./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy2_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy2_ground-2.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 910d8e768520d514eafd11bd6e0d202501f1eee040b6e70d07e33c173cc4a1ca --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-13 21:56:17,522 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 21:56:17,606 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-13 21:56:17,611 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 21:56:17,615 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 21:56:17,643 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 21:56:17,644 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 21:56:17,644 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 21:56:17,645 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 21:56:17,645 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 21:56:17,646 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 21:56:17,646 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 21:56:17,647 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 21:56:17,647 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 21:56:17,649 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 21:56:17,650 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 21:56:17,650 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 21:56:17,650 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 21:56:17,651 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 21:56:17,651 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 21:56:17,651 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 21:56:17,652 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 21:56:17,652 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 21:56:17,652 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 21:56:17,656 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 21:56:17,656 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 21:56:17,657 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 21:56:17,657 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 21:56:17,657 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 21:56:17,657 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 21:56:17,658 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 21:56:17,658 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 21:56:17,658 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 21:56:17,658 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 21:56:17,658 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 21:56:17,658 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 21:56:17,659 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 21:56:17,659 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 21:56:17,659 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 21:56:17,659 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 21:56:17,660 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 21:56:17,660 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 21:56:17,660 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 910d8e768520d514eafd11bd6e0d202501f1eee040b6e70d07e33c173cc4a1ca [2024-10-13 21:56:17,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 21:56:17,969 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 21:56:17,972 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 21:56:17,973 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 21:56:17,974 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 21:56:17,975 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy2_ground-2.i [2024-10-13 21:56:19,372 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 21:56:19,586 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 21:56:19,589 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy2_ground-2.i [2024-10-13 21:56:19,600 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/563ec5b62/cf6b826c8b5e418682445ba78d77b64e/FLAG59a0ce9c6 [2024-10-13 21:56:19,614 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/563ec5b62/cf6b826c8b5e418682445ba78d77b64e [2024-10-13 21:56:19,617 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 21:56:19,619 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 21:56:19,622 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 21:56:19,622 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 21:56:19,628 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 21:56:19,629 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:56:19" (1/1) ... [2024-10-13 21:56:19,630 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27ab660f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:56:19, skipping insertion in model container [2024-10-13 21:56:19,632 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:56:19" (1/1) ... [2024-10-13 21:56:19,653 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 21:56:19,807 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy2_ground-2.i[816,829] [2024-10-13 21:56:19,822 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 21:56:19,832 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 21:56:19,845 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy2_ground-2.i[816,829] [2024-10-13 21:56:19,862 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 21:56:19,882 INFO L204 MainTranslator]: Completed translation [2024-10-13 21:56:19,883 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:56:19 WrapperNode [2024-10-13 21:56:19,883 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 21:56:19,884 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 21:56:19,885 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 21:56:19,885 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 21:56:19,892 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:56:19" (1/1) ... [2024-10-13 21:56:19,899 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:56:19" (1/1) ... [2024-10-13 21:56:19,920 INFO L138 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80 [2024-10-13 21:56:19,921 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 21:56:19,922 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 21:56:19,922 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 21:56:19,922 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 21:56:19,933 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:56:19" (1/1) ... [2024-10-13 21:56:19,933 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:56:19" (1/1) ... [2024-10-13 21:56:19,936 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:56:19" (1/1) ... [2024-10-13 21:56:19,954 INFO L175 MemorySlicer]: Split 9 memory accesses to 4 slices as follows [2, 3, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-10-13 21:56:19,954 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:56:19" (1/1) ... [2024-10-13 21:56:19,954 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:56:19" (1/1) ... [2024-10-13 21:56:19,959 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:56:19" (1/1) ... [2024-10-13 21:56:19,963 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:56:19" (1/1) ... [2024-10-13 21:56:19,964 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:56:19" (1/1) ... [2024-10-13 21:56:19,965 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:56:19" (1/1) ... [2024-10-13 21:56:19,967 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 21:56:19,968 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 21:56:19,968 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 21:56:19,969 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 21:56:19,969 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:56:19" (1/1) ... [2024-10-13 21:56:19,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 21:56:19,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 21:56:20,009 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-13 21:56:20,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-13 21:56:20,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 21:56:20,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 21:56:20,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 21:56:20,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-13 21:56:20,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-13 21:56:20,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-13 21:56:20,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 