./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 023d838f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i -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 cae1888d2d961d86748cda3b827a90e6d152bf2b6038710fc1a5581289f20b0c --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-09 17:48:50,487 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 17:48:50,542 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-09 17:48:50,545 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 17:48:50,547 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 17:48:50,572 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 17:48:50,573 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 17:48:50,573 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 17:48:50,574 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 17:48:50,574 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 17:48:50,575 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 17:48:50,576 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 17:48:50,576 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 17:48:50,577 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 17:48:50,577 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 17:48:50,578 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 17:48:50,578 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 17:48:50,578 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 17:48:50,578 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 17:48:50,579 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 17:48:50,579 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 17:48:50,582 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 17:48:50,582 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 17:48:50,582 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 17:48:50,583 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 17:48:50,583 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 17:48:50,583 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 17:48:50,583 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 17:48:50,583 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-09 17:48:50,584 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 17:48:50,584 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 17:48:50,584 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 17:48:50,584 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 17:48:50,584 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 17:48:50,584 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 17:48:50,585 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 17:48:50,585 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 17:48:50,585 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 17:48:50,585 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 17:48:50,585 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 17:48:50,586 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 17:48:50,586 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 17:48:50,586 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cae1888d2d961d86748cda3b827a90e6d152bf2b6038710fc1a5581289f20b0c [2024-11-09 17:48:50,774 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 17:48:50,794 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 17:48:50,796 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 17:48:50,797 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 17:48:50,797 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 17:48:50,798 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i [2024-11-09 17:48:52,014 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 17:48:52,163 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 17:48:52,164 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i [2024-11-09 17:48:52,173 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2854ab6fe/b80d6b6e0aa24641a679f498c5c2bc99/FLAGd5c720928 [2024-11-09 17:48:52,185 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2854ab6fe/b80d6b6e0aa24641a679f498c5c2bc99 [2024-11-09 17:48:52,188 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 17:48:52,188 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 17:48:52,190 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 17:48:52,190 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 17:48:52,194 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 17:48:52,195 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:48:52" (1/1) ... [2024-11-09 17:48:52,196 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@723743c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:48:52, skipping insertion in model container [2024-11-09 17:48:52,196 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:48:52" (1/1) ... [2024-11-09 17:48:52,217 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 17:48:52,353 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/array-examples/sorting_selectionsort_2_ground.i[823,836] [2024-11-09 17:48:52,373 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 17:48:52,378 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 17:48:52,398 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/array-examples/sorting_selectionsort_2_ground.i[823,836] [2024-11-09 17:48:52,417 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 17:48:52,434 INFO L204 MainTranslator]: Completed translation [2024-11-09 17:48:52,434 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:48:52 WrapperNode [2024-11-09 17:48:52,434 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 17:48:52,435 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 17:48:52,435 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 17:48:52,436 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 17:48:52,446 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:48:52" (1/1) ... [2024-11-09 17:48:52,450 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:48:52" (1/1) ... [2024-11-09 17:48:52,464 INFO L138 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 108 [2024-11-09 17:48:52,464 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 17:48:52,465 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 17:48:52,465 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 17:48:52,465 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 17:48:52,471 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:48:52" (1/1) ... [2024-11-09 17:48:52,471 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:48:52" (1/1) ... [2024-11-09 17:48:52,473 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:48:52" (1/1) ... [2024-11-09 17:48:52,481 INFO L175 MemorySlicer]: Split 15 memory accesses to 2 slices as follows [2, 13]. 87 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-09 17:48:52,482 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:48:52" (1/1) ... [2024-11-09 17:48:52,482 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:48:52" (1/1) ... [2024-11-09 17:48:52,485 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:48:52" (1/1) ... [2024-11-09 17:48:52,485 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:48:52" (1/1) ... [2024-11-09 17:48:52,486 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:48:52" (1/1) ... [2024-11-09 17:48:52,487 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:48:52" (1/1) ... [2024-11-09 17:48:52,488 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 17:48:52,489 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-09 17:48:52,489 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-09 17:48:52,489 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-09 17:48:52,490 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:48:52" (1/1) ... [2024-11-09 17:48:52,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 17:48:52,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 17:48:52,516 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-09 17:48:52,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-09 17:48:52,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 17:48:52,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 17:48:52,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 17:48:52,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 17:48:52,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 17:48:52,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 17:48:52,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 17:48:52,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 17:48:52,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 17:48:52,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 17:48:52,548 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-09 17:48:52,548 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-09 17:48:52,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 17:48:52,610 INFO L256 CfgBuilder]: Building ICFG [2024-11-09 17:48:52,612 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 17:48:52,727 INFO L1247 $ProcedureCfgBuilder]: dead code at ProgramPoint L16: call ULTIMATE.dealloc(main_~#a~0#1.base, main_~#a~0#1.offset);havoc main_~#a~0#1.base, main_~#a~0#1.offset; [2024-11-09 17:48:52,738 INFO L? ?]: Removed 14 outVars from TransFormulas that were not future-live. [2024-11-09 17:48:52,739 INFO L307 CfgBuilder]: Performing block encoding [2024-11-09 17:48:52,748 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 17:48:52,749 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 17:48:52,749 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.11 05:48:52 BoogieIcfgContainer [2024-11-09 17:48:52,749 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-09 17:48:52,751 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 17:48:52,751 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 17:48:52,753 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 17:48:52,753 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:48:52" (1/3) ... [2024-11-09 17:48:52,754 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b33b920 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:48:52, skipping insertion in model container [2024-11-09 17:48:52,754 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:48:52" (2/3) ... [2024-11-09 17:48:52,754 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b33b920 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:48:52, skipping insertion in model container [2024-11-09 17:48:52,754 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.11 05:48:52" (3/3) ... [2024-11-09 17:48:52,755 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_2_ground.i [2024-11-09 17:48:52,766 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 17:48:52,767 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 17:48:52,809 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 17:48:52,814 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;@696dbffb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 17:48:52,815 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 17:48:52,819 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 40 states have (on average 1.5) internal successors, (60), 41 states have internal predecessors, (60), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 17:48:52,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-09 17:48:52,825 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 17:48:52,826 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 17:48:52,826 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 17:48:52,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 17:48:52,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1591849663, now seen corresponding path program 1 times [2024-11-09 17:48:52,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 17:48:52,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896489965] [2024-11-09 17:48:52,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 17:48:52,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 17:48:52,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 17:48:52,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 17:48:52,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 17:48:52,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896489965] [2024-11-09 17:48:52,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896489965] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 17:48:52,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 17:48:52,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 17:48:52,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416874128] [2024-11-09 17:48:52,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 17:48:52,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 17:48:52,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 17:48:52,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 17:48:52,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 17:48:52,979 INFO L87 Difference]: Start difference. First operand has 46 states, 40 states have (on average 1.5) internal successors, (60), 41 states have internal predecessors, (60), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 17:48:52,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 17:48:52,993 INFO L93 Difference]: Finished difference Result 87 states and 128 transitions. [2024-11-09 17:48:52,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 17:48:52,995 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-09 17:48:52,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 17:48:52,999 INFO L225 Difference]: With dead ends: 87 [2024-11-09 17:48:52,999 INFO L226 Difference]: Without dead ends: 41 [2024-11-09 17:48:53,001 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 17:48:53,004 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 17:48:53,005 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 17:48:53,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-09 17:48:53,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-11-09 17:48:53,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 36 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 17:48:53,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2024-11-09 17:48:53,041 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 15 [2024-11-09 17:48:53,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 17:48:53,041 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2024-11-09 17:48:53,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 17:48:53,041 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2024-11-09 17:48:53,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-09 17:48:53,043 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 17:48:53,043 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 17:48:53,043 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 17:48:53,044 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 17:48:53,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 17:48:53,044 INFO L85 PathProgramCache]: Analyzing trace with hash 539894556, now seen corresponding path program 1 times [2024-11-09 17:48:53,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 17:48:53,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679254930] [2024-11-09 17:48:53,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 17:48:53,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 17:48:53,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 17:48:53,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 17:48:53,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 17:48:53,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679254930] [2024-11-09 17:48:53,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679254930] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 17:48:53,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 17:48:53,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 17:48:53,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676989252] [2024-11-09 17:48:53,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 17:48:53,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 17:48:53,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 17:48:53,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 17:48:53,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 17:48:53,139 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 17:48:53,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 17:48:53,201 INFO L93 Difference]: Finished difference Result 101 states and 132 transitions. [2024-11-09 17:48:53,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 17:48:53,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-09 17:48:53,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 17:48:53,203 INFO L225 Difference]: With dead ends: 101 [2024-11-09 17:48:53,203 INFO L226 Difference]: Without dead ends: 64 [2024-11-09 17:48:53,203 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 17:48:53,204 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 24 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 17:48:53,204 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 78 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 17:48:53,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-09 17:48:53,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 45. [2024-11-09 17:48:53,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 17:48:53,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2024-11-09 17:48:53,211 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 17 [2024-11-09 17:48:53,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 17:48:53,212 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2024-11-09 17:48:53,212 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 17:48:53,212 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2024-11-09 17:48:53,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-09 17:48:53,213 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 17:48:53,213 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 17:48:53,213 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 17:48:53,214 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 17:48:53,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 17:48:53,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1307543254, now seen corresponding path program 1 times [2024-11-09 17:48:53,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 17:48:53,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593766645] [2024-11-09 17:48:53,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 17:48:53,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 17:48:53,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 17:48:53,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 17:48:53,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 17:48:53,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593766645] [2024-11-09 17:48:53,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593766645] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 17:48:53,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015003236] [2024-11-09 17:48:53,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 17:48:53,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 17:48:53,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 17:48:53,324 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 17:48:53,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 17:48:53,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 17:48:53,371 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 17:48:53,374 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 17:48:53,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 17:48:53,407 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 17:48:53,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 17:48:53,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015003236] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 17:48:53,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 17:48:53,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-09 17:48:53,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119851322] [2024-11-09 17:48:53,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 17:48:53,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 17:48:53,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 17:48:53,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 17:48:53,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-09 17:48:53,437 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 17:48:53,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 17:48:53,550 INFO L93 Difference]: Finished difference Result 153 states and 204 transitions. [2024-11-09 17:48:53,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 17:48:53,550 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-09 17:48:53,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 17:48:53,551 INFO L225 Difference]: With dead ends: 153 [2024-11-09 17:48:53,551 INFO L226 Difference]: Without dead ends: 114 [2024-11-09 17:48:53,552 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-09 17:48:53,553 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 141 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 17:48:53,553 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 149 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 17:48:53,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-09 17:48:53,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2024-11-09 17:48:53,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 103 states have (on average 1.2718446601941749) internal successors, (131), 103 states have internal predecessors, (131), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-09 17:48:53,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 149 transitions. [2024-11-09 17:48:53,567 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 149 transitions. Word has length 22 [2024-11-09 17:48:53,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 17:48:53,567 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 149 transitions. [2024-11-09 17:48:53,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 17:48:53,568 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 149 transitions. [2024-11-09 17:48:53,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-09 17:48:53,568 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 17:48:53,568 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 17:48:53,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 17:48:53,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 17:48:53,775 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 17:48:53,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 17:48:53,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1536732307, now seen corresponding path program 2 times [2024-11-09 17:48:53,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 17:48:53,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140982254] [2024-11-09 17:48:53,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 17:48:53,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 17:48:53,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 17:48:53,864 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 17:48:53,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 17:48:53,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140982254] [2024-11-09 17:48:53,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140982254] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 17:48:53,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 17:48:53,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 17:48:53,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910919497] [2024-11-09 17:48:53,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 17:48:53,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 17:48:53,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 17:48:53,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 17:48:53,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 17:48:53,866 INFO L87 Difference]: Start difference. First operand 114 states and 149 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 17:48:53,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 17:48:53,926 INFO L93 Difference]: Finished difference Result 213 states and 282 transitions. [2024-11-09 17:48:53,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 17:48:53,927 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-11-09 17:48:53,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 17:48:53,927 INFO L225 Difference]: With dead ends: 213 [2024-11-09 17:48:53,927 INFO L226 Difference]: Without dead ends: 118 [2024-11-09 17:48:53,928 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 17:48:53,929 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 32 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 17:48:53,929 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 111 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 17:48:53,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-09 17:48:53,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2024-11-09 17:48:53,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 105 states have (on average 1.2666666666666666) internal successors, (133), 105 states have internal predecessors, (133), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-09 17:48:53,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 151 transitions. [2024-11-09 17:48:53,948 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 151 transitions. Word has length 28 [2024-11-09 17:48:53,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 17:48:53,948 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 151 transitions. [2024-11-09 17:48:53,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 17:48:53,949 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 151 transitions. [2024-11-09 17:48:53,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-09 17:48:53,949 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 17:48:53,950 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 17:48:53,950 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 17:48:53,950 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 17:48:53,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 17:48:53,951 INFO L85 PathProgramCache]: Analyzing trace with hash 892254869, now seen corresponding path program 1 times [2024-11-09 17:48:53,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 17:48:53,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643070045] [2024-11-09 17:48:53,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 17:48:53,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 17:48:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 17:48:54,011 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 17:48:54,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 17:48:54,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643070045] [2024-11-09 17:48:54,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643070045] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 17:48:54,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190780008] [2024-11-09 17:48:54,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 17:48:54,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 17:48:54,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 17:48:54,016 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 17:48:54,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 17:48:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 17:48:54,075 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 17:48:54,077 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 17:48:54,124 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 17:48:54,124 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 17:48:54,192 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 17:48:54,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190780008] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 17:48:54,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 17:48:54,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2024-11-09 17:48:54,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612827138] [2024-11-09 17:48:54,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 17:48:54,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 17:48:54,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 17:48:54,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 17:48:54,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2024-11-09 17:48:54,194 INFO L87 Difference]: Start difference. First operand 116 states and 151 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 17:48:54,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 17:48:54,741 INFO L93 Difference]: Finished difference Result 456 states and 634 transitions. [2024-11-09 17:48:54,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-09 17:48:54,741 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-09 17:48:54,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 17:48:54,743 INFO L225 Difference]: With dead ends: 456 [2024-11-09 17:48:54,743 INFO L226 Difference]: Without dead ends: 352 [2024-11-09 17:48:54,746 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=580, Invalid=1312, Unknown=0, NotChecked=0, Total=1892 [2024-11-09 17:48:54,748 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 860 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 880 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 17:48:54,748 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [880 Valid, 311 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 17:48:54,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2024-11-09 17:48:54,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 332. [2024-11-09 17:48:54,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 309 states have (on average 1.3042071197411003) internal successors, (403), 309 states have internal predecessors, (403), 21 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-11-09 17:48:54,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 445 