./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.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/egcd2-ll_valuebound100.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 f5697d76d3e5ae232d0e056ee307ac88ca38e983a94c4765bc5d51f77e79d2f7 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 13:51:07,026 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 13:51:07,083 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 13:51:07,088 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 13:51:07,088 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 13:51:07,107 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 13:51:07,108 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 13:51:07,108 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 13:51:07,108 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 13:51:07,109 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 13:51:07,109 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 13:51:07,110 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 13:51:07,110 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 13:51:07,110 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 13:51:07,110 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 13:51:07,110 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 13:51:07,110 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 13:51:07,110 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 13:51:07,111 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 13:51:07,111 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 13:51:07,111 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 13:51:07,111 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 13:51:07,111 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 13:51:07,111 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 13:51:07,111 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 13:51:07,111 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 13:51:07,111 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 13:51:07,111 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 13:51:07,111 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 13:51:07,111 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 13:51:07,112 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 13:51:07,112 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 13:51:07,112 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 13:51:07,112 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 13:51:07,112 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 13:51:07,112 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 13:51:07,112 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 13:51:07,113 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 13:51:07,113 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 13:51:07,113 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 13:51:07,113 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 13:51:07,113 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 13:51:07,113 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 13:51:07,113 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> f5697d76d3e5ae232d0e056ee307ac88ca38e983a94c4765bc5d51f77e79d2f7 [2025-03-03 13:51:07,335 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 13:51:07,340 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 13:51:07,343 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 13:51:07,344 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 13:51:07,344 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 13:51:07,346 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.c [2025-03-03 13:51:08,473 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3df0750b/9f19084e64204912a9fc8fc56649ec7e/FLAG0f2e9609d [2025-03-03 13:51:08,671 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 13:51:08,672 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.c [2025-03-03 13:51:08,680 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3df0750b/9f19084e64204912a9fc8fc56649ec7e/FLAG0f2e9609d [2025-03-03 13:51:09,035 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3df0750b/9f19084e64204912a9fc8fc56649ec7e [2025-03-03 13:51:09,037 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 13:51:09,038 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 13:51:09,041 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 13:51:09,041 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 13:51:09,044 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 13:51:09,044 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 01:51:09" (1/1) ... [2025-03-03 13:51:09,046 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f52536b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:51:09, skipping insertion in model container [2025-03-03 13:51:09,046 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 01:51:09" (1/1) ... [2025-03-03 13:51:09,056 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 13:51:09,156 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/egcd2-ll_valuebound100.c[490,503] [2025-03-03 13:51:09,174 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 13:51:09,182 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 13:51:09,189 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/egcd2-ll_valuebound100.c[490,503] [2025-03-03 13:51:09,197 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 13:51:09,208 INFO L204 MainTranslator]: Completed translation [2025-03-03 13:51:09,209 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:51:09 WrapperNode [2025-03-03 13:51:09,209 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 13:51:09,210 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 13:51:09,210 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 13:51:09,210 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 13:51:09,216 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:51:09" (1/1) ... [2025-03-03 13:51:09,221 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:51:09" (1/1) ... [2025-03-03 13:51:09,234 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 73 [2025-03-03 13:51:09,235 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 13:51:09,236 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 13:51:09,236 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 13:51:09,236 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 13:51:09,241 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:51:09" (1/1) ... [2025-03-03 13:51:09,242 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:51:09" (1/1) ... [2025-03-03 13:51:09,243 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:51:09" (1/1) ... [2025-03-03 13:51:09,258 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]. [2025-03-03 13:51:09,259 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:51:09" (1/1) ... [2025-03-03 13:51:09,259 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:51:09" (1/1) ... [2025-03-03 13:51:09,261 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:51:09" (1/1) ... [2025-03-03 13:51:09,262 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:51:09" (1/1) ... [2025-03-03 13:51:09,265 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:51:09" (1/1) ... [2025-03-03 13:51:09,265 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:51:09" (1/1) ... [2025-03-03 13:51:09,266 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 13:51:09,266 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 13:51:09,266 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 13:51:09,266 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 13:51:09,270 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:51:09" (1/1) ... [2025-03-03 13:51:09,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 13:51:09,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:09,293 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) [2025-03-03 13:51:09,296 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 [2025-03-03 13:51:09,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 13:51:09,314 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-03 13:51:09,314 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-03 13:51:09,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 13:51:09,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 13:51:09,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 13:51:09,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-03 13:51:09,314 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-03 13:51:09,352 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 13:51:09,353 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 13:51:09,494 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2025-03-03 13:51:09,495 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 13:51:09,502 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 13:51:09,503 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 13:51:09,504 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 01:51:09 BoogieIcfgContainer [2025-03-03 13:51:09,504 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 13:51:09,505 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 13:51:09,505 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 13:51:09,508 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 13:51:09,509 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 01:51:09" (1/3) ... [2025-03-03 13:51:09,509 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d1b113c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 01:51:09, skipping insertion in model container [2025-03-03 13:51:09,510 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:51:09" (2/3) ... [2025-03-03 13:51:09,510 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d1b113c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 01:51:09, skipping insertion in model container [2025-03-03 13:51:09,510 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 01:51:09" (3/3) ... [2025-03-03 13:51:09,511 INFO L128 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound100.c [2025-03-03 13:51:09,522 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 13:51:09,523 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd2-ll_valuebound100.c that has 3 procedures, 33 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-03 13:51:09,563 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 13:51:09,570 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;@356463e4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 13:51:09,572 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 13:51:09,575 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2025-03-03 13:51:09,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-03-03 13:51:09,580 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:09,581 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:09,581 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:09,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:09,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1369079279, now seen corresponding path program 1 times [2025-03-03 13:51:09,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:09,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615335999] [2025-03-03 13:51:09,591 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:09,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:09,642 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-03 13:51:09,669 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-03 13:51:09,669 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:09,670 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:09,899 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-03 13:51:09,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:09,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615335999] [2025-03-03 13:51:09,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615335999] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:51:09,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052141703] [2025-03-03 13:51:09,901 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:09,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:09,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:09,903 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) [2025-03-03 13:51:09,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-03 13:51:09,945 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-03 13:51:09,974 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-03 13:51:09,974 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:09,974 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:09,978 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-03 13:51:09,982 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:10,186 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-03 13:51:10,189 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:51:10,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052141703] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:51:10,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:51:10,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 11 [2025-03-03 13:51:10,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979013942] [2025-03-03 13:51:10,297 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:51:10,301 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-03 13:51:10,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:10,312 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-03 13:51:10,312 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2025-03-03 13:51:10,313 INFO L87 Difference]: Start difference. First operand has 33 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 11 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2025-03-03 13:51:10,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:10,510 INFO L93 Difference]: Finished difference Result 74 states and 127 transitions. [2025-03-03 13:51:10,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 13:51:10,513 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 39 [2025-03-03 13:51:10,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:10,517 INFO L225 Difference]: With dead ends: 74 [2025-03-03 13:51:10,519 INFO L226 Difference]: Without dead ends: 40 [2025-03-03 13:51:10,521 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2025-03-03 13:51:10,523 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 29 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:10,525 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 182 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:51:10,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2025-03-03 13:51:10,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2025-03-03 13:51:10,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2025-03-03 13:51:10,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 54 transitions. [2025-03-03 13:51:10,552 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 54 transitions. Word has length 39 [2025-03-03 13:51:10,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:10,553 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 54 transitions. [2025-03-03 13:51:10,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2025-03-03 13:51:10,553 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 54 transitions. [2025-03-03 13:51:10,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-03-03 13:51:10,555 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:10,555 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:10,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-03 13:51:10,759 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 [2025-03-03 13:51:10,759 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:10,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:10,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1371164649, now seen corresponding path program 1 times [2025-03-03 13:51:10,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:10,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944053500] [2025-03-03 13:51:10,760 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:10,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:10,767 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-03 13:51:10,780 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-03 13:51:10,780 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:10,780 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:51:10,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [367704640] [2025-03-03 13:51:10,782 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:10,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:10,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:10,784 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) [2025-03-03 13:51:10,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-03 13:51:10,812 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-03 13:51:10,823 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-03 13:51:10,823 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:10,823 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:10,824 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-03 13:51:10,825 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:10,857 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-03-03 13:51:10,857 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 13:51:10,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:10,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944053500] [2025-03-03 13:51:10,858 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:51:10,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367704640] [2025-03-03 13:51:10,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367704640] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:51:10,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:51:10,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:51:10,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989726464] [2025-03-03 13:51:10,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:51:10,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:51:10,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:10,859 