./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 803cd42f 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 ../sv-benchmarks/c/nla-digbench-scaling/dijkstra-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 74bed2c5921e53f16e234cbc0a2deaaf4b0b51c6cc3f20bfab2fd33a0fce7ecf --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 01:15:12,214 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 01:15:12,271 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-22 01:15:12,276 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 01:15:12,276 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 01:15:12,291 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 01:15:12,291 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 01:15:12,291 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 01:15:12,292 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 01:15:12,294 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 01:15:12,294 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 01:15:12,294 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 01:15:12,295 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 01:15:12,295 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 01:15:12,295 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 01:15:12,295 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 01:15:12,296 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-22 01:15:12,296 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 01:15:12,296 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 01:15:12,296 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 01:15:12,297 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 01:15:12,299 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-22 01:15:12,299 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 01:15:12,299 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-22 01:15:12,300 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 01:15:12,300 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 01:15:12,300 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-22 01:15:12,300 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 01:15:12,300 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 01:15:12,301 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 01:15:12,301 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 01:15:12,301 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 01:15:12,301 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 01:15:12,301 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 01:15:12,302 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 01:15:12,302 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-22 01:15:12,305 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 01:15:12,305 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 01:15:12,306 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 01:15:12,306 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 01:15:12,306 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 01:15:12,306 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 01:15:12,307 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74bed2c5921e53f16e234cbc0a2deaaf4b0b51c6cc3f20bfab2fd33a0fce7ecf [2024-11-22 01:15:12,546 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 01:15:12,570 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 01:15:12,572 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 01:15:12,573 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 01:15:12,574 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 01:15:12,575 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound10.c [2024-11-22 01:15:13,891 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 01:15:14,046 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 01:15:14,046 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound10.c [2024-11-22 01:15:14,052 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/974b0b5b2/aa09f0e250e04cecbbea98646e06010d/FLAG3001158f9 [2024-11-22 01:15:14,065 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/974b0b5b2/aa09f0e250e04cecbbea98646e06010d [2024-11-22 01:15:14,067 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 01:15:14,068 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 01:15:14,069 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 01:15:14,069 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 01:15:14,076 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 01:15:14,077 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:15:14" (1/1) ... [2024-11-22 01:15:14,078 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74d81724 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:15:14, skipping insertion in model container [2024-11-22 01:15:14,079 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:15:14" (1/1) ... [2024-11-22 01:15:14,094 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 01:15:14,213 WARN L250 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/dijkstra-u_valuebound10.c[525,538] [2024-11-22 01:15:14,233 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 01:15:14,239 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 01:15:14,247 WARN L250 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/dijkstra-u_valuebound10.c[525,538] [2024-11-22 01:15:14,257 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 01:15:14,269 INFO L204 MainTranslator]: Completed translation [2024-11-22 01:15:14,270 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:15:14 WrapperNode [2024-11-22 01:15:14,270 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 01:15:14,271 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 01:15:14,271 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 01:15:14,271 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 01:15:14,277 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:15:14" (1/1) ... [2024-11-22 01:15:14,288 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:15:14" (1/1) ... [2024-11-22 01:15:14,301 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 53 [2024-11-22 01:15:14,302 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 01:15:14,302 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 01:15:14,302 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 01:15:14,302 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 01:15:14,310 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:15:14" (1/1) ... [2024-11-22 01:15:14,311 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:15:14" (1/1) ... [2024-11-22 01:15:14,312 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:15:14" (1/1) ... [2024-11-22 01:15:14,320 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]. [2024-11-22 01:15:14,320 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:15:14" (1/1) ... [2024-11-22 01:15:14,321 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:15:14" (1/1) ... [2024-11-22 01:15:14,322 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:15:14" (1/1) ... [2024-11-22 01:15:14,325 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:15:14" (1/1) ... [2024-11-22 01:15:14,325 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:15:14" (1/1) ... [2024-11-22 01:15:14,326 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:15:14" (1/1) ... [2024-11-22 01:15:14,327 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 01:15:14,328 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 01:15:14,328 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 01:15:14,328 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 01:15:14,328 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:15:14" (1/1) ... [2024-11-22 01:15:14,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 01:15:14,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:15:14,358 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) [2024-11-22 01:15:14,361 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 [2024-11-22 01:15:14,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 01:15:14,396 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-22 01:15:14,396 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-22 01:15:14,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 01:15:14,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 01:15:14,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 01:15:14,397 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-22 01:15:14,398 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-22 01:15:14,442 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 01:15:14,458 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 01:15:14,668 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-22 01:15:14,669 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 01:15:14,681 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 01:15:14,681 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-22 