./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound10.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash acfb876dde79fce1275c4e206713974ad548aff8bf1022b4ac21a21145aaa523 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 00:20:40,115 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 00:20:40,224 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-24 00:20:40,232 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 00:20:40,232 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 00:20:40,261 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 00:20:40,261 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 00:20:40,262 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 00:20:40,262 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 00:20:40,263 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 00:20:40,263 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 00:20:40,263 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 00:20:40,264 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 00:20:40,264 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 00:20:40,264 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 00:20:40,264 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 00:20:40,265 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-24 00:20:40,265 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 00:20:40,265 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 00:20:40,266 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 00:20:40,266 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 00:20:40,271 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-24 00:20:40,271 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 00:20:40,271 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-24 00:20:40,271 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 00:20:40,272 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 00:20:40,272 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-24 00:20:40,272 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 00:20:40,272 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 00:20:40,272 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 00:20:40,273 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 00:20:40,273 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 00:20:40,273 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 00:20:40,273 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 00:20:40,273 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 00:20:40,274 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-24 00:20:40,274 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 00:20:40,277 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 00:20:40,277 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 00:20:40,278 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 00:20:40,278 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 00:20:40,278 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 00:20:40,278 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> acfb876dde79fce1275c4e206713974ad548aff8bf1022b4ac21a21145aaa523 [2024-10-24 00:20:40,515 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 00:20:40,541 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 00:20:40,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 00:20:40,545 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 00:20:40,546 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 00:20:40,547 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound10.c [2024-10-24 00:20:41,870 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 00:20:42,074 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 00:20:42,075 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound10.c [2024-10-24 00:20:42,084 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1c7f3d72/d6d5d7d509c3494c9b0bbaaa6cc526c8/FLAG3896c215e [2024-10-24 00:20:42,102 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1c7f3d72/d6d5d7d509c3494c9b0bbaaa6cc526c8 [2024-10-24 00:20:42,105 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 00:20:42,107 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 00:20:42,117 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 00:20:42,118 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 00:20:42,122 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 00:20:42,122 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:20:42" (1/1) ... [2024-10-24 00:20:42,123 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a03a127 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:20:42, skipping insertion in model container [2024-10-24 00:20:42,123 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:20:42" (1/1) ... [2024-10-24 00:20:42,141 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 00:20:42,310 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound10.c[537,550] [2024-10-24 00:20:42,334 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 00:20:42,347 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 00:20:42,361 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound10.c[537,550] [2024-10-24 00:20:42,373 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 00:20:42,393 INFO L204 MainTranslator]: Completed translation [2024-10-24 00:20:42,394 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:20:42 WrapperNode [2024-10-24 00:20:42,394 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 00:20:42,396 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 00:20:42,396 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 00:20:42,396 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 00:20:42,403 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:20:42" (1/1) ... [2024-10-24 00:20:42,411 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:20:42" (1/1) ... [2024-10-24 00:20:42,429 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 56 [2024-10-24 00:20:42,430 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 00:20:42,431 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 00:20:42,431 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 00:20:42,431 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 00:20:42,441 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:20:42" (1/1) ... [2024-10-24 00:20:42,442 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:20:42" (1/1) ... [2024-10-24 00:20:42,443 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:20:42" (1/1) ... [2024-10-24 00:20:42,456 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-24 00:20:42,460 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:20:42" (1/1) ... [2024-10-24 00:20:42,460 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:20:42" (1/1) ... [2024-10-24 00:20:42,463 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:20:42" (1/1) ... [2024-10-24 00:20:42,467 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:20:42" (1/1) ... [2024-10-24 00:20:42,474 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:20:42" (1/1) ... [2024-10-24 00:20:42,475 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:20:42" (1/1) ... [2024-10-24 00:20:42,476 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 00:20:42,477 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 00:20:42,481 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 00:20:42,481 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 00:20:42,482 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:20:42" (1/1) ... [2024-10-24 00:20:42,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 00:20:42,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:20:42,518 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-24 00:20:42,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-24 00:20:42,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 00:20:42,569 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-24 00:20:42,570 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-24 00:20:42,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 00:20:42,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 00:20:42,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 00:20:42,570 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-24 00:20:42,570 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-24 00:20:42,618 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 00:20:42,621 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 00:20:42,741 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-10-24 00:20:42,741 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 00:20:42,763 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 00:20:42,763 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-24 00:20:42,764 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:20:42 BoogieIcfgContainer [2024-10-24 00:20:42,764 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 00:20:42,766 