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:51:10,859 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:51:10,860 INFO L87 Difference]: Start difference. First operand 39 states and 54 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-03 13:51:10,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:10,898 INFO L93 Difference]: Finished difference Result 56 states and 80 transitions. [2025-03-03 13:51:10,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:51:10,899 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2025-03-03 13:51:10,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:10,899 INFO L225 Difference]: With dead ends: 56 [2025-03-03 13:51:10,900 INFO L226 Difference]: Without dead ends: 54 [2025-03-03 13:51:10,900 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:51:10,900 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:10,901 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 128 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:51:10,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2025-03-03 13:51:10,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2025-03-03 13:51:10,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 25 states have internal predecessors, (26), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2025-03-03 13:51:10,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2025-03-03 13:51:10,912 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 39 [2025-03-03 13:51:10,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:10,912 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2025-03-03 13:51:10,912 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-03 13:51:10,912 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2025-03-03 13:51:10,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-03 13:51:10,913 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:10,913 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2025-03-03 13:51:10,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-03 13:51:11,119 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,SelfDestructingSolverStorable1 [2025-03-03 13:51:11,119 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:11,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:11,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1302690525, now seen corresponding path program 1 times [2025-03-03 13:51:11,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:11,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424452251] [2025-03-03 13:51:11,120 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:11,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:11,124 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-03 13:51:11,138 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-03 13:51:11,141 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:11,141 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:51:11,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [188661566] [2025-03-03 13:51:11,142 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:11,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:11,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:11,144 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) [2025-03-03 13:51:11,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-03 13:51:11,171 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-03 13:51:11,184 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-03 13:51:11,185 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:11,185 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:11,185 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-03 13:51:11,186 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:11,239 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-03-03 13:51:11,239 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 13:51:11,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:11,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424452251] [2025-03-03 13:51:11,239 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:51:11,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188661566] [2025-03-03 13:51:11,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188661566] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:51:11,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:51:11,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:51:11,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368636855] [2025-03-03 13:51:11,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:51:11,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:51:11,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:11,240 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:51:11,240 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:51:11,240 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-03 13:51:11,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:11,293 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2025-03-03 13:51:11,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:51:11,294 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2025-03-03 13:51:11,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:11,295 INFO L225 Difference]: With dead ends: 52 [2025-03-03 13:51:11,296 INFO L226 Difference]: Without dead ends: 50 [2025-03-03 13:51:11,296 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:51:11,297 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:11,297 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 138 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:51:11,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2025-03-03 13:51:11,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2025-03-03 13:51:11,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 25 states have (on average 1.16) internal successors, (29), 28 states have internal predecessors, (29), 18 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2025-03-03 13:51:11,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2025-03-03 13:51:11,304 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 44 [2025-03-03 13:51:11,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:11,305 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2025-03-03 13:51:11,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-03 13:51:11,305 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2025-03-03 13:51:11,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-03-03 13:51:11,305 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:11,306 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 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] [2025-03-03 13:51:11,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-03 13:51:11,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:11,506 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:11,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:11,507 INFO L85 PathProgramCache]: Analyzing trace with hash 145105565, now seen corresponding path program 1 times [2025-03-03 13:51:11,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:11,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851107721] [2025-03-03 13:51:11,507 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:11,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:11,516 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-03-03 13:51:11,535 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-03-03 13:51:11,536 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:11,536 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:51:11,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2037100494] [2025-03-03 13:51:11,537 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:11,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:11,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:11,540 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) [2025-03-03 13:51:11,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-03 13:51:11,570 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-03-03 13:51:11,589 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-03-03 13:51:11,590 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:11,590 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:11,590 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-03 13:51:11,592 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:11,690 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2025-03-03 13:51:11,691 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 13:51:11,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:11,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851107721] [2025-03-03 13:51:11,691 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:51:11,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037100494] [2025-03-03 13:51:11,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037100494] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:51:11,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:51:11,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:51:11,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870938732] [2025-03-03 13:51:11,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:51:11,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:51:11,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:11,692 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:51:11,693 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:51:11,693 INFO L87 Difference]: Start difference. First operand 49 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-03-03 13:51:11,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:11,742 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2025-03-03 13:51:11,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:51:11,743 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 54 [2025-03-03 13:51:11,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:11,745 INFO L225 Difference]: With dead ends: 56 [2025-03-03 13:51:11,745 INFO L226 Difference]: Without dead ends: 54 [2025-03-03 13:51:11,745 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:51:11,745 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 5 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:11,745 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 125 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:51:11,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2025-03-03 13:51:11,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2025-03-03 13:51:11,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2025-03-03 13:51:11,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2025-03-03 13:51:11,758 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 54 [2025-03-03 13:51:11,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:11,758 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2025-03-03 13:51:11,758 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-03-03 13:51:11,758 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2025-03-03 13:51:11,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2025-03-03 13:51:11,758 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:11,759 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 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] [2025-03-03 13:51:11,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-03 13:51:11,959 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:11,959 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:11,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:11,960 INFO L85 PathProgramCache]: Analyzing trace with hash 63346894, now seen corresponding path program 1 times [2025-03-03 13:51:11,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:11,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573131442] [2025-03-03 13:51:11,960 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:11,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:11,964 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 60 statements into 1 equivalence classes. [2025-03-03 13:51:11,973 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 60 of 60 statements. [2025-03-03 13:51:11,973 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:11,974 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:51:11,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1234500470] [2025-03-03 13:51:11,975 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:11,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:11,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:11,976 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) [2025-03-03 13:51:11,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-03 13:51:12,003 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 60 statements into 1 equivalence classes. [2025-03-03 13:51:12,019 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 60 of 60 statements. [2025-03-03 13:51:12,019 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:12,019 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:12,020 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-03 13:51:12,022 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:12,062 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-03-03 13:51:12,062 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:51:12,133 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-03-03 13:51:12,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:12,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573131442] [2025-03-03 13:51:12,134 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:51:12,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234500470] [2025-03-03 13:51:12,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234500470] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:51:12,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:51:12,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2025-03-03 13:51:12,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742627889] [2025-03-03 13:51:12,134 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:51:12,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-03 13:51:12,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:12,134 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-03 13:51:12,134 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-03 13:51:12,135 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 7 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2025-03-03 13:51:12,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:12,236 INFO L93 Difference]: Finished difference Result 79 states and 110 transitions. [2025-03-03 13:51:12,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-03 13:51:12,236 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2025-03-03 13:51:12,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:12,237 INFO L225 Difference]: With dead ends: 79 [2025-03-03 13:51:12,237 INFO L226 Difference]: Without dead ends: 77 [2025-03-03 13:51:12,237 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-03-03 13:51:12,238 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:12,238 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 144 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:51:12,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2025-03-03 13:51:12,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 51. [2025-03-03 13:51:12,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2025-03-03 13:51:12,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2025-03-03 13:51:12,252 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 60 [2025-03-03 13:51:12,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:12,252 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2025-03-03 13:51:12,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2025-03-03 13:51:12,252 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2025-03-03 13:51:12,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2025-03-03 13:51:12,252 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:12,252 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:12,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-03 13:51:12,453 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:12,453 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:12,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:12,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1928783807, now seen corresponding path program 1 times [2025-03-03 13:51:12,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:12,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273122613] [2025-03-03 13:51:12,455 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:12,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:12,461 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 62 statements into 1 equivalence classes. [2025-03-03 13:51:12,472 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 62 of 62 statements. [2025-03-03 13:51:12,475 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:12,476 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:12,652 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2025-03-03 13:51:12,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:12,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273122613] [2025-03-03 13:51:12,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273122613] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:51:12,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835323125] [2025-03-03 13:51:12,653 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:12,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:12,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:12,658 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) [2025-03-03 13:51:12,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-03 13:51:12,682 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 62 statements into 1 equivalence classes. [2025-03-03 13:51:12,698 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 62 of 62 statements. [2025-03-03 13:51:12,698 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:12,698 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:12,699 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-03 13:51:12,700 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:12,750 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2025-03-03 13:51:12,750 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:51:12,834 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2025-03-03 13:51:12,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835323125] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:51:12,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:51:12,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2025-03-03 13:51:12,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466037585] [2025-03-03 13:51:12,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:51:12,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-03 13:51:12,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:12,835 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-03 13:51:12,835 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2025-03-03 13:51:12,835 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2025-03-03 13:51:12,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:12,971 INFO L93 Difference]: Finished difference Result 91 states and 131 transitions. [2025-03-03 13:51:12,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 13:51:12,972 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 62 [2025-03-03 13:51:12,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:12,973 INFO L225 Difference]: With dead ends: 91 [2025-03-03 13:51:12,973 INFO L226 Difference]: Without dead ends: 83 [2025-03-03 13:51:12,973 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 116 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2025-03-03 13:51:12,974 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 25 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:12,974 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 239 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:51:12,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2025-03-03 13:51:13,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 75. [2025-03-03 13:51:13,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2025-03-03 13:51:13,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 108 transitions. [2025-03-03 13:51:13,008 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 108 transitions. Word has length 62 [2025-03-03 13:51:13,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:13,009 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 108 transitions. [2025-03-03 13:51:13,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2025-03-03 13:51:13,009 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 108 transitions. [2025-03-03 13:51:13,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2025-03-03 13:51:13,010 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:13,010 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:13,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-03 13:51:13,210 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:13,211 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:13,211 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:13,211 INFO L85 PathProgramCache]: Analyzing trace with hash 898806541, now seen corresponding path program 1 times [2025-03-03 13:51:13,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:13,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667628620] [2025-03-03 13:51:13,211 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:13,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:13,216 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 67 statements into 1 equivalence classes. [2025-03-03 13:51:13,233 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 67 of 67 statements. [2025-03-03 13:51:13,234 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:13,234 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:51:13,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946641455] [2025-03-03 13:51:13,237 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:13,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:13,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:13,239 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) [2025-03-03 13:51:13,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-03 13:51:13,262 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 67 statements into 1 equivalence classes. [2025-03-03 13:51:13,278 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 67 of 67 statements. [2025-03-03 13:51:13,278 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:13,278 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:13,279 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-03 13:51:13,281 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:13,382 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2025-03-03 13:51:13,382 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:51:13,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:13,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667628620] [2025-03-03 13:51:13,419 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:51:13,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946641455] [2025-03-03 13:51:13,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946641455] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:51:13,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:51:13,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2025-03-03 13:51:13,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378915636] [2025-03-03 13:51:13,420 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:51:13,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-03 13:51:13,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:13,420 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-03 13:51:13,420 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-03-03 13:51:13,420 INFO L87 Difference]: Start difference. First operand 75 states and 108 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2025-03-03 13:51:13,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:13,517 INFO L93 Difference]: Finished difference Result 105 states and 154 transitions. [2025-03-03 13:51:13,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 13:51:13,518 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 67 [2025-03-03 13:51:13,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:13,521 INFO L225 Difference]: With dead ends: 105 [2025-03-03 13:51:13,521 INFO L226 Difference]: Without dead ends: 102 [2025-03-03 13:51:13,521 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-03 13:51:13,522 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 7 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:13,523 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 182 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:51:13,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2025-03-03 13:51:13,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2025-03-03 13:51:13,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 48 states have internal predecessors, (59), 45 states have call successors, (45), 7 states have call predecessors, (45), 7 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2025-03-03 13:51:13,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 147 transitions. [2025-03-03 13:51:13,553 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 147 transitions. Word has length 67 [2025-03-03 13:51:13,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:13,553 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 147 transitions. [2025-03-03 13:51:13,554 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2025-03-03 13:51:13,554 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 147 transitions. [2025-03-03 13:51:13,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2025-03-03 13:51:13,555 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:13,555 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 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] [2025-03-03 13:51:13,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-03 13:51:13,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:13,755 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:13,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:13,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1038374521, now seen corresponding path program 2 times [2025-03-03 13:51:13,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:13,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711380934] [2025-03-03 13:51:13,756 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:51:13,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:13,762 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 72 statements into 2 equivalence classes. [2025-03-03 13:51:13,772 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 72 of 72 statements. [2025-03-03 13:51:13,772 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:51:13,772 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:51:13,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1688147407] [2025-03-03 13:51:13,773 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:51:13,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:13,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:13,775 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:51:13,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-03 13:51:13,802 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 72 statements into 2 equivalence classes. [2025-03-03 13:51:13,821 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 72 of 72 statements. [2025-03-03 13:51:13,821 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:51:13,821 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:13,822 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-03 13:51:13,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:13,962 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2025-03-03 13:51:13,963 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:51:14,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:14,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711380934] [2025-03-03 13:51:14,004 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:51:14,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688147407] [2025-03-03 13:51:14,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688147407] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:51:14,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:51:14,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2025-03-03 13:51:14,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385037648] [2025-03-03 13:51:14,005 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:51:14,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-03 13:51:14,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:14,006 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-03 13:51:14,006 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-03-03 13:51:14,006 INFO L87 Difference]: Start difference. First operand 99 states and 147 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-03-03 13:51:14,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:14,154 INFO L93 Difference]: Finished difference Result 111 states and 157 transitions. [2025-03-03 13:51:14,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-03 13:51:14,154 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 72 [2025-03-03 13:51:14,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:14,156 INFO L225 Difference]: With dead ends: 111 [2025-03-03 13:51:14,156 INFO L226 Difference]: Without dead ends: 109 [2025-03-03 13:51:14,156 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-03-03 13:51:14,157 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 10 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:14,157 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 196 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:51:14,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2025-03-03 13:51:14,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2025-03-03 13:51:14,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 52 states have (on average 1.25) internal successors, (65), 54 states have internal predecessors, (65), 45 states have call successors, (45), 9 states have call predecessors, (45), 9 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2025-03-03 13:51:14,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 153 transitions. [2025-03-03 13:51:14,185 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 153 transitions. Word has length 72 [2025-03-03 13:51:14,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:14,185 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 153 transitions. [2025-03-03 13:51:14,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-03-03 13:51:14,188 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 153 transitions. [2025-03-03 13:51:14,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2025-03-03 13:51:14,189 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:14,189 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:14,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-03 13:51:14,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-03-03 13:51:14,394 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:14,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:14,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1638998323, now seen corresponding path program 3 times [2025-03-03 13:51:14,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:14,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333653026] [2025-03-03 13:51:14,395 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:51:14,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:14,404 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 77 statements into 6 equivalence classes. [2025-03-03 13:51:14,443 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 77 of 77 statements. [2025-03-03 13:51:14,444 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-03 13:51:14,444 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:51:14,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1280033411] [2025-03-03 13:51:14,445 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:51:14,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:14,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:14,447 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:51:14,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-03 13:51:14,475 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 77 statements into 6 equivalence classes. [2025-03-03 13:51:14,497 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 46 of 77 statements. [2025-03-03 13:51:14,497 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-03 13:51:14,497 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:14,498 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-03-03 13:51:14,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:15,248 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 43 proven. 18 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2025-03-03 13:51:15,248 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:51:15,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:15,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333653026] [2025-03-03 13:51:15,745 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:51:15,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280033411] [2025-03-03 13:51:15,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280033411] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:51:15,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:51:15,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2025-03-03 13:51:15,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306696963] [2025-03-03 13:51:15,745 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:51:15,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-03 13:51:15,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:15,746 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-03 13:51:15,746 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2025-03-03 13:51:15,746 INFO L87 Difference]: Start difference. First operand 107 states and 153 transitions. Second operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2025-03-03 13:51:16,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:16,050 INFO L93 Difference]: Finished difference Result 115 states and 160 transitions. [2025-03-03 13:51:16,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-03 13:51:16,050 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 77 [2025-03-03 13:51:16,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:16,051 INFO L225 Difference]: With dead ends: 115 [2025-03-03 13:51:16,052 INFO L226 Difference]: Without dead ends: 113 [2025-03-03 13:51:16,052 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2025-03-03 13:51:16,052 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 20 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:16,053 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 228 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 13:51:16,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2025-03-03 13:51:16,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2025-03-03 13:51:16,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 57 states have internal predecessors, (68), 45 states have call successors, (45), 10 states have call predecessors, (45), 10 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2025-03-03 13:51:16,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 156 transitions. [2025-03-03 13:51:16,065 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 156 transitions. Word has length 77 [2025-03-03 13:51:16,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:16,066 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 156 transitions. [2025-03-03 13:51:16,066 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2025-03-03 13:51:16,066 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 156 transitions. [2025-03-03 13:51:16,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2025-03-03 13:51:16,067 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:16,067 