01:15:14,681 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:15:14 BoogieIcfgContainer [2024-11-22 01:15:14,681 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 01:15:14,685 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 01:15:14,685 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 01:15:14,687 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 01:15:14,688 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:15:14" (1/3) ... [2024-11-22 01:15:14,689 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14a13a5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:15:14, skipping insertion in model container [2024-11-22 01:15:14,689 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:15:14" (2/3) ... [2024-11-22 01:15:14,689 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14a13a5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:15:14, skipping insertion in model container [2024-11-22 01:15:14,689 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:15:14" (3/3) ... [2024-11-22 01:15:14,690 INFO L112 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound10.c [2024-11-22 01:15:14,703 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 01:15:14,703 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-22 01:15:14,751 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 01:15:14,756 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;@78a6dea7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 01:15:14,756 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-22 01:15:14,759 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-22 01:15:14,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-22 01:15:14,764 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:15:14,764 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:15:14,765 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:15:14,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:15:14,769 INFO L85 PathProgramCache]: Analyzing trace with hash -645822239, now seen corresponding path program 1 times [2024-11-22 01:15:14,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:15:14,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239130680] [2024-11-22 01:15:14,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:15:14,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:15:14,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:15:14,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 01:15:14,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:15:14,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239130680] [2024-11-22 01:15:14,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239130680] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 01:15:14,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071092665] [2024-11-22 01:15:14,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:15:14,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:15:14,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:15:14,896 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) [2024-11-22 01:15:14,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 01:15:14,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:15:14,942 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-22 01:15:14,947 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:15:14,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 01:15:14,957 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 01:15:14,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071092665] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 01:15:14,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 01:15:14,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-22 01:15:14,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419821963] [2024-11-22 01:15:14,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 01:15:14,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-22 01:15:14,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:15:14,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-22 01:15:14,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-22 01:15:14,982 INFO L87 Difference]: Start difference. First operand has 33 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 01:15:15,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:15:15,003 INFO L93 Difference]: Finished difference Result 63 states and 107 transitions. [2024-11-22 01:15:15,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-22 01:15:15,005 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2024-11-22 01:15:15,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:15:15,010 INFO L225 Difference]: With dead ends: 63 [2024-11-22 01:15:15,010 INFO L226 Difference]: Without dead ends: 29 [2024-11-22 01:15:15,014 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-22 01:15:15,018 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 01:15:15,019 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 01:15:15,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-22 01:15:15,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-22 01:15:15,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-22 01:15:15,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2024-11-22 01:15:15,057 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 19 [2024-11-22 01:15:15,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:15:15,057 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2024-11-22 01:15:15,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 01:15:15,058 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2024-11-22 01:15:15,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-22 01:15:15,059 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:15:15,059 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:15:15,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 01:15:15,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-22 01:15:15,260 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:15:15,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:15:15,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1757085840, now seen corresponding path program 1 times [2024-11-22 01:15:15,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:15:15,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031024953] [2024-11-22 01:15:15,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:15:15,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:15:15,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:15:15,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 01:15:15,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:15:15,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031024953] [2024-11-22 01:15:15,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031024953] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 01:15:15,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 01:15:15,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-22 01:15:15,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859164009] [2024-11-22 01:15:15,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 01:15:15,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 01:15:15,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:15:15,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 01:15:15,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-22 01:15:15,655 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-22 01:15:19,737 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 [] [2024-11-22 01:15:19,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:15:19,878 INFO L93 Difference]: Finished difference Result 61 states and 89 transitions. [2024-11-22 01:15:19,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 01:15:19,880 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2024-11-22 01:15:19,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:15:19,881 INFO L225 Difference]: With dead ends: 61 [2024-11-22 01:15:19,881 INFO L226 Difference]: Without dead ends: 43 [2024-11-22 01:15:19,881 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-22 01:15:19,882 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 5 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-11-22 01:15:19,883 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 181 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 49 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2024-11-22 01:15:19,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-22 01:15:19,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-11-22 01:15:19,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-22 01:15:19,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 60 transitions. [2024-11-22 01:15:19,895 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 60 transitions. Word has length 20 [2024-11-22 01:15:19,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:15:19,895 