21:56:20,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 21:56:20,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-13 21:56:20,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-13 21:56:20,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 21:56:20,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 21:56:20,073 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 21:56:20,073 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 21:56:20,073 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-13 21:56:20,073 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-13 21:56:20,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-13 21:56:20,191 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 21:56:20,197 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 21:56:20,429 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-10-13 21:56:20,430 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 21:56:20,467 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 21:56:20,467 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-13 21:56:20,468 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:56:20 BoogieIcfgContainer [2024-10-13 21:56:20,468 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 21:56:20,471 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 21:56:20,472 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 21:56:20,476 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 21:56:20,476 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:56:19" (1/3) ... [2024-10-13 21:56:20,478 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b3255ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:56:20, skipping insertion in model container [2024-10-13 21:56:20,478 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:56:19" (2/3) ... [2024-10-13 21:56:20,478 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b3255ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:56:20, skipping insertion in model container [2024-10-13 21:56:20,478 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:56:20" (3/3) ... [2024-10-13 21:56:20,480 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy2_ground-2.i [2024-10-13 21:56:20,497 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 21:56:20,497 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-13 21:56:20,563 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 21:56:20,570 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@699e0e36, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 21:56:20,571 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-13 21:56:20,575 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 states have internal predecessors, (22), 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) [2024-10-13 21:56:20,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-13 21:56:20,581 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 21:56:20,581 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 21:56:20,582 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 21:56:20,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 21:56:20,588 INFO L85 PathProgramCache]: Analyzing trace with hash 128561044, now seen corresponding path program 1 times [2024-10-13 21:56:20,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 21:56:20,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474006197] [2024-10-13 21:56:20,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:56:20,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 21:56:20,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:56:20,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 21:56:20,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 21:56:20,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474006197] [2024-10-13 21:56:20,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474006197] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 21:56:20,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 21:56:20,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 21:56:20,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27146182] [2024-10-13 21:56:20,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 21:56:20,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 21:56:20,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 21:56:20,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 21:56:20,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 21:56:20,898 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 states have internal predecessors, (22), 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 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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) [2024-10-13 21:56:20,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 21:56:20,929 INFO L93 Difference]: Finished difference Result 27 states and 43 transitions. [2024-10-13 21:56:20,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 21:56:20,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 10 [2024-10-13 21:56:20,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 21:56:20,938 INFO L225 Difference]: With dead ends: 27 [2024-10-13 21:56:20,938 INFO L226 Difference]: Without dead ends: 13 [2024-10-13 21:56:20,940 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 21:56:20,943 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 21:56:20,944 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 21:56:20,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-10-13 21:56:20,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-10-13 21:56:20,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 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) [2024-10-13 21:56:20,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2024-10-13 21:56:20,972 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 10 [2024-10-13 21:56:20,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 21:56:20,972 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2024-10-13 21:56:20,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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) [2024-10-13 21:56:20,972 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2024-10-13 21:56:20,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-13 21:56:20,973 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 21:56:20,973 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 21:56:20,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 21:56:20,973 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 21:56:20,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 21:56:20,974 INFO L85 PathProgramCache]: Analyzing trace with hash -162311142, now seen corresponding path program 1 times [2024-10-13 21:56:20,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 21:56:20,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777950154] [2024-10-13 21:56:20,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:56:20,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 21:56:21,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:56:21,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 21:56:21,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 21:56:21,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777950154] [2024-10-13 21:56:21,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777950154] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 21:56:21,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882719855] [2024-10-13 21:56:21,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:56:21,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:56:21,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 21:56:21,108 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 21:56:21,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 21:56:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:56:21,191 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-13 21:56:21,195 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 21:56:21,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 21:56:21,230 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 21:56:21,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882719855] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 21:56:21,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 21:56:21,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-10-13 21:56:21,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147465775] [2024-10-13 21:56:21,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 21:56:21,233 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 21:56:21,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 21:56:21,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 21:56:21,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 21:56:21,235 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2024-10-13 21:56:21,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 21:56:21,269 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2024-10-13 21:56:21,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 21:56:21,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2024-10-13 21:56:21,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 21:56:21,271 INFO L225 Difference]: With dead ends: 23 [2024-10-13 21:56:21,271 INFO L226 Difference]: Without dead ends: 15 [2024-10-13 21:56:21,271 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 21:56:21,272 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 21:56:21,273 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 21:56:21,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-10-13 21:56:21,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-10-13 21:56:21,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 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) [2024-10-13 21:56:21,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2024-10-13 21:56:21,277 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 11 [2024-10-13 21:56:21,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 21:56:21,277 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2024-10-13 21:56:21,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2024-10-13 21:56:21,278 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2024-10-13 21:56:21,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-13 21:56:21,278 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 21:56:21,279 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 21:56:21,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-13 21:56:21,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:56:21,480 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 21:56:21,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 21:56:21,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1034537550, now seen corresponding path program 1 times [2024-10-13 21:56:21,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 21:56:21,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068375456] [2024-10-13 21:56:21,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:56:21,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 21:56:21,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:56:21,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 21:56:21,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 21:56:21,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068375456] [2024-10-13 21:56:21,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068375456] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 21:56:21,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807107136] [2024-10-13 21:56:21,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:56:21,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:56:21,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 21:56:21,587 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 21:56:21,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 21:56:21,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:56:21,675 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-13 21:56:21,677 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 21:56:21,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 21:56:21,714 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 21:56:21,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 21:56:21,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807107136] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 21:56:21,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 21:56:21,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-13 21:56:21,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001059566] [2024-10-13 21:56:21,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 21:56:21,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 21:56:21,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 21:56:21,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 21:56:21,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-13 21:56:21,747 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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) [2024-10-13 21:56:21,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 21:56:21,789 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2024-10-13 21:56:21,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 21:56:21,790 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 13 [2024-10-13 21:56:21,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 21:56:21,790 INFO L225 Difference]: With dead ends: 30 [2024-10-13 21:56:21,790 INFO L226 Difference]: Without dead ends: 18 [2024-10-13 21:56:21,791 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-13 21:56:21,792 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 21:56:21,792 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 21:56:21,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-10-13 21:56:21,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-10-13 21:56:21,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 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) [2024-10-13 21:56:21,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2024-10-13 21:56:21,799 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2024-10-13 21:56:21,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 21:56:21,799 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2024-10-13 21:56:21,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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) [2024-10-13 21:56:21,800 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2024-10-13 21:56:21,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-13 21:56:21,800 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 21:56:21,800 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 21:56:21,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-13 21:56:22,001 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-10-13 21:56:22,001 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 21:56:22,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 21:56:22,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1071071032, now seen corresponding path program 2 times [2024-10-13 21:56:22,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 21:56:22,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15958417] [2024-10-13 21:56:22,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:56:22,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 21:56:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:56:22,121 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-13 21:56:22,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 21:56:22,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15958417] [2024-10-13 21:56:22,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15958417] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 21:56:22,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613792354] [2024-10-13 21:56:22,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 21:56:22,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:56:22,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 21:56:22,126 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 21:56:22,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 21:56:22,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 21:56:22,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 21:56:22,246 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 21:56:22,248 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 21:56:22,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 21:56:22,363 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 21:56:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 21:56:22,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613792354] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 21:56:22,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 21:56:22,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2024-10-13 21:56:22,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500452124] [2024-10-13 21:56:22,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 21:56:22,448 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-13 21:56:22,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 21:56:22,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-13 21:56:22,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-10-13 21:56:22,451 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 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) [2024-10-13 21:56:22,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 21:56:22,510 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2024-10-13 21:56:22,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-13 21:56:22,511 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 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 16 [2024-10-13 21:56:22,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 21:56:22,511 INFO L225 Difference]: With dead ends: 38 [2024-10-13 21:56:22,512 INFO L226 Difference]: Without dead ends: 26 [2024-10-13 21:56:22,512 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-10-13 21:56:22,515 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 21:56:22,515 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 21:56:22,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-10-13 21:56:22,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-10-13 21:56:22,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 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) [2024-10-13 21:56:22,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2024-10-13 21:56:22,520 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 16 [2024-10-13 21:56:22,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 21:56:22,521 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2024-10-13 21:56:22,521 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 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) [2024-10-13 21:56:22,521 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2024-10-13 21:56:22,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-13 21:56:22,522 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 21:56:22,522 INFO L215 NwaCegarLoop]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 21:56:22,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-13 21:56:22,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:56:22,727 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 21:56:22,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 21:56:22,727 INFO L85 PathProgramCache]: Analyzing trace with hash 436827028, now seen corresponding path program 3 times [2024-10-13 21:56:22,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 21:56:22,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579857558] [2024-10-13 21:56:22,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:56:22,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 21:56:22,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:56:23,053 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 21:56:23,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 21:56:23,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579857558] [2024-10-13 21:56:23,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579857558] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 21:56:23,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637499408] [2024-10-13 21:56:23,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 21:56:23,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:56:23,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 21:56:23,056 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 21:56:23,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 21:56:23,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-13 21:56:23,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 21:56:23,142 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-13 21:56:23,143 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 21:56:23,188 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-10-13 21:56:23,188 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 21:56:23,239 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-10-13 21:56:23,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637499408] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 21:56:23,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 21:56:23,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5] total 19 [2024-10-13 21:56:23,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540117130] [2024-10-13 21:56:23,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 21:56:23,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-13 21:56:23,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 21:56:23,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-13 21:56:23,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2024-10-13 21:56:23,243 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 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) [2024-10-13 21:56:23,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 21:56:23,327 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2024-10-13 21:56:23,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-13 21:56:23,328 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 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 24 [2024-10-13 21:56:23,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 21:56:23,329 INFO L225 Difference]: With dead ends: 49 [2024-10-13 21:56:23,329 INFO L226 Difference]: Without dead ends: 35 [2024-10-13 21:56:23,329 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2024-10-13 21:56:23,330 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 21:56:23,330 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 73 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 21:56:23,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-10-13 21:56:23,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-10-13 21:56:23,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 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) [2024-10-13 21:56:23,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2024-10-13 21:56:23,344 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 24 [2024-10-13 21:56:23,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 21:56:23,344 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2024-10-13 21:56:23,344 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 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) [2024-10-13 21:56:23,344 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2024-10-13 21:56:23,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-13 21:56:23,345 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 21:56:23,345 INFO L215 NwaCegarLoop]: trace histogram [11, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 21:56:23,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-13 21:56:23,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:56:23,546 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 21:56:23,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 21:56:23,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1098944486, now seen corresponding path program 4 times [2024-10-13 21:56:23,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 21:56:23,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901106538] [2024-10-13 21:56:23,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:56:23,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 21:56:23,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:56:23,881 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-10-13 21:56:23,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 21:56:23,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901106538] [2024-10-13 21:56:23,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901106538] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 21:56:23,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531121880] [2024-10-13 21:56:23,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 21:56:23,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:56:23,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 21:56:23,884 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 21:56:23,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 21:56:23,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 21:56:23,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 21:56:23,995 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-13 21:56:23,997 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 21:56:24,035 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-10-13 21:56:24,036 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 21:56:24,296 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-10-13 21:56:24,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531121880] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 21:56:24,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 21:56:24,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2024-10-13 21:56:24,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145162824] [2024-10-13 21:56:24,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 21:56:24,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-13 21:56:24,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 21:56:24,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-13 21:56:24,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2024-10-13 21:56:24,301 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 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) [2024-10-13 21:56:24,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 21:56:24,357 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2024-10-13 21:56:24,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-13 21:56:24,358 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 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) Word has length 33 [2024-10-13 21:56:24,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 21:56:24,359 INFO L225 Difference]: With dead ends: 70 [2024-10-13 21:56:24,360 INFO L226 Difference]: Without dead ends: 48 [2024-10-13 21:56:24,360 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2024-10-13 21:56:24,361 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 21:56:24,363 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 21:56:24,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-10-13 21:56:24,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-10-13 21:56:24,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 states have internal predecessors, (51), 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) [2024-10-13 21:56:24,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2024-10-13 21:56:24,373 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 33 [2024-10-13 21:56:24,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 21:56:24,376 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2024-10-13 21:56:24,377 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 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) [2024-10-13 21:56:24,377 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2024-10-13 21:56:24,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-13 21:56:24,378 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 21:56:24,378 INFO L215 NwaCegarLoop]: trace histogram [24, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 21:56:24,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-13 21:56:24,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:56:24,579 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 21:56:24,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 21:56:24,579 INFO L85 PathProgramCache]: Analyzing trace with hash 162670932, now seen corresponding path program 5 times [2024-10-13 21:56:24,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 21:56:24,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811592668] [2024-10-13 21:56:24,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:56:24,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 21:56:24,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:56:25,374 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-10-13 21:56:25,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 21:56:25,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811592668] [2024-10-13 21:56:25,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811592668] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 21:56:25,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456274557] [2024-10-13 21:56:25,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 21:56:25,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:56:25,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 21:56:25,377 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) [2024-10-13 21:56:25,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-13 21:57:00,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-10-13 21:57:00,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 21:57:00,973 INFO L255 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 21:57:00,975 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 21:57:01,117 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2024-10-13 21:57:01,117 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 21:57:01,305 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2024-10-13 21:57:01,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456274557] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 21:57:01,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 21:57:01,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9, 9] total 41 [2024-10-13 21:57:01,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130944498] [2024-10-13 21:57:01,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 21:57:01,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-10-13 21:57:01,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 21:57:01,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-10-13 21:57:01,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2024-10-13 21:57:01,313 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 41 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 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) [2024-10-13 21:57:01,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 21:57:01,433 INFO L93 Difference]: Finished difference Result 87 states and 109 transitions. [2024-10-13 21:57:01,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-10-13 21:57:01,433 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 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 46 [2024-10-13 21:57:01,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 21:57:01,434 INFO L225 Difference]: With dead ends: 87 [2024-10-13 21:57:01,434 INFO L226 Difference]: Without dead ends: 65 [2024-10-13 21:57:01,435 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2024-10-13 21:57:01,436 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 21:57:01,436 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 21:57:01,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-10-13 21:57:01,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-10-13 21:57:01,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 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) [2024-10-13 21:57:01,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2024-10-13 21:57:01,447 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 46 [2024-10-13 21:57:01,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 21:57:01,447 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2024-10-13 21:57:01,448 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 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) [2024-10-13 21:57:01,448 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2024-10-13 21:57:01,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-13 21:57:01,451 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 21:57:01,451 INFO L215 NwaCegarLoop]: trace histogram [25, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 21:57:01,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-13 21:57:01,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:57:01,652 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 21:57:01,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 21:57:01,652 INFO L85 PathProgramCache]: Analyzing trace with hash -2069334054, now seen corresponding path program 6 times [2024-10-13 21:57:01,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 21:57:01,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009705413] [2024-10-13 21:57:01,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:57:01,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 21:57:01,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:57:02,504 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-10-13 21:57:02,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 21:57:02,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009705413] [2024-10-13 21:57:02,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009705413] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 21:57:02,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390232863] [2024-10-13 21:57:02,505 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 21:57:02,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:57:02,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 21:57:02,507 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) [2024-10-13 21:57:02,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-13 21:57:07,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-10-13 21:57:07,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 21:57:07,890 INFO L255 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-13 21:57:07,896 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 21:57:08,229 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 25 proven. 105 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2024-10-13 21:57:08,229 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 21:57:08,737 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2024-10-13 21:57:08,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390232863] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 21:57:08,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 21:57:08,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 18, 17] total 59 [2024-10-13 21:57:08,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361314715] [2024-10-13 21:57:08,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 21:57:08,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-10-13 21:57:08,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 21:57:08,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-10-13 21:57:08,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=2521, Unknown=0, NotChecked=0, Total=3422 [2024-10-13 21:57:08,742 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 59 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 59 states have internal predecessors, (74), 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) [2024-10-13 21:57:08,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 21:57:08,934 INFO L93 Difference]: Finished difference Result 136 states and 174 transitions. [2024-10-13 21:57:08,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-10-13 21:57:08,934 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 59 states have internal predecessors, (74), 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 63 [2024-10-13 21:57:08,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 21:57:08,935 INFO L225 Difference]: With dead ends: 136 [2024-10-13 21:57:08,938 INFO L226 Difference]: Without dead ends: 98 [2024-10-13 21:57:08,939 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=901, Invalid=2521, Unknown=0, NotChecked=0, Total=3422 [2024-10-13 21:57:08,940 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 21:57:08,941 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 21:57:08,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-10-13 21:57:08,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2024-10-13 21:57:08,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.041237113402062) internal successors, (101), 97 states have internal predecessors, (101), 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) [2024-10-13 21:57:08,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 101 transitions. [2024-10-13 21:57:08,958 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 101 transitions. Word has length 63 [2024-10-13 21:57:08,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 21:57:08,958 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 101 transitions. [2024-10-13 21:57:08,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 59 states have internal predecessors, (74), 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) [2024-10-13 21:57:08,959 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 101 transitions. [2024-10-13 21:57:08,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-10-13 21:57:08,960 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 21:57:08,960 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 21:57:08,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-13 21:57:09,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:57:09,161 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 21:57:09,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 21:57:09,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1939727084, now seen corresponding path program 7 times [2024-10-13 21:57:09,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 21:57:09,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846331447] [2024-10-13 21:57:09,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:57:09,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 21:57:09,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:57:10,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2024-10-13 21:57:10,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 21:57:10,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846331447] [2024-10-13 21:57:10,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846331447] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 21:57:10,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952846997] [2024-10-13 21:57:10,159 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 21:57:10,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:57:10,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 21:57:10,163 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 21:57:10,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-13 21:57:10,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:57:10,413 INFO L255 TraceCheckSpWp]: Trace formula consists of 726 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-13 21:57:10,417 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 21:57:10,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2024-10-13 21:57:10,477 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 21:57:11,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2024-10-13 21:57:11,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952846997] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 21:57:11,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 21:57:11,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 56 [2024-10-13 21:57:11,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986319709] [2024-10-13 21:57:11,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 21:57:11,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-10-13 21:57:11,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 21:57:11,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-10-13 21:57:11,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2024-10-13 21:57:11,379 INFO L87 Difference]: Start difference. First operand 98 states and 101 transitions. Second operand has 57 states, 57 states have (on average 1.1929824561403508) internal successors, (68), 56 states have internal predecessors, (68), 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) [2024-10-13 21:57:11,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 21:57:11,460 INFO L93 Difference]: Finished difference Result 196 states and 229 transitions. [2024-10-13 21:57:11,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-10-13 21:57:11,461 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.1929824561403508) internal successors, (68), 56 states have internal predecessors, (68), 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 96 [2024-10-13 21:57:11,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 21:57:11,462 INFO L225 Difference]: With dead ends: 196 [2024-10-13 21:57:11,462 INFO L226 Difference]: Without dead ends: 126 [2024-10-13 21:57:11,465 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2024-10-13 21:57:11,465 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 21:57:11,466 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 21:57:11,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-10-13 21:57:11,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2024-10-13 21:57:11,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.032) internal successors, (129), 125 states have internal predecessors, (129), 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) [2024-10-13 21:57:11,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 129 transitions. [2024-10-13 21:57:11,476 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 129 transitions. Word has length 96 [2024-10-13 21:57:11,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 21:57:11,477 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 129 transitions. [2024-10-13 21:57:11,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.1929824561403508) internal successors, (68), 56 states have internal predecessors, (68), 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) [2024-10-13 21:57:11,477 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 129 transitions. [2024-10-13 21:57:11,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-10-13 21:57:11,478 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 21:57:11,478 INFO L215 NwaCegarLoop]: trace histogram [54, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 21:57:11,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-13 21:57:11,682 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-10-13 21:57:11,683 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 21:57:11,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 21:57:11,683 INFO L85 PathProgramCache]: Analyzing trace with hash 2067732372, now seen corresponding path program 8 times [2024-10-13 21:57:11,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 21:57:11,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240655294] [2024-10-13 21:57:11,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:57:11,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 21:57:11,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:57:14,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2024-10-13 21:57:14,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 21:57:14,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240655294] [2024-10-13 21:57:14,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240655294] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 21:57:14,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889706530] [2024-10-13 21:57:14,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 21:57:14,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:57:14,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 21:57:14,192 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 21:57:14,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-13 21:57:14,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 21:57:14,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 21:57:14,467 INFO L255 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-10-13 21:57:14,471 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 21:57:14,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2024-10-13 21:57:14,567 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 21:57:17,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2024-10-13 21:57:17,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889706530] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 21:57:17,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 21:57:17,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 112 [2024-10-13 21:57:17,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501268335] [2024-10-13 21:57:17,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 21:57:17,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2024-10-13 21:57:17,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 21:57:17,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2024-10-13 21:57:17,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2024-10-13 21:57:17,530 INFO L87 Difference]: Start difference. First operand 126 states and 129 transitions. Second operand has 113 states, 113 states have (on average 1.0973451327433628) internal successors, (124), 112 states have internal predecessors, (124), 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) [2024-10-13 21:57:17,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 21:57:17,689 INFO L93 Difference]: Finished difference Result 252 states and 313 transitions. [2024-10-13 21:57:17,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2024-10-13 21:57:17,690 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.0973451327433628) internal successors, (124), 112 states have internal predecessors, (124), 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 124 [2024-10-13 21:57:17,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 21:57:17,692 INFO L225 Difference]: With dead ends: 252 [2024-10-13 21:57:17,692 INFO L226 Difference]: Without dead ends: 182 [2024-10-13 21:57:17,695 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2024-10-13 21:57:17,695 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 21:57:17,696 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 21:57:17,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-10-13 21:57:17,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2024-10-13 21:57:17,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.022099447513812) internal successors, (185), 181 states have internal predecessors, (185), 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) [2024-10-13 21:57:17,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 185 transitions. [2024-10-13 21:57:17,717 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 185 transitions. Word has length 124 [2024-10-13 21:57:17,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 21:57:17,719 INFO L471 AbstractCegarLoop]: Abstraction has 182 states and 185 transitions. [2024-10-13 21:57:17,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.0973451327433628) internal successors, (124), 112 states have internal predecessors, (124), 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) [2024-10-13 21:57:17,719 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 185 transitions. [2024-10-13 21:57:17,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2024-10-13 21:57:17,724 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 21:57:17,725 INFO L215 NwaCegarLoop]: trace histogram [110, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 21:57:17,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-13 21:57:17,925 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-13 21:57:17,926 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 21:57:17,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 21:57:17,926 INFO L85 PathProgramCache]: Analyzing trace with hash 2061421716, now seen corresponding path program 9 times [2024-10-13 21:57:17,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 21:57:17,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138566749] [2024-10-13 21:57:17,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:57:17,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 21:57:18,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:57:25,130 INFO L134 CoverageAnalysis]: Checked inductivity of 7035 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2024-10-13 21:57:25,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 21:57:25,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138566749] [2024-10-13 21:57:25,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138566749] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 21:57:25,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961314630] [2024-10-13 21:57:25,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 21:57:25,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:57:25,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 21:57:25,132 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 21:57:25,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process