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:16,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-03 13:51:16,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:16,269 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:16,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:16,269 INFO L85 PathProgramCache]: Analyzing trace with hash 285109562, now seen corresponding path program 1 times [2025-03-03 13:51:16,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:16,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217988407] [2025-03-03 13:51:16,269 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:16,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:16,274 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 83 statements into 1 equivalence classes. [2025-03-03 13:51:16,288 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 83 of 83 statements. [2025-03-03 13:51:16,288 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:16,288 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:51:16,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [856461599] [2025-03-03 13:51:16,289 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:16,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:16,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:16,310 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:51:16,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-03 13:51:16,336 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 83 statements into 1 equivalence classes. [2025-03-03 13:51:16,355 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 83 of 83 statements. [2025-03-03 13:51:16,355 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:16,355 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:16,356 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-03-03 13:51:16,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:16,695 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2025-03-03 13:51:16,696 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:51:16,950 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2025-03-03 13:51:16,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:16,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217988407] [2025-03-03 13:51:16,950 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:51:16,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856461599] [2025-03-03 13:51:16,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856461599] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:51:16,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:51:16,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2025-03-03 13:51:16,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459496213] [2025-03-03 13:51:16,951 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:51:16,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-03 13:51:16,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:16,951 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-03 13:51:16,952 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2025-03-03 13:51:16,952 INFO L87 Difference]: Start difference. First operand 111 states and 156 transitions. Second operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2025-03-03 13:51:18,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:18,235 INFO L93 Difference]: Finished difference Result 195 states and 303 transitions. [2025-03-03 13:51:18,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-03 13:51:18,236 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 83 [2025-03-03 13:51:18,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:18,238 INFO L225 Difference]: With dead ends: 195 [2025-03-03 13:51:18,238 INFO L226 Difference]: Without dead ends: 191 [2025-03-03 13:51:18,239 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2025-03-03 13:51:18,239 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 59 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:18,239 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 387 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-03-03 13:51:18,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2025-03-03 13:51:18,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 188. [2025-03-03 13:51:18,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 81 states have (on average 1.3333333333333333) internal successors, (108), 84 states have internal predecessors, (108), 94 states have call successors, (94), 12 states have call predecessors, (94), 12 states have return successors, (92), 91 states have call predecessors, (92), 92 states have call successors, (92) [2025-03-03 13:51:18,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 294 transitions. [2025-03-03 13:51:18,292 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 294 transitions. Word has length 83 [2025-03-03 13:51:18,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:18,292 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 294 transitions. [2025-03-03 13:51:18,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2025-03-03 13:51:18,292 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 294 transitions. [2025-03-03 13:51:18,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2025-03-03 13:51:18,294 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:18,294 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:18,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-03 13:51:18,498 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-03 13:51:18,498 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:18,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:18,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1251034333, now seen corresponding path program 4 times [2025-03-03 13:51:18,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:18,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087933167] [2025-03-03 13:51:18,499 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:51:18,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:18,504 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 90 statements into 2 equivalence classes. [2025-03-03 13:51:18,513 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 83 of 90 statements. [2025-03-03 13:51:18,513 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 13:51:18,513 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:18,578 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2025-03-03 13:51:18,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:18,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087933167] [2025-03-03 13:51:18,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087933167] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:51:18,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:51:18,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:51:18,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386308188] [2025-03-03 13:51:18,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:51:18,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:51:18,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:18,580 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:51:18,580 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:51:18,581 INFO L87 Difference]: Start difference. First operand 188 states and 294 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2025-03-03 13:51:18,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:18,656 INFO L93 Difference]: Finished difference Result 233 states and 362 transitions. [2025-03-03 13:51:18,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 13:51:18,656 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 90 [2025-03-03 13:51:18,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:18,657 INFO L225 Difference]: With dead ends: 233 [2025-03-03 13:51:18,658 INFO L226 Difference]: Without dead ends: 171 [2025-03-03 13:51:18,659 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-03-03 13:51:18,659 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 4 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:18,660 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 157 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:51:18,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2025-03-03 13:51:18,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 162. [2025-03-03 13:51:18,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 74 states have internal predecessors, (88), 78 states have call successors, (78), 12 states have call predecessors, (78), 12 states have return successors, (76), 75 states have call predecessors, (76), 76 states have call successors, (76) [2025-03-03 13:51:18,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 242 transitions. [2025-03-03 13:51:18,698 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 242 transitions. Word has length 90 [2025-03-03 13:51:18,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:18,699 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 242 transitions. [2025-03-03 13:51:18,699 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2025-03-03 13:51:18,699 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 242 transitions. [2025-03-03 13:51:18,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2025-03-03 13:51:18,700 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:18,700 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:18,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-03-03 13:51:18,700 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:18,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:18,700 INFO L85 PathProgramCache]: Analyzing trace with hash 2059555826, now seen corresponding path program 1 times [2025-03-03 13:51:18,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:18,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634502570] [2025-03-03 13:51:18,701 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:18,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:18,705 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 98 statements into 1 equivalence classes. [2025-03-03 13:51:18,723 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 98 of 98 statements. [2025-03-03 13:51:18,723 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:18,723 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:51:18,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [96206844] [2025-03-03 13:51:18,727 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:18,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:18,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:18,730 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:51:18,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-03 13:51:18,756 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 98 statements into 1 equivalence classes. [2025-03-03 13:51:18,787 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 98 of 98 statements. [2025-03-03 13:51:18,787 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:18,787 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:18,788 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-03-03 13:51:18,790 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:19,769 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 57 proven. 24 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2025-03-03 13:51:19,769 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:51:20,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:20,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634502570] [2025-03-03 13:51:20,200 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:51:20,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96206844] [2025-03-03 13:51:20,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96206844] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:51:20,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:51:20,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2025-03-03 13:51:20,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283131222] [2025-03-03 13:51:20,200 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:51:20,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-03 13:51:20,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:20,201 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-03 13:51:20,201 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2025-03-03 13:51:20,201 INFO L87 Difference]: Start difference. First operand 162 states and 242 transitions. Second operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2025-03-03 13:51:20,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:20,892 INFO L93 Difference]: Finished difference Result 174 states and 252 transitions. [2025-03-03 13:51:20,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-03 13:51:20,892 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 98 [2025-03-03 13:51:20,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:20,893 INFO L225 Difference]: With dead ends: 174 [2025-03-03 13:51:20,894 INFO L226 Difference]: Without dead ends: 172 [2025-03-03 13:51:20,894 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2025-03-03 13:51:20,894 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 23 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:20,894 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 220 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-03 13:51:20,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2025-03-03 13:51:20,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2025-03-03 13:51:20,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 77 states have (on average 1.2207792207792207) internal successors, (94), 80 states have internal predecessors, (94), 78 states have call successors, (78), 14 states have call predecessors, (78), 14 states have return successors, (76), 75 states have call predecessors, (76), 76 states have call successors, (76) [2025-03-03 13:51:20,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 248 transitions. [2025-03-03 13:51:20,926 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 248 transitions. Word has length 98 [2025-03-03 13:51:20,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:20,926 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 248 transitions. [2025-03-03 13:51:20,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2025-03-03 13:51:20,926 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 248 transitions. [2025-03-03 13:51:20,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2025-03-03 13:51:20,927 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:20,927 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:20,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-03 13:51:21,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-03 13:51:21,127 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:21,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:21,128 INFO L85 PathProgramCache]: Analyzing trace with hash 541940060, now seen corresponding path program 1 times [2025-03-03 13:51:21,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:21,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913106203] [2025-03-03 13:51:21,128 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:21,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:21,132 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 111 statements into 1 equivalence classes. [2025-03-03 13:51:21,139 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 111 of 111 statements. [2025-03-03 13:51:21,139 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:21,139 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:21,224 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 38 proven. 7 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2025-03-03 13:51:21,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:21,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913106203] [2025-03-03 13:51:21,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913106203] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:51:21,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180186504] [2025-03-03 13:51:21,224 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:21,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:21,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:21,227 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:51:21,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-03 13:51:21,253 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 111 statements into 1 equivalence classes. [2025-03-03 13:51:21,275 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 111 of 111 statements. [2025-03-03 13:51:21,275 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:21,275 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:21,276 INFO L256 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-03 13:51:21,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:21,296 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 84 proven. 7 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2025-03-03 13:51:21,297 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:51:21,362 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 38 proven. 7 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2025-03-03 13:51:21,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180186504] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:51:21,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:51:21,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2025-03-03 13:51:21,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41675257] [2025-03-03 13:51:21,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:51:21,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-03 13:51:21,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:21,363 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-03 13:51:21,364 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-03 13:51:21,364 INFO L87 Difference]: Start difference. First operand 170 states and 248 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2025-03-03 13:51:21,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:21,510 INFO L93 Difference]: Finished difference Result 197 states and 287 transitions. [2025-03-03 13:51:21,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-03 13:51:21,510 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 111 [2025-03-03 13:51:21,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:21,511 INFO L225 Difference]: With dead ends: 197 [2025-03-03 13:51:21,512 INFO L226 Difference]: Without dead ends: 185 [2025-03-03 13:51:21,512 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 219 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2025-03-03 13:51:21,512 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 11 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:21,512 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 292 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:51:21,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2025-03-03 13:51:21,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 169. [2025-03-03 13:51:21,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 77 states have (on average 1.2077922077922079) internal successors, (93), 79 states have internal predecessors, (93), 77 states have call successors, (77), 14 states have call predecessors, (77), 14 states have return successors, (75), 75 states have call predecessors, (75), 75 states have call successors, (75) [2025-03-03 13:51:21,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 245 transitions. [2025-03-03 13:51:21,544 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 245 transitions. Word has length 111 [2025-03-03 13:51:21,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:21,544 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 245 transitions. [2025-03-03 13:51:21,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2025-03-03 13:51:21,544 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 245 transitions. [2025-03-03 13:51:21,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2025-03-03 13:51:21,545 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:21,545 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:21,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-03 13:51:21,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-03 13:51:21,749 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:21,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:21,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1418194270, now seen corresponding path program 2 times [2025-03-03 13:51:21,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:21,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368821222] [2025-03-03 13:51:21,749 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:51:21,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:21,753 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 111 statements into 2 equivalence classes. [2025-03-03 13:51:21,770 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 111 of 111 statements. [2025-03-03 13:51:21,770 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:51:21,770 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:51:21,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [277792047] [2025-03-03 13:51:21,772 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:51:21,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:21,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:21,774 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:51:21,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-03 13:51:21,802 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 111 statements into 2 equivalence classes. [2025-03-03 13:51:21,824 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 111 of 111 statements. [2025-03-03 13:51:21,824 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:51:21,824 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:21,825 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 52 conjuncts are in the unsatisfiable core [2025-03-03 13:51:21,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:22,194 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 61 proven. 41 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2025-03-03 13:51:22,194 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:51:22,329 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 68 proven. 7 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2025-03-03 13:51:22,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:22,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368821222] [2025-03-03 13:51:22,329 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:51:22,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277792047] [2025-03-03 13:51:22,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277792047] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:51:22,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:51:22,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 22 [2025-03-03 13:51:22,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408094995] [2025-03-03 13:51:22,329 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:51:22,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-03 13:51:22,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:22,330 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-03 13:51:22,330 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2025-03-03 13:51:22,330 INFO L87 Difference]: Start difference. First operand 169 states and 245 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 19 states have internal predecessors, (39), 9 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2025-03-03 13:51:23,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:23,241 INFO L93 Difference]: Finished difference Result 195 states and 284 transitions. [2025-03-03 13:51:23,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-03 13:51:23,242 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 19 states have internal predecessors, (39), 9 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) Word has length 111 [2025-03-03 13:51:23,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:23,246 INFO L225 Difference]: With dead ends: 195 [2025-03-03 13:51:23,246 INFO L226 Difference]: Without dead ends: 192 [2025-03-03 13:51:23,246 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2025-03-03 13:51:23,247 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 44 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:23,247 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 309 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-03 13:51:23,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2025-03-03 13:51:23,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 171. [2025-03-03 13:51:23,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 80 states have (on average 1.2) internal successors, (96), 81 states have internal predecessors, (96), 75 states have call successors, (75), 15 states have call predecessors, (75), 15 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2025-03-03 13:51:23,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 245 transitions. [2025-03-03 13:51:23,286 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 245 transitions. Word has length 111 [2025-03-03 13:51:23,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:23,287 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 245 transitions. [2025-03-03 13:51:23,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 19 states have internal predecessors, (39), 9 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2025-03-03 13:51:23,287 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 245 transitions. [2025-03-03 13:51:23,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2025-03-03 13:51:23,287 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:23,288 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:23,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-03 13:51:23,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-03 13:51:23,488 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:23,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:23,488 INFO L85 PathProgramCache]: Analyzing trace with hash 2070022489, now seen corresponding path program 3 times [2025-03-03 13:51:23,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:23,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722608350] [2025-03-03 13:51:23,489 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:51:23,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:23,494 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 114 statements into 10 equivalence classes. [2025-03-03 13:51:23,513 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 114 of 114 statements. [2025-03-03 13:51:23,513 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-03 13:51:23,513 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:51:23,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1582983652] [2025-03-03 13:51:23,514 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:51:23,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:23,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:23,516 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:51:23,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-03 13:51:23,544 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 114 statements into 10 equivalence classes. [2025-03-03 13:51:23,562 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 67 of 114 statements. [2025-03-03 13:51:23,562 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-03 13:51:23,562 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:23,563 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-03-03 13:51:23,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:23,799 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 63 proven. 37 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2025-03-03 13:51:23,800 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:51:23,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:23,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722608350] [2025-03-03 13:51:23,873 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:51:23,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582983652] [2025-03-03 13:51:23,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582983652] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:51:23,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:51:23,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2025-03-03 13:51:23,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688024790] [2025-03-03 13:51:23,873 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:51:23,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-03 13:51:23,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:23,874 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-03 13:51:23,874 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2025-03-03 13:51:23,874 INFO L87 Difference]: Start difference. First operand 171 states and 245 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2025-03-03 13:51:24,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:24,030 INFO L93 Difference]: Finished difference Result 187 states and 258 transitions. [2025-03-03 13:51:24,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-03 13:51:24,030 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 114 [2025-03-03 13:51:24,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:24,035 INFO L225 Difference]: With dead ends: 187 [2025-03-03 13:51:24,035 INFO L226 Difference]: Without dead ends: 185 [2025-03-03 13:51:24,035 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2025-03-03 13:51:24,035 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 7 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:24,035 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 172 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:51:24,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2025-03-03 13:51:24,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2025-03-03 13:51:24,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 89 states have (on average 1.1797752808988764) internal successors, (105), 90 states have internal predecessors, (105), 75 states have call successors, (75), 18 states have call predecessors, (75), 18 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2025-03-03 13:51:24,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 254 transitions. [2025-03-03 13:51:24,071 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 254 transitions. Word has length 114 [2025-03-03 13:51:24,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:24,071 INFO L471 AbstractCegarLoop]: Abstraction has 183 states and 254 transitions. [2025-03-03 13:51:24,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2025-03-03 13:51:24,071 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 254 transitions. [2025-03-03 13:51:24,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2025-03-03 13:51:24,072 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:24,072 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:24,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-03 13:51:24,276 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:24,276 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:24,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:24,276 INFO L85 PathProgramCache]: Analyzing trace with hash -909874172, now seen corresponding path program 4 times [2025-03-03 13:51:24,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:24,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237087699] [2025-03-03 13:51:24,276 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:51:24,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:24,280 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 116 statements into 2 equivalence classes. [2025-03-03 13:51:24,298 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 116 of 116 statements. [2025-03-03 13:51:24,298 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:51:24,298 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:51:24,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2098005335] [2025-03-03 13:51:24,299 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:51:24,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:24,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:24,301 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:51:24,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-03 13:51:24,328 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 116 statements into 2 equivalence classes. [2025-03-03 13:51:24,359 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 109 of 116 statements. [2025-03-03 13:51:24,359 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 13:51:24,359 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:24,361 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-03-03 13:51:24,363 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:24,760 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 57 proven. 38 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2025-03-03 13:51:24,761 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:51:24,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:24,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237087699] [2025-03-03 13:51:24,898 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:51:24,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098005335] [2025-03-03 13:51:24,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098005335] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:51:24,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:51:24,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2025-03-03 13:51:24,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28537791] [2025-03-03 13:51:24,898 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:51:24,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-03 13:51:24,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:24,899 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-03 13:51:24,899 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2025-03-03 13:51:24,899 INFO L87 Difference]: Start difference. First operand 183 states and 254 transitions. Second operand has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2025-03-03 13:51:25,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:25,329 INFO L93 Difference]: Finished difference Result 221 states and 302 transitions. [2025-03-03 13:51:25,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-03 13:51:25,330 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 116 [2025-03-03 13:51:25,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:25,331 INFO L225 Difference]: With dead ends: 221 [2025-03-03 13:51:25,331 INFO L226 Difference]: Without dead ends: 219 [2025-03-03 13:51:25,331 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2025-03-03 13:51:25,332 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 17 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:25,332 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 428 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 13:51:25,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2025-03-03 13:51:25,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 216. [2025-03-03 13:51:25,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 106 states have (on average 1.169811320754717) internal successors, (124), 107 states have internal predecessors, (124), 87 states have call successors, (87), 22 states have call predecessors, (87), 22 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2025-03-03 13:51:25,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 297 transitions. [2025-03-03 13:51:25,395 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 297 transitions. Word has length 116 [2025-03-03 13:51:25,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:25,395 INFO L471 AbstractCegarLoop]: Abstraction has 216 states and 297 transitions. [2025-03-03 13:51:25,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2025-03-03 13:51:25,395 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 297 transitions. [2025-03-03 13:51:25,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2025-03-03 13:51:25,398 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:25,398 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:25,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-03 13:51:25,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-03 13:51:25,603 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:25,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:25,604 INFO L85 PathProgramCache]: Analyzing trace with hash -2083653651, now seen corresponding path program 5 times [2025-03-03 13:51:25,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:25,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401433167] [2025-03-03 13:51:25,604 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:51:25,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:25,608 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 119 statements into 10 equivalence classes. [2025-03-03 13:51:25,623 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) and asserted 119 of 119 statements. [2025-03-03 13:51:25,623 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2025-03-03 13:51:25,623 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:51:25,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2013507904] [2025-03-03 13:51:25,624 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:51:25,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:25,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:25,626 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:51:25,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-03 13:51:25,657 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 119 statements into 10 equivalence classes. [2025-03-03 13:51:25,688 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) and asserted 119 of 119 statements. [2025-03-03 13:51:25,688 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2025-03-03 13:51:25,688 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:25,689 INFO L256 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-03-03 13:51:25,691 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:26,355 INFO L134 CoverageAnalysis]: Checked inductivity of 538 backedges. 76 proven. 60 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2025-03-03 13:51:26,355 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:51:26,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:26,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401433167] [2025-03-03 13:51:26,456 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:51:26,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013507904] [2025-03-03 13:51:26,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013507904] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:51:26,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:51:26,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2025-03-03 13:51:26,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746708114] [2025-03-03 13:51:26,456 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:51:26,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-03 13:51:26,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:26,457 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-03 13:51:26,457 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2025-03-03 13:51:26,457 INFO L87 Difference]: Start difference. First operand 216 states and 297 transitions. Second operand has 15 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 8 states have call predecessors, (21), 6 states have call successors, (21) [2025-03-03 13:51:27,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:27,179 INFO L93 Difference]: Finished difference Result 249 states and 341 transitions. [2025-03-03 13:51:27,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-03 13:51:27,180 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 8 states have call predecessors, (21), 6 states have call successors, (21) Word has length 119 [2025-03-03 13:51:27,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:27,181 INFO L225 Difference]: With dead ends: 249 [2025-03-03 13:51:27,181 INFO L226 Difference]: Without dead ends: 247 [2025-03-03 13:51:27,183 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2025-03-03 13:51:27,183 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 23 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:27,183 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 399 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-03 13:51:27,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2025-03-03 13:51:27,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 225. [2025-03-03 13:51:27,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 111 states have (on average 1.162162162162162) internal successors, (129), 113 states have internal predecessors, (129), 90 states have call successors, (90), 23 states have call predecessors, (90), 23 states have return successors, (89), 88 states have call predecessors, (89), 89 states have call successors, (89) [2025-03-03 13:51:27,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 308 transitions. [2025-03-03 13:51:27,237 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 308 transitions. Word has length 119 [2025-03-03 13:51:27,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:27,237 INFO L471 AbstractCegarLoop]: Abstraction has 225 states and 308 transitions. [2025-03-03 13:51:27,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 8 states have call predecessors, (21), 6 states have call successors, (21) [2025-03-03 13:51:27,237 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 308 transitions. [2025-03-03 13:51:27,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2025-03-03 13:51:27,238 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:27,238 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:27,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-03 13:51:27,438 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-03 13:51:27,439 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:27,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:27,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1097173026, now seen corresponding path program 6 times [2025-03-03 13:51:27,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:27,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129237481] [2025-03-03 13:51:27,439 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:51:27,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:27,444 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 121 statements into 10 equivalence classes. [2025-03-03 13:51:27,466 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) and asserted 121 of 121 statements. [2025-03-03 13:51:27,466 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2025-03-03 13:51:27,466 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:51:27,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1481704952] [2025-03-03 13:51:27,467 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:51:27,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:27,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:27,469 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:51:27,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-03 13:51:27,503 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 121 statements into 10 equivalence classes. [2025-03-03 13:51:27,558 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 62 of 121 statements. [2025-03-03 13:51:27,558 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-03 13:51:27,558 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:27,559 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-03-03 13:51:27,561 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:28,082 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 103 proven. 19 refuted. 0 times theorem prover too weak. 419 trivial. 0 not checked. [2025-03-03 13:51:28,082 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:51:28,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:28,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129237481] [2025-03-03 13:51:28,397 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:51:28,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481704952] [2025-03-03 13:51:28,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481704952] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:51:28,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:51:28,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2025-03-03 13:51:28,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317329249] [2025-03-03 13:51:28,398 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:51:28,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-03 13:51:28,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:28,398 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-03 13:51:28,398 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2025-03-03 13:51:28,398 INFO L87 Difference]: Start difference. First operand 225 states and 308 transitions. Second operand has 16 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2025-03-03 13:51:28,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:28,845 INFO L93 Difference]: Finished difference Result 236 states and 317 transitions. [2025-03-03 13:51:28,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-03 13:51:28,846 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 121 [2025-03-03 13:51:28,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:28,847 INFO L225 Difference]: With dead ends: 236 [2025-03-03 13:51:28,847 INFO L226 Difference]: Without dead ends: 234 [2025-03-03 13:51:28,847 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2025-03-03 13:51:28,848 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 13 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:28,848 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 248 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-03 13:51:28,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2025-03-03 13:51:28,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 217. [2025-03-03 13:51:28,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 114 states have internal predecessors, (127), 81 states have call successors, (81), 24 states have call predecessors, (81), 24 states have return successors, (80), 78 states have call predecessors, (80), 80 states have call successors, (80) [2025-03-03 13:51:28,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 288 transitions. [2025-03-03 13:51:28,892 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 288 transitions. Word has length 121 [2025-03-03 13:51:28,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:28,892 INFO L471 AbstractCegarLoop]: Abstraction has 217 states and 288 transitions. [2025-03-03 13:51:28,892 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2025-03-03 13:51:28,892 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 288 transitions. [2025-03-03 13:51:28,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2025-03-03 13:51:28,893 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:28,893 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:28,900 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-03 13:51:29,093 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-03 13:51:29,093 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:29,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:29,094 INFO L85 PathProgramCache]: Analyzing trace with hash 421790415, now seen corresponding path program 2 times [2025-03-03 13:51:29,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:29,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349694368] [2025-03-03 13:51:29,094 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:51:29,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:29,099 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 127 statements into 2 equivalence classes. [2025-03-03 13:51:29,112 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 127 of 127 statements. [2025-03-03 13:51:29,112 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:51:29,112 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:51:29,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1872075043] [2025-03-03 13:51:29,116 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:51:29,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:29,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:29,117 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:51:29,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-03 13:51:29,146 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 127 statements into 2 equivalence classes. [2025-03-03 13:51:29,176 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 127 of 127 statements. [2025-03-03 13:51:29,176 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:51:29,176 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:29,181 INFO L256 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 56 conjuncts are in the unsatisfiable core [2025-03-03 13:51:29,183 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:29,716 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 73 proven. 38 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2025-03-03 13:51:29,717 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:51:30,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:30,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349694368] [2025-03-03 13:51:30,506 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:51:30,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872075043] [2025-03-03 13:51:30,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872075043] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:51:30,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:51:30,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2025-03-03 13:51:30,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534108799] [2025-03-03 13:51:30,506 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:51:30,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-03 13:51:30,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:30,507 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-03 13:51:30,507 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2025-03-03 13:51:30,507 INFO L87 Difference]: Start difference. First operand 217 states and 288 transitions. Second operand has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2025-03-03 13:51:31,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:31,062 INFO L93 Difference]: Finished difference Result 257 states and 345 transitions. [2025-03-03 13:51:31,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-03 13:51:31,063 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 127 [2025-03-03 13:51:31,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:31,064 INFO L225 Difference]: With dead ends: 257 [2025-03-03 13:51:31,064 INFO L226 Difference]: Without dead ends: 254 [2025-03-03 13:51:31,065 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 172 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=191, Invalid=999, Unknown=0, NotChecked=0, Total=1190 [2025-03-03 13:51:31,065 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 21 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:31,065 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 554 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-03 13:51:31,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2025-03-03 13:51:31,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 226. [2025-03-03 13:51:31,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 115 states have (on average 1.1478260869565218) internal successors, (132), 118 states have internal predecessors, (132), 85 states have call successors, (85), 25 states have call predecessors, (85), 25 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2025-03-03 13:51:31,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 301 transitions. [2025-03-03 13:51:31,120 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 301 transitions. Word has length 127 [2025-03-03 13:51:31,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:31,120 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 301 transitions. [2025-03-03 13:51:31,121 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2025-03-03 13:51:31,121 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 301 transitions. [2025-03-03 13:51:31,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2025-03-03 13:51:31,122 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:31,122 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:31,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-03 13:51:31,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:31,326 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:31,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:31,327 INFO L85 PathProgramCache]: Analyzing trace with hash -396679361, now seen corresponding path program 7 times [2025-03-03 13:51:31,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:31,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301106897] [2025-03-03 13:51:31,327 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:51:31,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:31,333 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 137 statements into 1 equivalence classes. [2025-03-03 13:51:31,352 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 137 of 137 statements. [2025-03-03 13:51:31,352 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:31,352 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:51:31,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [990916185] [2025-03-03 13:51:31,353 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:51:31,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:31,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:31,356 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:51:31,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-03 13:51:31,386 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 137 statements into 1 equivalence classes. [2025-03-03 13:51:31,419 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 137 of 137 statements. [2025-03-03 13:51:31,419 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:31,419 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:31,421 INFO L256 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 64 conjuncts are in the unsatisfiable core [2025-03-03 13:51:31,423 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:31,998 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 83 proven. 65 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2025-03-03 13:51:31,999 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:51:32,766 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 84 proven. 49 refuted. 0 times theorem prover too weak. 621 trivial. 0 not checked. [2025-03-03 13:51:32,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:32,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301106897] [2025-03-03 13:51:32,766 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:51:32,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990916185] [2025-03-03 13:51:32,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990916185] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:51:32,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:51:32,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 30 [2025-03-03 13:51:32,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179834775] [2025-03-03 13:51:32,766 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:51:32,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-03-03 13:51:32,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:32,767 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-03-03 13:51:32,767 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2025-03-03 13:51:32,767 INFO L87 Difference]: Start difference. First operand 226 states and 301 transitions. Second operand has 30 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 27 states have internal predecessors, (42), 15 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (46), 15 states have call predecessors, (46), 15 states have call successors, (46) [2025-03-03 13:51:34,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:34,643 INFO L93 Difference]: Finished difference Result 286 states and 389 transitions. [2025-03-03 13:51:34,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-03-03 13:51:34,643 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 27 states have internal predecessors, (42), 15 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (46), 15 states have call predecessors, (46), 15 states have call successors, (46) Word has length 137 [2025-03-03 13:51:34,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:34,645 INFO L225 Difference]: With dead ends: 286 [2025-03-03 13:51:34,645 INFO L226 Difference]: Without dead ends: 284 [2025-03-03 13:51:34,646 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=499, Invalid=1951, Unknown=0, NotChecked=0, Total=2450 [2025-03-03 13:51:34,646 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 58 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:34,646 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 436 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-03-03 13:51:34,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2025-03-03 13:51:34,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 246. [2025-03-03 13:51:34,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 124 states have (on average 1.1612903225806452) internal successors, (144), 126 states have internal predecessors, (144), 94 states have call successors, (94), 27 states have call predecessors, (94), 27 states have return successors, (93), 92 states have call predecessors, (93), 93 states have call successors, (93) [2025-03-03 13:51:34,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 331 transitions. [2025-03-03 13:51:34,722 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 331 transitions. Word has length 137 [2025-03-03 13:51:34,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:34,722 INFO L471 AbstractCegarLoop]: Abstraction has 246 states and 331 transitions. [2025-03-03 13:51:34,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 27 states have internal predecessors, (42), 15 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (46), 15 states have call predecessors, (46), 15 states have call successors, (46) [2025-03-03 13:51:34,723 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 331 transitions. [2025-03-03 13:51:34,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2025-03-03 13:51:34,723 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:34,723 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:34,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-03-03 13:51:34,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:34,926 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:34,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:34,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1870207617, now seen corresponding path program 3 times [2025-03-03 13:51:34,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:34,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814071142] [2025-03-03 13:51:34,927 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:51:34,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:34,931 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 146 statements into 15 equivalence classes. [2025-03-03 13:51:34,956 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) and asserted 146 of 146 statements. [2025-03-03 13:51:34,956 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2025-03-03 13:51:34,956 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:51:34,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [477081728] [2025-03-03 13:51:34,957 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:51:34,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:34,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:34,965 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:51:34,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-03 13:51:34,996 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 146 statements into 15 equivalence classes. [2025-03-03 13:51:35,013 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 57 of 146 statements. [2025-03-03 13:51:35,014 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-03 13:51:35,014 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:35,015 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-03-03 13:51:35,016 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:35,599 INFO L134 CoverageAnalysis]: Checked inductivity of 911 backedges. 96 proven. 42 refuted. 0 times theorem prover too weak. 773 trivial. 0 not checked. [2025-03-03 13:51:35,599 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:51:35,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:35,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814071142] [2025-03-03 13:51:35,759 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:51:35,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477081728] [2025-03-03 13:51:35,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477081728] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:51:35,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:51:35,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2025-03-03 13:51:35,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790916058] [2025-03-03 13:51:35,760 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:51:35,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-03 13:51:35,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:35,761 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-03 13:51:35,761 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2025-03-03 13:51:35,761 INFO L87 Difference]: Start difference. First operand 246 states and 331 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2025-03-03 13:51:36,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:36,051 INFO L93 Difference]: Finished difference Result 255 states and 339 transitions. [2025-03-03 13:51:36,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-03 13:51:36,051 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) Word has length 146 [2025-03-03 13:51:36,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:36,053 INFO L225 Difference]: With dead ends: 255 [2025-03-03 13:51:36,053 INFO L226 Difference]: Without dead ends: 248 [2025-03-03 13:51:36,053 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2025-03-03 13:51:36,053 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:36,054 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 208 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 13:51:36,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2025-03-03 13:51:36,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 239. [2025-03-03 13:51:36,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 121 states have (on average 1.1487603305785123) internal successors, (139), 123 states have internal predecessors, (139), 90 states have call successors, (90), 27 states have call predecessors, (90), 27 states have return successors, (89), 88 states have call predecessors, (89), 89 states have call successors, (89) [2025-03-03 13:51:36,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 318 transitions. [2025-03-03 13:51:36,132 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 318 transitions. Word has length 146 [2025-03-03 13:51:36,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:36,132 INFO L471 AbstractCegarLoop]: Abstraction has 239 states and 318 transitions. [2025-03-03 13:51:36,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2025-03-03 13:51:36,132 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 318 transitions. [2025-03-03 13:51:36,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2025-03-03 13:51:36,133 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:36,133 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:36,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-03-03 13:51:36,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2025-03-03 13:51:36,334 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:36,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:36,335 INFO L85 PathProgramCache]: Analyzing trace with hash 2080103466, now seen corresponding path program 4 times [2025-03-03 13:51:36,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:36,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136876529] [2025-03-03 13:51:36,335 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:51:36,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:36,341 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 148 statements into 2 equivalence classes. [2025-03-03 13:51:36,357 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 148 of 148 statements. [2025-03-03 13:51:36,357 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:51:36,357 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:51:36,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [468504455] [2025-03-03 13:51:36,360 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:51:36,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:36,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:36,363 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:51:36,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-03 13:51:36,409 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 148 statements into 2 equivalence classes. [2025-03-03 13:51:36,442 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 141 of 148 statements. [2025-03-03 13:51:36,442 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 13:51:36,442 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:36,444 INFO L256 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 54 conjuncts are in the unsatisfiable core [2025-03-03 13:51:36,446 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:37,305 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 99 proven. 67 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2025-03-03 13:51:37,305 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:51:42,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:42,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136876529] [2025-03-03 13:51:42,194 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:51:42,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468504455] [2025-03-03 13:51:42,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468504455] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:51:42,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:51:42,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2025-03-03 13:51:42,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236266044] [2025-03-03 13:51:42,195 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:51:42,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-03 13:51:42,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:42,195 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-03 13:51:42,195 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=575, Unknown=1, NotChecked=0, Total=650 [2025-03-03 13:51:42,196 INFO L87 Difference]: Start difference. First operand 239 states and 318 transitions. Second operand has 20 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 10 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2025-03-03 13:51:44,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:44,557 INFO L93 Difference]: Finished difference Result 273 states and 371 transitions. [2025-03-03 13:51:44,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-03 13:51:44,560 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 10 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 148 [2025-03-03 13:51:44,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:44,561 INFO L225 Difference]: With dead ends: 273 [2025-03-03 13:51:44,562 INFO L226 Difference]: Without dead ends: 266 [2025-03-03 13:51:44,562 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=130, Invalid=991, Unknown=1, NotChecked=0, Total=1122 [2025-03-03 13:51:44,563 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 36 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:44,563 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 379 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2025-03-03 13:51:44,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2025-03-03 13:51:44,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 246. [2025-03-03 13:51:44,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 124 states have (on average 1.153225806451613) internal successors, (143), 126 states have internal predecessors, (143), 94 states have call successors, (94), 27 states have call predecessors, (94), 27 states have return successors, (93), 92 states have call predecessors, (93), 93 states have call successors, (93) [2025-03-03 13:51:44,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 330 transitions. [2025-03-03 13:51:44,649 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 330 transitions. Word has length 148 [2025-03-03 13:51:44,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:44,649 INFO L471 AbstractCegarLoop]: Abstraction has 246 states and 330 transitions. [2025-03-03 13:51:44,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 10 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2025-03-03 13:51:44,649 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 330 transitions. [2025-03-03 13:51:44,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2025-03-03 13:51:44,651 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:44,651 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:44,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-03 13:51:44,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-03-03 13:51:44,852 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:44,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:44,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1433697100, now seen corresponding path program 5 times [2025-03-03 13:51:44,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:44,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448602467] [2025-03-03 13:51:44,852 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:51:44,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:44,857 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 148 statements into 15 equivalence classes. [2025-03-03 13:51:44,874 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) and asserted 148 of 148 statements. [2025-03-03 13:51:44,874 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2025-03-03 13:51:44,874 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:51:44,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1079506610] [2025-03-03 13:51:44,875 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:51:44,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:44,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:44,877 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:51:44,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-03 13:51:44,912 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 148 statements into 15 equivalence classes. [2025-03-03 13:51:45,100 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) and asserted 148 of 148 statements. [2025-03-03 13:51:45,100 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2025-03-03 13:51:45,100 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:45,102 INFO L256 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 68 conjuncts are in the unsatisfiable core [2025-03-03 13:51:45,104 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:45,838 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 80 proven. 122 refuted. 0 times theorem prover too weak. 712 trivial. 0 not checked. [2025-03-03 13:51:45,839 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:51:47,526 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 80 proven. 122 refuted. 0 times theorem prover too weak. 712 trivial. 