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 60 transitions. [2024-11-22 01:15:19,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-22 01:15:19,895 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 60 transitions. [2024-11-22 01:15:19,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-22 01:15:19,896 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:15:19,896 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:15:19,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 01:15:19,896 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:15:19,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:15:19,897 INFO L85 PathProgramCache]: Analyzing trace with hash -332038773, now seen corresponding path program 1 times [2024-11-22 01:15:19,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:15:19,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521739604] [2024-11-22 01:15:19,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:15:19,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:15:19,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:15:20,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 01:15:20,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:15:20,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521739604] [2024-11-22 01:15:20,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521739604] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 01:15:20,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910837217] [2024-11-22 01:15:20,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:15:20,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:15:20,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:15:20,239 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) [2024-11-22 01:15:20,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 01:15:20,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:15:20,282 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-22 01:15:20,283 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:15:20,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 01:15:20,443 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:15:20,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 01:15:20,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910837217] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:15:20,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 01:15:20,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-22 01:15:20,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528657702] [2024-11-22 01:15:20,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 01:15:20,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-22 01:15:20,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:15:20,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-22 01:15:20,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2024-11-22 01:15:20,611 INFO L87 Difference]: Start difference. First operand 43 states and 60 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-22 01:15:21,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:15:21,413 INFO L93 Difference]: Finished difference Result 112 states and 178 transitions. [2024-11-22 01:15:21,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-22 01:15:21,418 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2024-11-22 01:15:21,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:15:21,420 INFO L225 Difference]: With dead ends: 112 [2024-11-22 01:15:21,420 INFO L226 Difference]: Without dead ends: 94 [2024-11-22 01:15:21,421 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2024-11-22 01:15:21,424 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 29 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-22 01:15:21,425 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 221 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-22 01:15:21,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-22 01:15:21,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 62. [2024-11-22 01:15:21,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 32 states have (on average 1.21875) internal successors, (39), 35 states have internal predecessors, (39), 25 states have call successors, (25), 4 states have call predecessors, (25), 4 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-22 01:15:21,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 88 transitions. [2024-11-22 01:15:21,477 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 88 transitions. Word has length 22 [2024-11-22 01:15:21,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:15:21,478 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 88 transitions. [2024-11-22 01:15:21,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-22 01:15:21,478 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 88 transitions. [2024-11-22 01:15:21,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-22 01:15:21,479 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:15:21,479 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:15:21,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-22 01:15:21,684 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-22 01:15:21,685 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:15:21,685 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:15:21,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1041809680, now seen corresponding path program 1 times [2024-11-22 01:15:21,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:15:21,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047243729] [2024-11-22 01:15:21,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:15:21,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:15:21,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 01:15:21,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2099337409] [2024-11-22 01:15:21,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:15:21,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:15:21,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:15:21,715 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) [2024-11-22 01:15:21,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 01:15:21,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:15:21,744 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-22 01:15:21,747 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:15:21,805 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-22 01:15:21,806 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 01:15:21,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:15:21,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047243729] [2024-11-22 01:15:21,806 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:15:21,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099337409] [2024-11-22 01:15:21,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099337409] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 01:15:21,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 01:15:21,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 01:15:21,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474341317] [2024-11-22 01:15:21,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 01:15:21,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 01:15:21,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:15:21,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 01:15:21,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-22 01:15:21,808 INFO L87 Difference]: Start difference. First operand 62 states and 88 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2024-11-22 01:15:21,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:15:21,919 INFO L93 Difference]: Finished difference Result 87 states and 124 transitions. [2024-11-22 01:15:21,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 01:15:21,920 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 30 [2024-11-22 01:15:21,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:15:21,921 INFO L225 Difference]: With dead ends: 87 [2024-11-22 01:15:21,922 INFO L226 Difference]: Without dead ends: 84 [2024-11-22 01:15:21,923 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-22 01:15:21,923 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 01:15:21,925 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 130 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 01:15:21,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-22 01:15:21,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2024-11-22 01:15:21,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 40 states have (on average 1.2) internal successors, (48), 42 states have internal predecessors, (48), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2024-11-22 01:15:21,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 120 transitions. [2024-11-22 01:15:21,945 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 