34,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:34,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:52:34,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:52:35,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:52:35,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:52:35,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:52:35,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-16 17:52:35,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-10-16 17:52:35,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:52:35,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:52:35,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:52:35,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:52:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-16 17:52:35,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-10-16 17:52:35,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-10-16 17:52:35,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-10-16 17:52:35,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:52:35,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:52:35,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:52:35,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:52:35,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:52:35,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-16 17:52:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-10-16 17:52:35,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-10-16 17:52:35,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-10-16 17:52:35,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2022-10-16 17:52:35,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:52:35,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:52:35,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:52:35,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:52:35,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:52:35,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:52:35,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:52:35,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:52:35,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-16 17:52:35,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-16 17:52:35,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-16 17:52:35,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-10-16 17:52:35,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-10-16 17:52:35,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-10-16 17:52:35,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-10-16 17:52:35,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-10-16 17:52:35,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-10-16 17:52:35,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-10-16 17:52:35,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-10-16 17:52:35,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:35,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6683 backedges. 953 proven. 1845 refuted. 0 times theorem prover too weak. 3885 trivial. 0 not checked. [2022-10-16 17:52:35,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 17:52:35,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364081788] [2022-10-16 17:52:35,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364081788] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 17:52:35,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586913475] [2022-10-16 17:52:35,801 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-10-16 17:52:35,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 17:52:35,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 17:52:35,802 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 17:52:35,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-10-16 17:52:36,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 17:52:36,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 37 conjunts are in the unsatisfiable core [2022-10-16 17:52:36,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 17:52:36,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6683 backedges. 3996 proven. 412 refuted. 0 times theorem prover too weak. 2275 trivial. 0 not checked. [2022-10-16 17:52:36,236 INFO L328 TraceCheckSpWp]: Computing backward predicates...