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 00:20:42,766 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 00:20:42,771 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 00:20:42,771 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:20:42" (1/3) ... [2024-10-24 00:20:42,772 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f631d24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:20:42, skipping insertion in model container [2024-10-24 00:20:42,772 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:20:42" (2/3) ... [2024-10-24 00:20:42,772 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f631d24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:20:42, skipping insertion in model container [2024-10-24 00:20:42,772 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:20:42" (3/3) ... [2024-10-24 00:20:42,773 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound10.c [2024-10-24 00:20:42,803 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 00:20:42,804 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-24 00:20:42,887 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 00:20:42,894 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@2fe23525, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 00:20:42,894 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-24 00:20:42,899 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-24 00:20:42,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-24 00:20:42,906 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:20:42,907 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:20:42,908 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:20:42,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:20:42,915 INFO L85 PathProgramCache]: Analyzing trace with hash 760957734, now seen corresponding path program 1 times [2024-10-24 00:20:42,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:20:42,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619548977] [2024-10-24 00:20:42,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:20:42,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:20:43,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:20:43,052 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:20:43,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:20:43,065 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-24 00:20:43,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:20:43,076 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-24 00:20:43,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:20:43,087 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-24 00:20:43,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:20:43,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619548977] [2024-10-24 00:20:43,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619548977] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:20:43,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:20:43,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 00:20:43,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159160245] [2024-10-24 00:20:43,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:20:43,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-24 00:20:43,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:20:43,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-24 00:20:43,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-24 00:20:43,120 INFO L87 Difference]: Start difference. First operand has 30 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-24 00:20:43,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:20:43,149 INFO L93 Difference]: Finished difference Result 58 states and 99 transitions. [2024-10-24 00:20:43,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-24 00:20:43,152 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2024-10-24 00:20:43,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:20:43,158 INFO L225 Difference]: With dead ends: 58 [2024-10-24 00:20:43,158 INFO L226 Difference]: Without dead ends: 28 [2024-10-24 00:20:43,161 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-24 00:20:43,164 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 00:20:43,165 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 00:20:43,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-10-24 00:20:43,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-10-24 00:20:43,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-24 00:20:43,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2024-10-24 00:20:43,198 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 23 [2024-10-24 00:20:43,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:20:43,198 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2024-10-24 00:20:43,199 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-24 00:20:43,199 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2024-10-24 00:20:43,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-24 00:20:43,200 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:20:43,200 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:20:43,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 00:20:43,201 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:20:43,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:20:43,202 INFO L85 PathProgramCache]: Analyzing trace with hash -387749596, now seen corresponding path program 1 times [2024-10-24 00:20:43,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:20:43,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070674917] [2024-10-24 00:20:43,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:20:43,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:20:43,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:20:43,471 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:20:43,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:20:43,484 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-24 00:20:43,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:20:43,490 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-24 00:20:43,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:20:43,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-24 00:20:43,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:20:43,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070674917] [2024-10-24 00:20:43,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070674917] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:20:43,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:20:43,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 00:20:43,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130887818] [2024-10-24 00:20:43,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:20:43,509 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 00:20:43,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:20:43,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 00:20:43,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 00:20:43,513 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-24 00:20:43,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:20:43,596 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2024-10-24 00:20:43,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 00:20:43,596 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2024-10-24 00:20:43,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:20:43,597 INFO L225 Difference]: With dead ends: 41 [2024-10-24 00:20:43,597 INFO L226 Difference]: Without dead ends: 39 [2024-10-24 00:20:43,598 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-24 00:20:43,598 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 9 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 00:20:43,599 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 119 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 00:20:43,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-10-24 00:20:43,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2024-10-24 00:20:43,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 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) [2024-10-24 00:20:43,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2024-10-24 00:20:43,615 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2024-10-24 00:20:43,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:20:43,615 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2024-10-24 00:20:43,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-24 00:20:43,615 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2024-10-24 00:20:43,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-24 00:20:43,617 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:20:43,617 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:20:43,617 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 00:20:43,617 