120 transitions. Word has length 30 [2024-11-22 01:15:21,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:15:21,946 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 120 transitions. [2024-11-22 01:15:21,946 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2024-11-22 01:15:21,946 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 120 transitions. [2024-11-22 01:15:21,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-22 01:15:21,947 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:15:21,947 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:15:21,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-22 01:15:22,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:15:22,147 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:15:22,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:15:22,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1015454531, now seen corresponding path program 1 times [2024-11-22 01:15:22,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:15:22,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946692005] [2024-11-22 01:15:22,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:15:22,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:15:22,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 01:15:22,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [357607712] [2024-11-22 01:15:22,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:15:22,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:15:22,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:15:22,166 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) [2024-11-22 01:15:22,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 01:15:22,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:15:22,214 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-22 01:15:22,215 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:15:22,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 01:15:22,318 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:15:23,130 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 01:15:23,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:15:23,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946692005] [2024-11-22 01:15:23,131 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:15:23,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357607712] [2024-11-22 01:15:23,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357607712] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:15:23,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 01:15:23,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-11-22 01:15:23,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263429329] [2024-11-22 01:15:23,132 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 01:15:23,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-22 01:15:23,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:15:23,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-22 01:15:23,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-22 01:15:23,133 INFO L87 Difference]: Start difference. First operand 84 states and 120 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-22 01:15:35,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-22 01:15:38,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-22 01:15:40,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-22 01:15:44,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-22 01:15:45,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-22 01:15:50,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-22 01:15:54,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-22 01:15:58,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-22 01:16:02,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-22 01:16:06,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-22 01:16:10,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-22 01:16:14,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-22 01:16:18,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-22 01:16:22,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-22 01:16:22,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:16:22,674 INFO L93 Difference]: Finished difference Result 153 states and 223 transitions. [2024-11-22 01:16:22,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 01:16:22,675 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2024-11-22 01:16:22,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:16:22,679 INFO L225 Difference]: With dead ends: 153 [2024-11-22 01:16:22,679 INFO L226 Difference]: Without dead ends: 129 [2024-11-22 01:16:22,680 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=38, Invalid=93, Unknown=1, NotChecked=0, Total=132 [2024-11-22 01:16:22,680 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 16 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 44 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.4s IncrementalHoareTripleChecker+Time [2024-11-22 01:16:22,680 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 354 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 197 Invalid, 11 Unknown, 0 Unchecked, 51.4s Time] [2024-11-22 01:16:22,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-11-22 01:16:22,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 123. [2024-11-22 01:16:22,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 61 states have internal predecessors, (69), 55 states have call successors, (55), 9 states have call predecessors, (55), 9 states have return successors, (53), 52 states have call predecessors, (53), 53 states have call successors, (53) [2024-11-22 01:16:22,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 177 transitions. [2024-11-22 01:16:22,707 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 177 transitions. Word has length 29 [2024-11-22 01:16:22,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:16:22,707 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 177 transitions. [2024-11-22 01:16:22,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-22 01:16:22,707 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 177 transitions. [2024-11-22 01:16:22,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-22 01:16:22,708 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:16:22,708 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:16:22,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-22 01:16:22,912 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:16:22,912 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:16:22,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:16:22,913 INFO L85 PathProgramCache]: Analyzing trace with hash 142204962, now seen corresponding path program 1 times [2024-11-22 01:16:22,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:16:22,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838808866] [2024-11-22 01:16:22,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:16:22,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:16:22,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:16:23,103 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-22 01:16:23,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:16:23,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838808866] [2024-11-22 01:16:23,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838808866] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 01:16:23,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064849196] [2024-11-22 01:16:23,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:16:23,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:16:23,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:16:23,107 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) [2024-11-22 01:16:23,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 01:16:23,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:16:23,146 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-22 01:16:23,148 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:16:23,217 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-22 01:16:23,217 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:16:23,356 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-22 01:16:23,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064849196] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:16:23,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 01:16:23,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-11-22 01:16:23,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580341854] [2024-11-22 01:16:23,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 01:16:23,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-22 01:16:23,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:16:23,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-22 01:16:23,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-11-22 