0 not checked. [2025-03-03 13:51:47,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:47,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448602467] [2025-03-03 13:51:47,527 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:51:47,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079506610] [2025-03-03 13:51:47,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079506610] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:51:47,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:51:47,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2025-03-03 13:51:47,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895826334] [2025-03-03 13:51:47,527 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:51:47,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-03 13:51:47,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:47,528 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-03 13:51:47,528 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2025-03-03 13:51:47,528 INFO L87 Difference]: Start difference. First operand 246 states and 330 transitions. Second operand has 32 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 27 states have internal predecessors, (41), 19 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (48), 17 states have call predecessors, (48), 17 states have call successors, (48) [2025-03-03 13:51:52,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-03 13:51:58,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-03 13:52:23,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.59s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-03 13:52:24,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:24,979 INFO L93 Difference]: Finished difference Result 343 states and 491 transitions. [2025-03-03 13:52:24,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2025-03-03 13:52:24,980 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 27 states have internal predecessors, (41), 19 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (48), 17 states have call predecessors, (48), 17 states have call successors, (48) Word has length 148 [2025-03-03 13:52:24,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:24,981 INFO L225 Difference]: With dead ends: 343 [2025-03-03 13:52:24,981 INFO L226 Difference]: Without dead ends: 335 [2025-03-03 13:52:24,983 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1933 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=1339, Invalid=6493, Unknown=0, NotChecked=0, Total=7832 [2025-03-03 13:52:24,983 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 63 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 180 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.9s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:24,983 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 1005 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1152 Invalid, 2 Unknown, 0 Unchecked, 17.9s Time] [2025-03-03 13:52:24,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2025-03-03 13:52:25,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 265. [2025-03-03 13:52:25,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 130 states have (on average 1.1538461538461537) internal successors, (150), 133 states have internal predecessors, (150), 105 states have call successors, (105), 29 states have call predecessors, (105), 29 states have return successors, (104), 102 states have call predecessors, (104), 104 states have call successors, (104) [2025-03-03 13:52:25,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 359 transitions. [2025-03-03 13:52:25,123 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 359 transitions. Word has length 148 [2025-03-03 13:52:25,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:25,123 INFO L471 AbstractCegarLoop]: Abstraction has 265 states and 359 transitions. [2025-03-03 13:52:25,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 27 states have internal predecessors, (41), 19 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (48), 17 states have call predecessors, (48), 17 states have call successors, (48) [2025-03-03 13:52:25,124 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 359 transitions. [2025-03-03 13:52:25,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2025-03-03 13:52:25,125 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:25,125 INFO L218 NwaCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:25,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-03-03 13:52:25,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:25,325 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:25,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:25,325 INFO L85 PathProgramCache]: Analyzing trace with hash 132055332, now seen corresponding path program 8 times [2025-03-03 13:52:25,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:25,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542679177] [2025-03-03 13:52:25,326 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:52:25,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:25,330 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 158 statements into 2 equivalence classes. [2025-03-03 13:52:25,347 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 158 of 158 statements. [2025-03-03 13:52:25,347 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:52:25,347 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:25,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941257172] [2025-03-03 13:52:25,347 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:52:25,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:25,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:25,349 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:25,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-03 13:52:25,386 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 158 statements into 2 equivalence classes. [2025-03-03 13:52:25,420 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 158 of 158 statements. [2025-03-03 13:52:25,420 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:52:25,420 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:25,422 INFO L256 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 73 conjuncts are in the unsatisfiable core [2025-03-03 13:52:25,424 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:26,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1097 backedges. 103 proven. 88 refuted. 0 times theorem prover too weak. 906 trivial. 0 not checked. [2025-03-03 13:52:26,158 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:27,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1097 backedges. 101 proven. 75 refuted. 0 times theorem prover too weak. 921 trivial. 0 not checked. [2025-03-03 13:52:27,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:27,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542679177] [2025-03-03 13:52:27,543 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:27,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941257172] [2025-03-03 13:52:27,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941257172] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:52:27,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:52:27,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 32 [2025-03-03 13:52:27,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390394566] [2025-03-03 13:52:27,543 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:27,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-03 13:52:27,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:27,544 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-03 13:52:27,544 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2025-03-03 13:52:27,544 INFO L87 Difference]: Start difference. First operand 265 states and 359 transitions. Second operand has 32 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 29 states have internal predecessors, (44), 17 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (54), 17 states have call predecessors, (54), 17 states have call successors, (54) [2025-03-03 13:52:41,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 12.25s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-03 13:52:45,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:45,411 INFO L93 Difference]: Finished difference Result 360 states and 516 transitions. [2025-03-03 13:52:45,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2025-03-03 13:52:45,411 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 29 states have internal predecessors, (44), 17 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (54), 17 states have call predecessors, (54), 17 states have call successors, (54) Word has length 158 [2025-03-03 13:52:45,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:45,413 INFO L225 Difference]: With dead ends: 360 [2025-03-03 13:52:45,413 INFO L226 Difference]: Without dead ends: 358 [2025-03-03 13:52:45,414 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=747, Invalid=3035, Unknown=0, NotChecked=0, Total=3782 [2025-03-03 13:52:45,415 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 97 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 211 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 1352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:45,415 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 728 Invalid, 1352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 1140 Invalid, 1 Unknown, 0 Unchecked, 14.9s Time] [2025-03-03 13:52:45,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2025-03-03 13:52:45,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 286. [2025-03-03 13:52:45,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 138 states have (on average 1.173913043478261) internal successors, (162), 141 states have internal predecessors, (162), 117 states have call successors, (117), 30 states have call predecessors, (117), 30 states have return successors, (116), 114 states have call predecessors, (116), 116 states have call successors, (116) [2025-03-03 13:52:45,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 395 transitions. [2025-03-03 13:52:45,610 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 395 transitions. Word has length 158 [2025-03-03 13:52:45,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:45,610 INFO L471 AbstractCegarLoop]: Abstraction has 286 states and 395 transitions. [2025-03-03 13:52:45,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 29 states have internal predecessors, (44), 17 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (54), 17 states have call predecessors, (54), 17 states have call successors, (54) [2025-03-03 13:52:45,611 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 395 transitions. [2025-03-03 13:52:45,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2025-03-03 13:52:45,612 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:45,612 INFO L218 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:45,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2025-03-03 13:52:45,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:45,816 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:45,816 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:45,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1111423407, now seen corresponding path program 6 times [2025-03-03 13:52:45,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:45,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149484557] [2025-03-03 13:52:45,816 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:52:45,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:45,821 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 169 statements into 16 equivalence classes. [2025-03-03 13:52:45,847 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) and asserted 169 of 169 statements. [2025-03-03 13:52:45,847 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2025-03-03 13:52:45,847 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:45,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1453609113] [2025-03-03 13:52:45,848 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:52:45,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:45,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:45,850 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:45,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-03 13:52:45,884 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 169 statements into 16 equivalence classes. [2025-03-03 13:52:45,922 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 86 of 169 statements. [2025-03-03 13:52:45,922 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-03 13:52:45,922 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:45,924 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 55 conjuncts are in the unsatisfiable core [2025-03-03 13:52:45,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:46,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 127 proven. 114 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2025-03-03 13:52:46,745 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:47,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:47,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149484557] [2025-03-03 13:52:47,017 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:47,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453609113] [2025-03-03 13:52:47,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453609113] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:52:47,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:52:47,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2025-03-03 13:52:47,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343240411] [2025-03-03 13:52:47,017 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:47,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-03 13:52:47,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:47,018 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-03 13:52:47,018 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2025-03-03 13:52:47,018 INFO L87 Difference]: Start difference. First operand 286 states and 395 transitions. Second operand has 16 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2025-03-03 13:52:47,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:47,837 INFO L93 Difference]: Finished difference Result 338 states and 468 transitions. [2025-03-03 13:52:47,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-03 13:52:47,837 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) Word has length 169 [2025-03-03 13:52:47,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:47,839 INFO L225 Difference]: With dead ends: 338 [2025-03-03 13:52:47,839 INFO L226 Difference]: Without dead ends: 331 [2025-03-03 13:52:47,839 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 170 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2025-03-03 13:52:47,840 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 16 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:47,840 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 461 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-03 13:52:47,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2025-03-03 13:52:48,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 268. [2025-03-03 13:52:48,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 132 states have (on average 1.1590909090909092) internal successors, (153), 136 states have internal predecessors, (153), 106 states have call successors, (106), 29 states have call predecessors, (106), 29 states have return successors, (105), 102 states have call predecessors, (105), 105 states have call successors, (105) [2025-03-03 13:52:48,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 364 transitions. [2025-03-03 13:52:48,010 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 364 transitions. Word has length 169 [2025-03-03 13:52:48,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:48,010 INFO L471 AbstractCegarLoop]: Abstraction has 268 states and 364 transitions. [2025-03-03 13:52:48,010 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2025-03-03 13:52:48,010 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 364 transitions. [2025-03-03 13:52:48,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2025-03-03 13:52:48,011 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:48,011 INFO L218 NwaCegarLoop]: trace histogram [27, 26, 26, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:48,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-03-03 13:52:48,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-03-03 13:52:48,215 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:48,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:48,215 INFO L85 PathProgramCache]: Analyzing trace with hash 223774377, now seen corresponding path program 9 times [2025-03-03 13:52:48,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:48,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739620048] [2025-03-03 13:52:48,215 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:52:48,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:48,220 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 179 statements into 16 equivalence classes. [2025-03-03 13:52:48,245 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) and asserted 179 of 179 statements. [2025-03-03 13:52:48,245 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2025-03-03 13:52:48,245 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:48,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [247055917] [2025-03-03 13:52:48,246 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:52:48,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:48,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:48,249 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:48,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-03 13:52:48,287 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 179 statements into 16 equivalence classes. [2025-03-03 13:52:48,357 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 83 of 179 statements. [2025-03-03 13:52:48,357 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-03 13:52:48,357 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:48,362 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 50 conjuncts are in the unsatisfiable core [2025-03-03 13:52:48,365 INFO L279 TraceCheckSpWp]: Computing forward predicates...