transitions. [2024-11-09 17:48:54,770 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 445 transitions. Word has length 32 [2024-11-09 17:48:54,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 17:48:54,771 INFO L471 AbstractCegarLoop]: Abstraction has 332 states and 445 transitions. [2024-11-09 17:48:54,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 17:48:54,771 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 445 transitions. [2024-11-09 17:48:54,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-09 17:48:54,772 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 17:48:54,772 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 17:48:54,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 17:48:54,972 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 17:48:54,973 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 17:48:54,973 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 17:48:54,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1230132880, now seen corresponding path program 1 times [2024-11-09 17:48:54,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 17:48:54,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183359451] [2024-11-09 17:48:54,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 17:48:54,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 17:48:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 17:48:55,087 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-09 17:48:55,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 17:48:55,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183359451] [2024-11-09 17:48:55,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183359451] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 17:48:55,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313046533] [2024-11-09 17:48:55,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 17:48:55,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 17:48:55,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 17:48:55,091 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 17:48:55,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 17:48:55,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 17:48:55,156 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 17:48:55,157 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 17:48:55,276 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 17:48:55,276 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 17:48:55,482 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 17:48:55,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313046533] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 17:48:55,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 17:48:55,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13, 13] total 27 [2024-11-09 17:48:55,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105707141] [2024-11-09 17:48:55,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 17:48:55,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-09 17:48:55,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 17:48:55,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-09 17:48:55,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2024-11-09 17:48:55,485 INFO L87 Difference]: Start difference. First operand 332 states and 445 transitions. Second operand has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 27 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 17:48:55,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 17:48:55,920 INFO L93 Difference]: Finished difference Result 1024 states and 1409 transitions. [2024-11-09 17:48:55,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-09 17:48:55,920 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 27 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-11-09 17:48:55,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 17:48:55,923 INFO L225 Difference]: With dead ends: 1024 [2024-11-09 17:48:55,923 INFO L226 Difference]: Without dead ends: 716 [2024-11-09 17:48:55,924 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=385, Invalid=485, Unknown=0, NotChecked=0, Total=870 [2024-11-09 17:48:55,924 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 1205 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1249 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 17:48:55,925 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1249 Valid, 578 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 17:48:55,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2024-11-09 17:48:55,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 710. [2024-11-09 17:48:55,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 663 states have (on average 1.3046757164404224) internal successors, (865), 663 states have internal predecessors, (865), 45 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2024-11-09 17:48:55,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 955 transitions. [2024-11-09 17:48:55,951 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 955 transitions. Word has length 44 [2024-11-09 17:48:55,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 17:48:55,952 INFO L471 AbstractCegarLoop]: Abstraction has 710 states and 955 transitions. [2024-11-09 17:48:55,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 27 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 17:48:55,952 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 955 transitions. [2024-11-09 17:48:55,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-09 17:48:55,953 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 17:48:55,953 INFO L215 NwaCegarLoop]: trace histogram [23, 22, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 17:48:55,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 17:48:56,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 17:48:56,154 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 17:48:56,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 17:48:56,155 INFO L85 PathProgramCache]: Analyzing trace with hash 773330757, now seen corresponding path program 2 times [2024-11-09 17:48:56,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 17:48:56,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791014172] [2024-11-09 17:48:56,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 17:48:56,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 17:48:56,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 17:48:56,262 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 514 trivial. 0 not checked. [2024-11-09 17:48:56,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 17:48:56,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791014172] [2024-11-09 17:48:56,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791014172] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 17:48:56,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 17:48:56,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 17:48:56,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506402246] [2024-11-09 17:48:56,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 17:48:56,264 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 17:48:56,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 17:48:56,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 17:48:56,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 17:48:56,265 INFO L87 Difference]: Start difference. First operand 710 states and 955 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 17:48:56,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 17:48:56,300 INFO L93 Difference]: Finished difference Result 1344 states and 1825 transitions. [2024-11-09 17:48:56,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 17:48:56,301 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2024-11-09 17:48:56,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 17:48:56,303 INFO L225 Difference]: With dead ends: 1344 [2024-11-09 17:48:56,303 INFO L226 Difference]: Without dead ends: 705 [2024-11-09 17:48:56,304 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 17:48:56,305 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 9 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 17:48:56,305 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 90 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 17:48:56,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2024-11-09 17:48:56,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 705. [2024-11-09 17:48:56,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 659 states have (on average 1.3034901365705616) internal successors, (859), 659 states have internal predecessors, (859), 44 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-11-09 17:48:56,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 947 transitions. [2024-11-09 17:48:56,324 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 947 transitions. Word has length 72 [2024-11-09 17:48:56,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 17:48:56,324 INFO L471 AbstractCegarLoop]: Abstraction has 705 states and 947 transitions. [2024-11-09 17:48:56,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 17:48:56,324 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 947 transitions. [2024-11-09 17:48:56,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-09 17:48:56,325 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 17:48:56,325 INFO L215 NwaCegarLoop]: trace histogram [23, 22, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 17:48:56,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 17:48:56,326 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 17:48:56,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 17:48:56,326 INFO L85 PathProgramCache]: Analyzing trace with hash -322185888, now seen corresponding path program 1 times [2024-11-09 17:48:56,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 17:48:56,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540347903] [2024-11-09 17:48:56,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 17:48:56,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 17:48:56,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 17:48:56,877 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 17:48:56,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 17:48:56,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540347903] [2024-11-09 17:48:56,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540347903] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 17:48:56,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670713846] [2024-11-09 17:48:56,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 17:48:56,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 17:48:56,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 17:48:56,895 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 17:48:56,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 17:48:56,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 17:48:56,988 INFO L255 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 17:48:56,990 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 17:48:57,061 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 17:48:57,062 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 17:48:57,646 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 17:48:57,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670713846] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 17:48:57,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 17:48:57,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2024-11-09 17:48:57,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149513305] [2024-11-09 17:48:57,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 17:48:57,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-09 17:48:57,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 17:48:57,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-09 17:48:57,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-11-09 17:48:57,649 INFO L87 Difference]: Start difference. First operand 705 states and 947 transitions. Second operand has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 49 states have internal predecessors, (117), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 17:48:58,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 17:48:58,732 INFO L93 Difference]: Finished difference Result 2106 states and 2901 transitions. [2024-11-09 17:48:58,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-09 17:48:58,733 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 49 states have internal predecessors, (117), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2024-11-09 17:48:58,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 17:48:58,738 INFO L225 Difference]: With dead ends: 2106 [2024-11-09 17:48:58,738 INFO L226 Difference]: Without dead ends: 1449 [2024-11-09 17:48:58,739 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-11-09 17:48:58,739 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 3525 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3616 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 17:48:58,740 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3616 Valid, 927 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 17:48:58,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2024-11-09 17:48:58,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 1449. [2024-11-09 17:48:58,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1355 states have (on average 1.3070110701107012) internal successors, (1771), 1355 states have internal predecessors, (1771), 92 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-09 17:48:58,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 1955 transitions. [2024-11-09 17:48:58,772 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 1955 transitions. Word has length 73 [2024-11-09 17:48:58,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 17:48:58,772 INFO L471 AbstractCegarLoop]: Abstraction has 1449 states and 1955 transitions. [2024-11-09 17:48:58,772 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 49 states have internal predecessors, (117), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 17:48:58,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 1955 transitions. [2024-11-09 17:48:58,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-11-09 17:48:58,777 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 17:48:58,777 INFO L215 NwaCegarLoop]: trace histogram [47, 46, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 17:48:58,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 17:48:58,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 17:48:58,978 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 17:48:58,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 17:48:58,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1630290056, now seen corresponding path program 2 times [2024-11-09 17:48:58,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 17:48:58,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997744330] [2024-11-09 17:48:58,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 17:48:58,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 17:48:59,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 17:49:00,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2170 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 17:49:00,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 17:49:00,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997744330] [2024-11-09 17:49:00,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997744330] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 17:49:00,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914056334] [2024-11-09 17:49:00,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 17:49:00,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 17:49:00,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 17:49:00,446 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 17:49:00,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 17:49:00,574 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 17:49:00,574 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 17:49:00,577 INFO L255 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-09 17:49:00,579 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 17:49:00,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2170 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 17:49:00,695 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 17:49:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2170 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 17:49:02,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914056334] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 17:49:02,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 17:49:02,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2024-11-09 17:49:02,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306510946] [2024-11-09 17:49:02,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 17:49:02,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-11-09 17:49:02,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 17:49:02,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-11-09 17:49:02,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2024-11-09 17:49:02,602 INFO L87 Difference]: Start difference. First operand 1449 states and 1955 transitions. Second operand has 97 states, 97 states have (on average 2.195876288659794) internal successors, (213), 97 states have internal predecessors, (213), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 17:49:08,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 17:49:08,799 INFO L93 Difference]: Finished difference Result 4290 states and 5925 transitions. [2024-11-09 17:49:08,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-11-09 17:49:08,800 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.195876288659794) internal successors, (213), 97 states have internal predecessors, (213), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2024-11-09 17:49:08,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 17:49:08,808 INFO L225 Difference]: With dead ends: 4290 [2024-11-09 17:49:08,809 INFO L226 Difference]: Without dead ends: 2937 [2024-11-09 17:49:08,812 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2024-11-09 17:49:08,812 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 9095 mSDsluCounter, 1711 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 573 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9282 SdHoareTripleChecker+Valid, 1760 SdHoareTripleChecker+Invalid, 1928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 573 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 17:49:08,812 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9282 Valid, 1760 Invalid, 1928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [573 Valid, 1355 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 17:49:08,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2937 states. [2024-11-09 17:49:08,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2937 to 2937. [2024-11-09 17:49:08,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2937 states, 2747 states have (on average 1.30870040043684) internal successors, (3595), 2747 states have internal predecessors, (3595), 188 states have call successors, (188), 1 states have call predecessors, (188), 1 states have return successors, (188), 188 states have call predecessors, (188), 188 states have call successors, (188) [2024-11-09 17:49:08,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2937 states to 2937 states and 3971 transitions. [2024-11-09 17:49:08,869 INFO L78 Accepts]: Start accepts. Automaton has 2937 states and 3971 transitions. Word has length 121 [2024-11-09 17:49:08,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 17:49:08,870 INFO L471 AbstractCegarLoop]: Abstraction has 2937 states and 3971 transitions. [2024-11-09 17:49:08,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.195876288659794) internal successors, (213), 97 states have internal predecessors, (213), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 17:49:08,870 INFO L276 IsEmpty]: Start isEmpty. Operand 2937 states and 3971 transitions. [2024-11-09 17:49:08,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2024-11-09 17:49:08,871 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 17:49:08,871 INFO L215 NwaCegarLoop]: trace histogram [95, 94, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 17:49:08,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 17:49:09,071 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 17:49:09,072 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 17:49:09,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 17:49:09,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1329783720, now seen corresponding path program 3 times [2024-11-09 17:49:09,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 17:49:09,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300619061] [2024-11-09 17:49:09,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 17:49:09,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 17:49:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 17:49:13,050 INFO L134 CoverageAnalysis]: Checked inductivity of 8938 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 17:49:13,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 17:49:13,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300619061] [2024-11-09 17:49:13,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300619061] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 17:49:13,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212481756] [2024-11-09 17:49:13,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 17:49:13,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 17:49:13,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 17:49:13,052 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 17:49:13,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 17:49:13,172 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 17:49:13,172 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 17:49:13,173 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 17:49:13,177 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 17:49:13,281 INFO L134 CoverageAnalysis]: Checked inductivity of 8938 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8930 trivial. 0 not checked. [2024-11-09 17:49:13,281 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 17:49:13,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8938 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8930 trivial. 0 not checked. [2024-11-09 17:49:13,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212481756] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 17:49:13,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 17:49:13,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 6, 6] total 105 [2024-11-09 17:49:13,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822093363] [2024-11-09 17:49:13,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 17:49:13,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2024-11-09 17:49:13,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 17:49:13,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2024-11-09 17:49:13,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4878, Invalid=6042, Unknown=0, NotChecked=0, Total=10920 [2024-11-09 17:49:13,434 INFO L87 Difference]: Start difference. First operand 2937 states and 3971 transitions. Second operand has 105 states, 105 states have (on average 2.295238095238095) internal successors, (241), 105 states have internal predecessors, (241), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 17:49:40,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 17:49:40,052 INFO L93 Difference]: Finished difference Result 7157 states and 9859 transitions. [2024-11-09 17:49:40,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 393 states. [2024-11-09 17:49:40,052 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.295238095238095) internal successors, (241), 105 states have internal predecessors, (241), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 217 [2024-11-09 17:49:40,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 17:49:40,065 INFO L225 Difference]: With dead ends: 7157 [2024-11-09 17:49:40,065 INFO L226 Difference]: Without dead ends: 4412 [2024-11-09 17:49:40,079 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 823 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 397 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44221 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=49994, Invalid=108808, Unknown=0, NotChecked=0, Total=158802 [2024-11-09 17:49:40,079 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 13834 mSDsluCounter, 1542 mSDsCounter, 0 mSdLazyCounter, 1697 mSolverCounterSat, 606 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14025 SdHoareTripleChecker+Valid, 1586 SdHoareTripleChecker+Invalid, 2303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 606 IncrementalHoareTripleChecker+Valid, 1697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 17:49:40,080 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14025 Valid, 1586 Invalid, 2303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [606 Valid, 1697 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-09 17:49:40,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4412 states. [2024-11-09 17:49:40,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4412 to 4388. [2024-11-09 17:49:40,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4388 states, 4194 states have (on average 1.2553648068669527) internal successors, (5265), 4194 states have internal predecessors, (5265), 192 states have call successors, (192), 1 states have call predecessors, (192), 1 states have return successors, (192), 192 states have call predecessors, (192), 192 states have call successors, (192) [2024-11-09 17:49:40,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4388 states to 4388 states and 5649 transitions. [2024-11-09 17:49:40,160 INFO L78 Accepts]: Start accepts. Automaton has 4388 states and 5649 transitions. Word has length 217 [2024-11-09 17:49:40,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 17:49:40,161 INFO L471 AbstractCegarLoop]: Abstraction has 4388 states and 5649 transitions. [2024-11-09 17:49:40,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.295238095238095) internal successors, (241), 105 states have internal predecessors, (241), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 17:49:40,161 INFO L276 IsEmpty]: Start isEmpty. Operand 4388 states and 5649 transitions. [2024-11-09 17:49:40,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2024-11-09 17:49:40,162 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 17:49:40,162 INFO L215 NwaCegarLoop]: trace histogram [97, 96, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 17:49:40,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 17:49:40,366 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 17:49:40,367 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 17:49:40,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 17:49:40,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1018646434, now seen corresponding path program 4 times [2024-11-09 17:49:40,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 17:49:40,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823932751] [2024-11-09 17:49:40,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 17:49:40,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 17:49:40,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 17:49:44,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-09 17:49:44,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 17:49:44,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823932751] [2024-11-09 17:49:44,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823932751] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 17:49:44,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443505712] [2024-11-09 17:49:44,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 17:49:44,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 17:49:44,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 17:49:44,239 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) [2024-11-09 17:49:44,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 17:49:44,449 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 17:49:44,449 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 17:49:44,452 INFO L255 TraceCheckSpWp]: Trace formula consists of 1098 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-11-09 17:49:44,457 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 17:49:44,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-09 17:49:44,633 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 17:49:51,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-09 17:49:51,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443505712] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 17:49:51,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 17:49:51,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99, 99] total 197 [2024-11-09 17:49:51,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210673894] [2024-11-09 17:49:51,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 17:49:51,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 197 states [2024-11-09 17:49:51,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 17:49:51,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2024-11-09 17:49:51,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2024-11-09 17:49:51,592 INFO L87 Difference]: Start difference. First operand 4388 states and 5649 transitions. Second operand has 197 states, 197 states have (on average 2.0964467005076144) internal successors, (413), 197 states have internal predecessors, (413), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)