01:16:23,358 INFO L87 Difference]: Start difference. First operand 123 states and 177 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-22 01:16:23,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:16:23,926 INFO L93 Difference]: Finished difference Result 174 states and 249 transitions. [2024-11-22 01:16:23,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-22 01:16:23,927 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 41 [2024-11-22 01:16:23,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:16:23,928 INFO L225 Difference]: With dead ends: 174 [2024-11-22 01:16:23,928 INFO L226 Difference]: Without dead ends: 132 [2024-11-22 01:16:23,928 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2024-11-22 01:16:23,929 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 30 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-22 01:16:23,929 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 427 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-22 01:16:23,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-11-22 01:16:23,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 120. [2024-11-22 01:16:23,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 59 states have internal predecessors, (62), 55 states have call successors, (55), 9 states have call predecessors, (55), 9 states have return successors, (53), 51 states have call predecessors, (53), 53 states have call successors, (53) [2024-11-22 01:16:23,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 170 transitions. [2024-11-22 01:16:23,948 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 170 transitions. Word has length 41 [2024-11-22 01:16:23,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:16:23,949 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 170 transitions. [2024-11-22 01:16:23,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-22 01:16:23,949 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 170 transitions. [2024-11-22 01:16:23,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-22 01:16:23,952 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:16:23,952 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:16:23,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-22 01:16:24,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:16:24,153 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:16:24,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:16:24,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1168270398, now seen corresponding path program 1 times [2024-11-22 01:16:24,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:16:24,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264718440] [2024-11-22 01:16:24,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:16:24,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:16:24,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 01:16:24,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546173774] [2024-11-22 01:16:24,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:16:24,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:16:24,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:16:24,175 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:16:24,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-22 01:16:24,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:16:24,221 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-22 01:16:24,222 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:16:24,333 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-22 01:16:24,333 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:16:33,067 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-22 01:16:33,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:16:33,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264718440] [2024-11-22 01:16:33,067 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:16:33,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546173774] [2024-11-22 01:16:33,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546173774] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:16:33,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 01:16:33,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-11-22 01:16:33,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665575406] [2024-11-22 01:16:33,068 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 01:16:33,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 01:16:33,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:16:33,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 01:16:33,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-11-22 01:16:33,069 INFO L87 Difference]: Start difference. First operand 120 states and 170 transitions. Second operand has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-22 01:16:39,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-22 01:16:43,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-22 01:16:43,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:16:43,796 INFO L93 Difference]: Finished difference Result 130 states and 181 transitions. [2024-11-22 01:16:43,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 01:16:43,797 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) Word has length 56 [2024-11-22 01:16:43,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:16:43,801 INFO L225 Difference]: With dead ends: 130 [2024-11-22 01:16:43,801 INFO L226 Difference]: Without dead ends: 108 [2024-11-22 01:16:43,801 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-11-22 01:16:43,802 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 11 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 29 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2024-11-22 01:16:43,802 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 107 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 122 Invalid, 2 Unknown, 0 Unchecked, 10.7s Time] [2024-11-22 01:16:43,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-11-22 01:16:43,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2024-11-22 01:16:43,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 54 states have internal predecessors, (57), 48 states have call successors, (48), 8 states have call predecessors, (48), 8 states have return successors, (46), 45 states have call predecessors, (46), 46 states have call successors, (46) [2024-11-22 01:16:43,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 151 transitions. [2024-11-22 01:16:43,815 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 151 transitions. Word has length 56 [2024-11-22 01:16:43,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:16:43,815 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 151 transitions. [2024-11-22 01:16:43,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-22 01:16:43,816 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 151 transitions. [2024-11-22 01:16:43,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-22 01:16:43,817 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:16:43,817 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:16:43,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-22 01:16:44,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:16:44,017 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:16:44,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:16:44,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1526883210, now seen corresponding path program 1 times [2024-11-22 01:16:44,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:16:44,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873177565] [2024-11-22 01:16:44,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:16:44,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:16:44,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:16:44,743 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-22 01:16:44,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:16:44,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873177565] [2024-11-22 01:16:44,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873177565] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 01:16:44,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429323879] [2024-11-22 01:16:44,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:16:44,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:16:44,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:16:44,746 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:16:44,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 01:16:44,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:16:44,842 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-22 01:16:44,844 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:16:45,370 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-22 01:16:45,370 INFO L311 TraceCheckSpWp]: Computing backward predicates...