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:20:43,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:20:43,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1391236353, now seen corresponding path program 1 times [2024-10-24 00:20:43,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:20:43,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953461272] [2024-10-24 00:20:43,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:20:43,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:20:43,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:20:43,919 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:20:43,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:20:43,924 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-24 00:20:43,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:20:43,928 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-24 00:20:43,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:20:43,934 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-24 00:20:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:20:43,944 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-24 00:20:43,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:20:43,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953461272] [2024-10-24 00:20:43,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953461272] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:20:43,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:20:43,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 00:20:43,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622420226] [2024-10-24 00:20:43,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:20:43,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 00:20:43,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:20:43,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 00:20:43,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 00:20:43,949 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-24 00:20:44,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:20:44,050 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2024-10-24 00:20:44,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 00:20:44,052 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2024-10-24 00:20:44,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:20:44,053 INFO L225 Difference]: With dead ends: 45 [2024-10-24 00:20:44,053 INFO L226 Difference]: Without dead ends: 43 [2024-10-24 00:20:44,054 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-24 00:20:44,055 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 9 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:20:44,055 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 116 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:20:44,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-24 00:20:44,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2024-10-24 00:20:44,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-24 00:20:44,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2024-10-24 00:20:44,061 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 28 [2024-10-24 00:20:44,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:20:44,061 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2024-10-24 00:20:44,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-24 00:20:44,062 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2024-10-24 00:20:44,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-24 00:20:44,066 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:20:44,066 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:20:44,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-24 00:20:44,067 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:20:44,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:20:44,067 INFO L85 PathProgramCache]: Analyzing trace with hash 831418820, now seen corresponding path program 1 times [2024-10-24 00:20:44,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:20:44,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665272116] [2024-10-24 00:20:44,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:20:44,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:20:44,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:20:44,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1162324128] [2024-10-24 00:20:44,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:20:44,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:20:44,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:20:44,098 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) [2024-10-24 00:20:44,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 00:20:44,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:20:44,161 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-24 00:20:44,166 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:20:44,373 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-24 00:20:44,373 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 00:20:44,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:20:44,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665272116] [2024-10-24 00:20:44,374 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:20:44,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162324128] [2024-10-24 00:20:44,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162324128] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:20:44,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:20:44,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-24 00:20:44,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161115780] [2024-10-24 00:20:44,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:20:44,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 00:20:44,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:20:44,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 00:20:44,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-10-24 00:20:44,377 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-24 00:20:44,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:20:44,583 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2024-10-24 00:20:44,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 00:20:44,584 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 33 [2024-10-24 00:20:44,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:20:44,585 INFO L225 Difference]: With dead ends: 62 [2024-10-24 00:20:44,585 INFO L226 Difference]: Without dead ends: 49 [2024-10-24 00:20:44,586 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-10-24 00:20:44,587 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 27 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 00:20:44,587 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 139 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 00:20:44,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-10-24 00:20:44,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-10-24 00:20:44,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 states have internal predecessors, (33), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-10-24 00:20:44,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2024-10-24 00:20:44,597 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 33 [2024-10-24 00:20:44,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:20:44,597 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2024-10-24 00:20:44,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-24 00:20:44,598 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2024-10-24 00:20:44,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-24 00:20:44,599 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:20:44,599 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:20:44,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-24 00:20:44,803 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:20:44,804 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:20:44,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:20:44,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1016562388, now seen corresponding path program 1 times [2024-10-24 00:20:44,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:20:44,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481980904] [2024-10-24 00:20:44,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:20:44,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:20:44,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:20:44,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [745699509] [2024-10-24 00:20:44,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:20:44,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:20:44,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:20:44,835 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) [2024-10-24 00:20:44,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 00:20:44,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:20:44,877 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-24 00:20:44,879 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:20:45,106 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-24 00:20:45,106 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:20:45,974 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-24 00:20:45,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:20:45,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481980904] [2024-10-24 00:20:45,974 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:20:45,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745699509] [2024-10-24 00:20:45,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745699509] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:20:45,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 00:20:45,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2024-10-24 00:20:45,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779217196] [2024-10-24 00:20:45,975 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 00:20:45,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-24 00:20:45,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:20:45,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-24 00:20:45,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-10-24 00:20:45,977 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2024-10-24 00:20:46,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:20:46,990 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2024-10-24 00:20:46,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-24 00:20:46,992 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) Word has length 40 [2024-10-24 00:20:46,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:20:46,995 INFO L225 Difference]: With dead ends: 67 [2024-10-24 00:20:46,996 INFO L226 Difference]: Without dead ends: 59 [2024-10-24 00:20:46,997 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2024-10-24 00:20:46,998 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 28 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-24 00:20:46,998 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 157 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-24 00:20:46,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-10-24 00:20:47,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-10-24 00:20:47,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 38 states have internal predecessors, (40), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-10-24 00:20:47,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2024-10-24 00:20:47,020 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 40 [2024-10-24 00:20:47,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:20:47,022 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2024-10-24 00:20:47,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2024-10-24 00:20:47,023 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2024-10-24 00:20:47,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-24 00:20:47,026 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:20:47,026 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:20:47,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-24 00:20:47,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:20:47,227 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:20:47,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:20:47,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1147651331, now seen corresponding path program 1 times [2024-10-24 00:20:47,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:20:47,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907643444] [2024-10-24 00:20:47,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:20:47,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:20:47,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:20:47,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [955009215] [2024-10-24 00:20:47,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:20:47,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:20:47,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:20:47,279 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) [2024-10-24 00:20:47,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 00:20:47,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:20:47,396 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-24 00:20:47,398 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:20:47,470 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-10-24 00:20:47,470 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:20:47,582 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-10-24 00:20:47,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:20:47,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907643444] [2024-10-24 00:20:47,582 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:20:47,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955009215] [2024-10-24 00:20:47,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955009215] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-24 00:20:47,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-24 00:20:47,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2024-10-24 00:20:47,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874760910] [2024-10-24 00:20:47,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:20:47,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 00:20:47,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:20:47,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 00:20:47,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-10-24 00:20:47,585 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-10-24 00:20:51,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-24 00:20:55,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-24 00:20:55,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:20:55,899 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2024-10-24 00:20:55,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 00:20:55,900 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2024-10-24 00:20:55,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:20:55,901 INFO L225 Difference]: With dead ends: 69 [2024-10-24 00:20:55,901 INFO L226 Difference]: Without dead ends: 67 [2024-10-24 00:20:55,902 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-10-24 00:20:55,902 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 5 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2024-10-24 00:20:55,903 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 136 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 2 Unknown, 0 Unchecked, 8.3s Time] [2024-10-24 00:20:55,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-10-24 00:20:55,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2024-10-24 00:20:55,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 40 states have (on average 1.1) internal successors, (44), 43 states have internal predecessors, (44), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-10-24 00:20:55,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2024-10-24 00:20:55,917 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 50 [2024-10-24 00:20:55,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:20:55,917 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2024-10-24 00:20:55,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-10-24 00:20:55,917 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2024-10-24 00:20:55,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-10-24 00:20:55,918 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:20:55,919 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:20:55,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-24 00:20:56,119 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:20:56,120 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:20:56,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:20:56,120 INFO L85 PathProgramCache]: Analyzing trace with hash 961839043, now seen corresponding path program 1 times [2024-10-24 00:20:56,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:20:56,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236289207] [2024-10-24 00:20:56,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:20:56,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:20:56,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:20:56,204 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:20:56,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:20:56,208 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-24 00:20:56,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:20:56,209 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-24 00:20:56,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:20:56,211 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-24 00:20:56,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:20:56,214 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-24 00:20:56,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:20:56,217 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-24 00:20:56,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:20:56,221 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-24 00:20:56,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:20:56,225 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-24 00:20:56,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:20:56,229 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-10-24 00:20:56,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:20:56,234 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-10-24 00:20:56,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:20:56,239 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-10-24 00:20:56,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:20:56,245 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-10-24 00:20:56,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:20:56,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236289207] [2024-10-24 00:20:56,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236289207] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:20:56,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756641608] [2024-10-24 00:20:56,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:20:56,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:20:56,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:20:56,249 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) [2024-10-24 00:20:56,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 00:20:56,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:20:56,325 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 00:20:56,327 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:20:56,412 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-10-24 00:20:56,412 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:20:56,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756641608] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:20:56,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 00:20:56,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8] total 10 [2024-10-24 00:20:56,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490004501] [2024-10-24 00:20:56,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 00:20:56,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 00:20:56,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:20:56,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 00:20:56,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-10-24 00:20:56,478 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 6 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-10-24 00:20:56,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:20:56,796 INFO L93 Difference]: Finished difference Result 98 states and 118 transitions. [2024-10-24 00:20:56,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 00:20:56,796 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 6 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 68 [2024-10-24 00:20:56,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:20:56,797 INFO L225 Difference]: With dead ends: 98 [2024-10-24 00:20:56,797 INFO L226 Difference]: Without dead ends: 90 [2024-10-24 00:20:56,798 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-10-24 00:20:56,798 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 20 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 00:20:56,799 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 177 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-24 00:20:56,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-10-24 00:20:56,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2024-10-24 00:20:56,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 57 states have internal predecessors, (60), 24 states have call successors, (24), 11 states have call predecessors, (24), 11 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2024-10-24 00:20:56,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2024-10-24 00:20:56,822 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 68 [2024-10-24 00:20:56,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:20:56,823 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2024-10-24 00:20:56,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 6 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-10-24 00:20:56,823 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2024-10-24 00:20:56,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-10-24 00:20:56,824 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:20:56,824 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:20:56,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-24 00:20:57,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:20:57,025 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:20:57,025 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:20:57,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1282123871, now seen corresponding path program 1 times [2024-10-24 00:20:57,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:20:57,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326701592] [2024-10-24 00:20:57,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:20:57,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:20:57,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:20:57,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1144457017] [2024-10-24 00:20:57,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:20:57,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:20:57,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:20:57,071 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) [2024-10-24 00:20:57,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-24 00:20:57,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:20:57,358 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-24 00:20:57,360 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:20:58,149 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2024-10-24 00:20:58,149 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:21:35,589 WARN L286 SmtUtils]: Spent 5.69s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-10-24 00:21:47,633 WARN L873 $PredicateComparison]: unable to prove that (let ((.cse1 (mod |c_ULTIMATE.start_main_~B~0#1| 2147483648)) (.cse0 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296))) (or (= .cse0 (mod (+ |c_ULTIMATE.start_main_~B~0#1| |c_ULTIMATE.start_main_~A~0#1| (* .cse1 4294967295)) 4294967296)) (< .cse0 (mod |c_ULTIMATE.start_main_~B~0#1| 4294967296)) (< (* .cse1 2) (+ .cse0 1)))) is different from true [2024-10-24 00:21:48,021 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 29 proven. 30 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2024-10-24 00:21:48,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:21:48,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326701592] [2024-10-24 00:21:48,022 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:21:48,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144457017] [2024-10-24 00:21:48,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144457017] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:21:48,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 00:21:48,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2024-10-24 00:21:48,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371648768] [2024-10-24 00:21:48,023 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 00:21:48,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-24 00:21:48,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:21:48,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-24 00:21:48,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=409, Unknown=5, NotChecked=42, Total=552 [2024-10-24 00:21:48,036 INFO L87 Difference]: Start difference. First operand 89 states and 107 transitions. Second operand has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 19 states have internal predecessors, (38), 11 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 12 states have call predecessors, (22), 9 states have call successors, (22) [2024-10-24 00:21:50,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-24 00:21:55,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-24 00:21:59,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-24 00:22:05,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-24 00:22:09,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-24 00:22:15,856 WARN L286 SmtUtils]: Spent 6.43s on a formula simplification. DAG size of input: 39 DAG size of output: 19 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-10-24 00:22:19,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-24 00:22:23,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []