./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/modn.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc 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-fpi/modn.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b1b107a3e17c36933ddc5a5cff6ab95f9f0d71df794eec32ec4a28d109efd829 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-18 09:25:52,333 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-18 09:25:52,419 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-18 09:25:52,425 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-18 09:25:52,425 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-18 09:25:52,450 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-18 09:25:52,450 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-18 09:25:52,451 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-18 09:25:52,451 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-18 09:25:52,452 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-18 09:25:52,452 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-18 09:25:52,453 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-18 09:25:52,453 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-18 09:25:52,454 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-18 09:25:52,454 INFO L153 SettingsManager]: * Use SBE=true [2024-11-18 09:25:52,454 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-18 09:25:52,455 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-18 09:25:52,455 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-18 09:25:52,455 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-18 09:25:52,456 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-18 09:25:52,456 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-18 09:25:52,457 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-18 09:25:52,457 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-18 09:25:52,457 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-18 09:25:52,458 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-18 09:25:52,458 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-18 09:25:52,458 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-18 09:25:52,458 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-18 09:25:52,459 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-18 09:25:52,459 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-18 09:25:52,459 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-18 09:25:52,460 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-18 09:25:52,460 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 09:25:52,460 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-18 09:25:52,461 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-18 09:25:52,461 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-18 09:25:52,461 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-18 09:25:52,462 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-18 09:25:52,462 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-18 09:25:52,462 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-18 09:25:52,463 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-18 09:25:52,464 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-18 09:25:52,464 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1b107a3e17c36933ddc5a5cff6ab95f9f0d71df794eec32ec4a28d109efd829 [2024-11-18 09:25:52,703 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-18 09:25:52,724 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-18 09:25:52,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-18 09:25:52,728 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-18 09:25:52,729 INFO L274 PluginConnector]: CDTParser initialized [2024-11-18 09:25:52,730 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/modn.c [2024-11-18 09:25:54,183 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-18 09:25:54,346 INFO L384 CDTParser]: Found 1 translation units. [2024-11-18 09:25:54,347 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/modn.c [2024-11-18 09:25:54,354 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34cf1e5a2/3fbc54d1aba24fdcbf61b55f3d6ea228/FLAG8fa355b07 [2024-11-18 09:25:54,747 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34cf1e5a2/3fbc54d1aba24fdcbf61b55f3d6ea228 [2024-11-18 09:25:54,749 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-18 09:25:54,752 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-18 09:25:54,754 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-18 09:25:54,754 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-18 09:25:54,761 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-18 09:25:54,761 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:25:54" (1/1) ... [2024-11-18 09:25:54,762 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a0cc508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:25:54, skipping insertion in model container [2024-11-18 09:25:54,762 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:25:54" (1/1) ... [2024-11-18 09:25:54,784 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-18 09:25:54,957 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-fpi/modn.c[587,600] [2024-11-18 09:25:54,977 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 09:25:54,984 INFO L200 MainTranslator]: Completed pre-run [2024-11-18 09:25:54,994 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-fpi/modn.c[587,600] [2024-11-18 09:25:55,000 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 09:25:55,016 INFO L204 MainTranslator]: Completed translation [2024-11-18 09:25:55,016 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:25:55 WrapperNode [2024-11-18 09:25:55,016 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-18 09:25:55,018 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-18 09:25:55,018 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-18 09:25:55,018 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-18 09:25:55,025 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:25:55" (1/1) ... [2024-11-18 09:25:55,032 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:25:55" (1/1) ... [2024-11-18 09:25:55,056 INFO L138 Inliner]: procedures = 17, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 78 [2024-11-18 09:25:55,057 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-18 09:25:55,058 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-18 09:25:55,058 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-18 09:25:55,058 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-18 09:25:55,070 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:25:55" (1/1) ... [2024-11-18 09:25:55,071 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:25:55" (1/1) ... [2024-11-18 09:25:55,074 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:25:55" (1/1) ... [2024-11-18 09:25:55,092 INFO L175 MemorySlicer]: Split 15 memory accesses to 4 slices as follows [2, 4, 7, 2]. 47 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 0, 7, 0]. The 3 writes are split as follows [0, 2, 0, 1]. [2024-11-18 09:25:55,093 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:25:55" (1/1) ... [2024-11-18 09:25:55,093 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:25:55" (1/1) ... [2024-11-18 09:25:55,098 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:25:55" (1/1) ... [2024-11-18 09:25:55,109 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:25:55" (1/1) ... [2024-11-18 09:25:55,111 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:25:55" (1/1) ... [2024-11-18 09:25:55,115 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:25:55" (1/1) ... [2024-11-18 09:25:55,117 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-18 09:25:55,118 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-18 09:25:55,118 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-18 09:25:55,118 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-18 09:25:55,122 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:25:55" (1/1) ... [2024-11-18 09:25:55,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 09:25:55,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:25:55,173 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) [2024-11-18 09:25:55,180 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 [2024-11-18 09:25:55,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-18 09:25:55,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-18 09:25:55,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-18 09:25:55,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-18 09:25:55,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-18 09:25:55,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-18 09:25:55,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-18 09:25:55,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-18 09:25:55,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-18 09:25:55,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-18 09:25:55,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-18 09:25:55,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-18 09:25:55,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-18 09:25:55,232 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-18 09:25:55,232 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-18 09:25:55,232 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-18 09:25:55,232 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-18 09:25:55,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-18 09:25:55,332 INFO L238 CfgBuilder]: Building ICFG [2024-11-18 09:25:55,335 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-18 09:25:55,517 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-18 09:25:55,518 INFO L287 CfgBuilder]: Performing block encoding [2024-11-18 09:25:55,538 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-18 09:25:55,538 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-18 09:25:55,538 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:25:55 BoogieIcfgContainer [2024-11-18 09:25:55,539 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-18 09:25:55,542 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-18 09:25:55,543 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-18 09:25:55,546 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-18 09:25:55,547 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 09:25:54" (1/3) ... [2024-11-18 09:25:55,547 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1962ced1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:25:55, skipping insertion in model container [2024-11-18 09:25:55,548 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:25:55" (2/3) ... [2024-11-18 09:25:55,549 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1962ced1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:25:55, skipping insertion in model container [2024-11-18 09:25:55,549 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:25:55" (3/3) ... [2024-11-18 09:25:55,550 INFO L112 eAbstractionObserver]: Analyzing ICFG modn.c [2024-11-18 09:25:55,567 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-18 09:25:55,567 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-18 09:25:55,633 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-18 09:25:55,640 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;@27e94cd7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-18 09:25:55,641 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-18 09:25:55,673 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:25:55,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-18 09:25:55,685 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:25:55,686 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:25:55,686 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:25:55,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:25:55,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2024-11-18 09:25:55,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:25:55,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912257490] [2024-11-18 09:25:55,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:25:55,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:25:55,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:25:55,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:25:55,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:25:55,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912257490] [2024-11-18 09:25:55,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912257490] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 09:25:55,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 09:25:55,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-18 09:25:55,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539897354] [2024-11-18 09:25:55,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 09:25:55,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-18 09:25:55,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:25:55,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-18 09:25:55,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-18 09:25:55,911 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:25:55,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:25:55,925 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2024-11-18 09:25:55,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-18 09:25:55,926 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-18 09:25:55,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:25:55,932 INFO L225 Difference]: With dead ends: 38 [2024-11-18 09:25:55,932 INFO L226 Difference]: Without dead ends: 17 [2024-11-18 09:25:55,935 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 [2024-11-18 09:25:55,938 INFO L432 NwaCegarLoop]: 24 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, 24 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 [2024-11-18 09:25:55,940 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 09:25:55,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-18 09:25:55,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-18 09:25:55,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:25:55,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2024-11-18 09:25:55,966 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2024-11-18 09:25:55,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:25:55,967 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2024-11-18 09:25:55,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:25:55,967 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2024-11-18 09:25:55,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-18 09:25:55,968 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:25:55,968 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:25:55,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-18 09:25:55,969 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:25:55,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:25:55,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2024-11-18 09:25:55,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:25:55,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336301438] [2024-11-18 09:25:55,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:25:55,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:25:56,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:25:56,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:25:56,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:25:56,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336301438] [2024-11-18 09:25:56,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336301438] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 09:25:56,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 09:25:56,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-18 09:25:56,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894897609] [2024-11-18 09:25:56,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 09:25:56,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-18 09:25:56,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:25:56,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-18 09:25:56,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-18 09:25:56,165 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:25:56,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:25:56,224 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2024-11-18 09:25:56,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-18 09:25:56,225 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-18 09:25:56,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:25:56,226 INFO L225 Difference]: With dead ends: 37 [2024-11-18 09:25:56,226 INFO L226 Difference]: Without dead ends: 27 [2024-11-18 09:25:56,226 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-18 09:25:56,228 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 09:25:56,228 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 15 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 09:25:56,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-18 09:25:56,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2024-11-18 09:25:56,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:25:56,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2024-11-18 09:25:56,239 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2024-11-18 09:25:56,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:25:56,240 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2024-11-18 09:25:56,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:25:56,240 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2024-11-18 09:25:56,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-18 09:25:56,241 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:25:56,241 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:25:56,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-18 09:25:56,241 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:25:56,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:25:56,242 INFO L85 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2024-11-18 09:25:56,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:25:56,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723929936] [2024-11-18 09:25:56,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:25:56,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:25:56,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:25:57,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:25:57,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:25:57,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723929936] [2024-11-18 09:25:57,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723929936] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:25:57,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092287051] [2024-11-18 09:25:57,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:25:57,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:25:57,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:25:57,233 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) [2024-11-18 09:25:57,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-18 09:25:57,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:25:57,344 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-18 09:25:57,351 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:25:57,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 09:25:57,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-11-18 09:25:57,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 09:25:57,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:25:57,748 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:25:57,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 225 [2024-11-18 09:25:57,928 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:25:57,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 225 treesize of output 243 [2024-11-18 09:25:58,127 INFO L349 Elim1Store]: treesize reduction 16, result has 55.6 percent of original size [2024-11-18 09:25:58,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 51 [2024-11-18 09:25:58,158 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:25:58,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2024-11-18 09:26:10,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:26:10,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092287051] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:26:10,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:26:10,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2024-11-18 09:26:10,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746012075] [2024-11-18 09:26:10,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:26:10,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-18 09:26:10,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:26:10,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-18 09:26:10,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=464, Unknown=2, NotChecked=0, Total=600 [2024-11-18 09:26:10,629 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:26:22,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:26:22,712 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2024-11-18 09:26:22,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-18 09:26:22,714 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-18 09:26:22,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:26:22,718 INFO L225 Difference]: With dead ends: 62 [2024-11-18 09:26:22,718 INFO L226 Difference]: Without dead ends: 60 [2024-11-18 09:26:22,720 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=352, Invalid=906, Unknown=2, NotChecked=0, Total=1260 [2024-11-18 09:26:22,721 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 174 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-11-18 09:26:22,721 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 78 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2024-11-18 09:26:22,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-18 09:26:22,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 28. [2024-11-18 09:26:22,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:26:22,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2024-11-18 09:26:22,735 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2024-11-18 09:26:22,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:26:22,736 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2024-11-18 09:26:22,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:26:22,736 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2024-11-18 09:26:22,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-18 09:26:22,737 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:26:22,737 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:26:22,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-18 09:26:22,940 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 [2024-11-18 09:26:22,941 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:26:22,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:26:22,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1174519208, now seen corresponding path program 2 times [2024-11-18 09:26:22,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:26:22,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850719470] [2024-11-18 09:26:22,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 09:26:22,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:26:22,973 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 09:26:22,973 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:26:24,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:26:24,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:26:24,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850719470] [2024-11-18 09:26:24,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850719470] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:26:24,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886793432] [2024-11-18 09:26:24,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 09:26:24,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:26:24,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:26:24,572 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) [2024-11-18 09:26:24,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-18 09:26:24,625 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 09:26:24,625 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:26:24,626 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-18 09:26:24,627 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:26:26,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:26:26,601 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:26:28,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:26:28,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886793432] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:26:28,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:26:28,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-18 09:26:28,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250063942] [2024-11-18 09:26:28,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:26:28,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-18 09:26:28,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:26:28,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-18 09:26:28,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-18 09:26:28,525 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:26:34,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:26:34,049 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2024-11-18 09:26:34,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-18 09:26:34,050 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-18 09:26:34,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:26:34,051 INFO L225 Difference]: With dead ends: 58 [2024-11-18 09:26:34,051 INFO L226 Difference]: Without dead ends: 51 [2024-11-18 09:26:34,051 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-11-18 09:26:34,052 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 60 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-11-18 09:26:34,052 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 64 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2024-11-18 09:26:34,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-18 09:26:34,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2024-11-18 09:26:34,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:26:34,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2024-11-18 09:26:34,060 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2024-11-18 09:26:34,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:26:34,060 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2024-11-18 09:26:34,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:26:34,061 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2024-11-18 09:26:34,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-18 09:26:34,061 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:26:34,061 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:26:34,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-18 09:26:34,262 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-18 09:26:34,262 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:26:34,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:26:34,263 INFO L85 PathProgramCache]: Analyzing trace with hash 798963152, now seen corresponding path program 1 times [2024-11-18 09:26:34,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:26:34,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003139552] [2024-11-18 09:26:34,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:26:34,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:26:34,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:26:35,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-18 09:26:35,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:26:35,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003139552] [2024-11-18 09:26:35,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003139552] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:26:35,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942053165] [2024-11-18 09:26:35,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:26:35,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:26:35,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:26:35,864 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) [2024-11-18 09:26:35,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-18 09:26:35,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:26:35,921 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-18 09:26:35,922 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:26:38,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-18 09:26:38,128 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:26:39,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-18 09:26:39,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942053165] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:26:39,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:26:39,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-18 09:26:39,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595554231] [2024-11-18 09:26:39,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:26:39,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-18 09:26:39,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:26:39,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-18 09:26:39,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-18 09:26:39,874 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:26:42,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:26:42,206 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2024-11-18 09:26:42,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-18 09:26:42,207 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-18 09:26:42,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:26:42,207 INFO L225 Difference]: With dead ends: 58 [2024-11-18 09:26:42,207 INFO L226 Difference]: Without dead ends: 37 [2024-11-18 09:26:42,208 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-11-18 09:26:42,209 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 29 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-18 09:26:42,209 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 39 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-18 09:26:42,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-18 09:26:42,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 23. [2024-11-18 09:26:42,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:26:42,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2024-11-18 09:26:42,215 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2024-11-18 09:26:42,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:26:42,215 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2024-11-18 09:26:42,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:26:42,215 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2024-11-18 09:26:42,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-18 09:26:42,216 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:26:42,216 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:26:42,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-18 09:26:42,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:26:42,417 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:26:42,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:26:42,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1786143722, now seen corresponding path program 3 times [2024-11-18 09:26:42,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:26:42,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011533843] [2024-11-18 09:26:42,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 09:26:42,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:26:42,458 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-18 09:26:42,459 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-18 09:26:42,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1243498450] [2024-11-18 09:26:42,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 09:26:42,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:26:42,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:26:42,465 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) [2024-11-18 09:26:42,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-18 09:26:42,542 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-18 09:26:42,542 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:26:42,543 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-18 09:26:42,548 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:26:43,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 09:26:43,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-18 09:26:45,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-18 09:26:48,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-18 09:26:50,594 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2024-11-18 09:26:50,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2024-11-18 09:26:53,810 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-18 09:26:53,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2024-11-18 09:26:54,450 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:26:54,450 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:27:02,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 225 [2024-11-18 09:27:02,733 INFO L224 Elim1Store]: Index analysis took 224 ms [2024-11-18 09:27:03,016 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:27:03,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 225 treesize of output 243 [2024-11-18 09:27:07,184 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:27:07,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 290 treesize of output 284 [2024-11-18 09:27:15,997 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:27:15,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:27:15,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011533843] [2024-11-18 09:27:15,998 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 09:27:15,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243498450] [2024-11-18 09:27:15,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243498450] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:27:15,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-18 09:27:15,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2024-11-18 09:27:15,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352703768] [2024-11-18 09:27:15,999 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-18 09:27:15,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-18 09:27:15,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:27:16,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-18 09:27:16,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=531, Unknown=1, NotChecked=0, Total=650 [2024-11-18 09:27:16,001 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:27:32,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:27:32,190 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2024-11-18 09:27:32,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-18 09:27:32,190 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-18 09:27:32,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:27:32,191 INFO L225 Difference]: With dead ends: 52 [2024-11-18 09:27:32,191 INFO L226 Difference]: Without dead ends: 50 [2024-11-18 09:27:32,192 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=278, Invalid=911, Unknown=1, NotChecked=0, Total=1190 [2024-11-18 09:27:32,193 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 160 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2024-11-18 09:27:32,193 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 110 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2024-11-18 09:27:32,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-18 09:27:32,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 34. [2024-11-18 09:27:32,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:27:32,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2024-11-18 09:27:32,209 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 20 [2024-11-18 09:27:32,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:27:32,210 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2024-11-18 09:27:32,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:27:32,210 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2024-11-18 09:27:32,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-18 09:27:32,210 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:27:32,210 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:27:32,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-18 09:27:32,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:27:32,411 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:27:32,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:27:32,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1598333292, now seen corresponding path program 4 times [2024-11-18 09:27:32,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:27:32,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563921539] [2024-11-18 09:27:32,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 09:27:32,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:27:32,435 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 09:27:32,435 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat