./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/string_concat-noarr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-invgen/string_concat-noarr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd --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 30a4b942034eaa47a8fcc8fdf4549d1d63a9a60d59b585da2a353c9626604750 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 15:44:31,766 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 15:44:31,866 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-13 15:44:31,879 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 15:44:31,879 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 15:44:31,917 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 15:44:31,918 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 15:44:31,918 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 15:44:31,918 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 15:44:31,918 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 15:44:31,918 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 15:44:31,918 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 15:44:31,919 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 15:44:31,919 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 15:44:31,919 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 15:44:31,919 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 15:44:31,919 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 15:44:31,919 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 15:44:31,919 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 15:44:31,920 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 15:44:31,920 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 15:44:31,920 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 15:44:31,920 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 15:44:31,920 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 15:44:31,920 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 15:44:31,920 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 15:44:31,920 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 15:44:31,920 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 15:44:31,923 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 15:44:31,923 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 15:44:31,924 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 15:44:31,924 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 15:44:31,924 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 15:44:31,924 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 15:44:31,924 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 15:44:31,924 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 15:44:31,925 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 15:44:31,925 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 15:44:31,925 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 15:44:31,925 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 15:44:31,925 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 15:44:31,925 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 15:44:31,925 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd 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 -> 30a4b942034eaa47a8fcc8fdf4549d1d63a9a60d59b585da2a353c9626604750 [2024-11-13 15:44:32,233 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 15:44:32,242 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 15:44:32,244 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 15:44:32,245 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 15:44:32,246 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 15:44:32,247 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/loop-invgen/string_concat-noarr.i Unable to find full path for "g++" [2024-11-13 15:44:34,153 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 15:44:34,393 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 15:44:34,394 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/sv-benchmarks/c/loop-invgen/string_concat-noarr.i [2024-11-13 15:44:34,404 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/data/431a4e616/943da6db231940caa292581c919ce405/FLAGea2b46663 [2024-11-13 15:44:34,418 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/data/431a4e616/943da6db231940caa292581c919ce405 [2024-11-13 15:44:34,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 15:44:34,422 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 15:44:34,424 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 15:44:34,424 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 15:44:34,428 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 15:44:34,429 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 03:44:34" (1/1) ... [2024-11-13 15:44:34,430 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32ed9439 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:44:34, skipping insertion in model container [2024-11-13 15:44:34,430 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 03:44:34" (1/1) ... [2024-11-13 15:44:34,445 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 15:44:34,603 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/sv-benchmarks/c/loop-invgen/string_concat-noarr.i[893,906] [2024-11-13 15:44:34,621 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 15:44:34,630 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 15:44:34,641 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/sv-benchmarks/c/loop-invgen/string_concat-noarr.i[893,906] [2024-11-13 15:44:34,645 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 15:44:34,662 INFO L204 MainTranslator]: Completed translation [2024-11-13 15:44:34,663 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:44:34 WrapperNode [2024-11-13 15:44:34,664 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 15:44:34,665 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 15:44:34,665 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 15:44:34,665 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 15:44:34,672 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:44:34" (1/1) ... [2024-11-13 15:44:34,680 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:44:34" (1/1) ... [2024-11-13 15:44:34,697 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 52 [2024-11-13 15:44:34,697 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 15:44:34,698 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 15:44:34,698 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 15:44:34,699 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 15:44:34,707 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:44:34" (1/1) ... [2024-11-13 15:44:34,708 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:44:34" (1/1) ... [2024-11-13 15:44:34,710 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:44:34" (1/1) ... [2024-11-13 15:44:34,724 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-13 15:44:34,724 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:44:34" (1/1) ... [2024-11-13 15:44:34,724 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:44:34" (1/1) ... [2024-11-13 15:44:34,726 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:44:34" (1/1) ... [2024-11-13 15:44:34,730 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:44:34" (1/1) ... [2024-11-13 15:44:34,731 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:44:34" (1/1) ... [2024-11-13 15:44:34,731 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:44:34" (1/1) ... [2024-11-13 15:44:34,732 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 15:44:34,733 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 15:44:34,733 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 15:44:34,734 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 15:44:34,734 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:44:34" (1/1) ... [2024-11-13 15:44:34,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 15:44:34,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:44:34,766 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 15:44:34,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 15:44:34,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 15:44:34,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 15:44:34,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 15:44:34,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 15:44:34,848 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 15:44:34,850 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 15:44:35,002 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-11-13 15:44:35,002 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 15:44:35,016 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 15:44:35,017 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-13 15:44:35,017 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 03:44:35 BoogieIcfgContainer [2024-11-13 15:44:35,018 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 15:44:35,021 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 15:44:35,022 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 15:44:35,026 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 15:44:35,027 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 03:44:34" (1/3) ... [2024-11-13 15:44:35,027 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f4459b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 03:44:35, skipping insertion in model container [2024-11-13 15:44:35,028 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:44:34" (2/3) ... [2024-11-13 15:44:35,028 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f4459b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 03:44:35, skipping insertion in model container [2024-11-13 15:44:35,028 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 03:44:35" (3/3) ... [2024-11-13 15:44:35,030 INFO L112 eAbstractionObserver]: Analyzing ICFG string_concat-noarr.i [2024-11-13 15:44:35,049 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 15:44:35,053 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG string_concat-noarr.i that has 1 procedures, 17 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-13 15:44:35,126 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 15:44:35,144 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;@2189c9ef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 15:44:35,144 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-13 15:44:35,150 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:44:35,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-13 15:44:35,157 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:44:35,157 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:44:35,160 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:44:35,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:44:35,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1300036048, now seen corresponding path program 1 times [2024-11-13 15:44:35,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:44:35,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531653544] [2024-11-13 15:44:35,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:44:35,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:44:35,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:44:35,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:44:35,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:44:35,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531653544] [2024-11-13 15:44:35,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531653544] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:44:35,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:44:35,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 15:44:35,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822409171] [2024-11-13 15:44:35,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:44:35,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-13 15:44:35,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:44:35,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-13 15:44:35,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-13 15:44:35,362 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:44:35,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:44:35,374 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2024-11-13 15:44:35,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-13 15:44:35,376 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2024-11-13 15:44:35,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:44:35,381 INFO L225 Difference]: With dead ends: 29 [2024-11-13 15:44:35,382 INFO L226 Difference]: Without dead ends: 12 [2024-11-13 15:44:35,384 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-13 15:44:35,387 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 15:44:35,388 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 15:44:35,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-11-13 15:44:35,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2024-11-13 15:44:35,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:44:35,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2024-11-13 15:44:35,418 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 9 [2024-11-13 15:44:35,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:44:35,419 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2024-11-13 15:44:35,419 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:44:35,419 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2024-11-13 15:44:35,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-13 15:44:35,420 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:44:35,420 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:44:35,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 15:44:35,420 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:44:35,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:44:35,421 INFO L85 PathProgramCache]: Analyzing trace with hash -313852524, now seen corresponding path program 1 times [2024-11-13 15:44:35,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:44:35,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798766590] [2024-11-13 15:44:35,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:44:35,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:44:35,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:44:35,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:44:35,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:44:35,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798766590] [2024-11-13 15:44:35,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798766590] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:44:35,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:44:35,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 15:44:35,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724646079] [2024-11-13 15:44:35,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:44:35,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 15:44:35,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:44:35,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 15:44:35,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:44:35,633 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2024-11-13 15:44:35,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:44:35,674 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2024-11-13 15:44:35,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 15:44:35,675 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 [2024-11-13 15:44:35,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:44:35,675 INFO L225 Difference]: With dead ends: 21 [2024-11-13 15:44:35,675 INFO L226 Difference]: Without dead ends: 17 [2024-11-13 15:44:35,676 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:44:35,677 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 15:44:35,677 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 15:44:35,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-13 15:44:35,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2024-11-13 15:44:35,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:44:35,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2024-11-13 15:44:35,681 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2024-11-13 15:44:35,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:44:35,681 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2024-11-13 15:44:35,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2024-11-13 15:44:35,681 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2024-11-13 15:44:35,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-13 15:44:35,682 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:44:35,682 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:44:35,682 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 15:44:35,682 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:44:35,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:44:35,687 INFO L85 PathProgramCache]: Analyzing trace with hash -919703057, now seen corresponding path program 1 times [2024-11-13 15:44:35,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:44:35,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374669369] [2024-11-13 15:44:35,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:44:35,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:44:35,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:44:35,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:44:35,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:44:35,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374669369] [2024-11-13 15:44:35,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374669369] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:44:35,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142659820] [2024-11-13 15:44:35,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:44:35,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:44:35,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:44:35,936 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:44:35,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 15:44:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:44:36,008 INFO L255 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 15:44:36,012 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:44:36,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:44:36,095 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:44:36,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:44:36,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142659820] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:44:36,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:44:36,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-13 15:44:36,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282450316] [2024-11-13 15:44:36,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:44:36,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 15:44:36,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:44:36,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 15:44:36,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-13 15:44:36,193 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:44:36,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:44:36,312 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2024-11-13 15:44:36,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 15:44:36,313 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 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 [2024-11-13 15:44:36,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:44:36,314 INFO L225 Difference]: With dead ends: 42 [2024-11-13 15:44:36,314 INFO L226 Difference]: Without dead ends: 36 [2024-11-13 15:44:36,314 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-13 15:44:36,315 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:44:36,316 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 27 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 15:44:36,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-13 15:44:36,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 26. [2024-11-13 15:44:36,325 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) [2024-11-13 15:44:36,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2024-11-13 15:44:36,326 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 13 [2024-11-13 15:44:36,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:44:36,326 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2024-11-13 15:44:36,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:44:36,327 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2024-11-13 15:44:36,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-13 15:44:36,327 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:44:36,327 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:44:36,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-13 15:44:36,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:44:36,529 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:44:36,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:44:36,529 INFO L85 PathProgramCache]: Analyzing trace with hash 442863232, now seen corresponding path program 2 times [2024-11-13 15:44:36,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:44:36,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388443545] [2024-11-13 15:44:36,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:44:36,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:44:36,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:44:36,747 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:44:36,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:44:36,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388443545] [2024-11-13 15:44:36,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388443545] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:44:36,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105083333] [2024-11-13 15:44:36,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:44:36,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:44:36,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:44:36,750 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:44:36,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 15:44:36,802 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:44:36,802 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:44:36,803 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 15:44:36,805 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:44:36,867 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:44:36,867 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:44:36,993 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:44:36,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105083333] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:44:36,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:44:36,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-11-13 15:44:36,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332319516] [2024-11-13 15:44:36,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:44:36,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-13 15:44:36,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:44:36,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-13 15:44:36,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2024-11-13 15:44:36,995 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:44:37,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:44:37,133 INFO L93 Difference]: Finished difference Result 83 states and 99 transitions. [2024-11-13 15:44:37,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 15:44:37,134 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 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 19 [2024-11-13 15:44:37,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:44:37,136 INFO L225 Difference]: With dead ends: 83 [2024-11-13 15:44:37,136 INFO L226 Difference]: Without dead ends: 74 [2024-11-13 15:44:37,136 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2024-11-13 15:44:37,137 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 39 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:44:37,138 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 39 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 15:44:37,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-13 15:44:37,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 47. [2024-11-13 15:44:37,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:44:37,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2024-11-13 15:44:37,145 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 19 [2024-11-13 15:44:37,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:44:37,146 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2024-11-13 15:44:37,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:44:37,146 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2024-11-13 15:44:37,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-13 15:44:37,147 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:44:37,147 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:44:37,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-13 15:44:37,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:44:37,351 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:44:37,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:44:37,352 INFO L85 PathProgramCache]: Analyzing trace with hash 786629986, now seen corresponding path program 3 times [2024-11-13 15:44:37,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:44:37,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725104550] [2024-11-13 15:44:37,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:44:37,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:44:37,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:44:37,771 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:44:37,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:44:37,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725104550] [2024-11-13 15:44:37,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725104550] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:44:37,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981681597] [2024-11-13 15:44:37,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 15:44:37,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:44:37,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:44:37,773 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:44:37,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 15:44:37,851 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-13 15:44:37,851 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:44:37,853 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-13 15:44:37,856 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:44:37,973 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:44:37,973 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:44:38,334 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:44:38,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981681597] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:44:38,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:44:38,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2024-11-13 15:44:38,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501197412] [2024-11-13 15:44:38,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:44:38,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-13 15:44:38,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:44:38,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-13 15:44:38,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2024-11-13 15:44:38,337 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:44:38,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:44:38,708 INFO L93 Difference]: Finished difference Result 197 states and 231 transitions. [2024-11-13 15:44:38,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-13 15:44:38,709 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 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 31 [2024-11-13 15:44:38,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:44:38,713 INFO L225 Difference]: With dead ends: 197 [2024-11-13 15:44:38,713 INFO L226 Difference]: Without dead ends: 182 [2024-11-13 15:44:38,714 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2024-11-13 15:44:38,715 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 179 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 15:44:38,715 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 68 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 15:44:38,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-11-13 15:44:38,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 89. [2024-11-13 15:44:38,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.1477272727272727) internal successors, (101), 88 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) [2024-11-13 15:44:38,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2024-11-13 15:44:38,731 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 31 [2024-11-13 15:44:38,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:44:38,731 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2024-11-13 15:44:38,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:44:38,732 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2024-11-13 15:44:38,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-13 15:44:38,733 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:44:38,733 INFO L215 NwaCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:44:38,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-13 15:44:38,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:44:38,938 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:44:38,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:44:38,938 INFO L85 PathProgramCache]: Analyzing trace with hash 137013798, now seen corresponding path program 4 times [2024-11-13 15:44:38,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:44:38,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712366175] [2024-11-13 15:44:38,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:44:38,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:44:38,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:44:39,778 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:44:39,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:44:39,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712366175] [2024-11-13 15:44:39,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712366175] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:44:39,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74636646] [2024-11-13 15:44:39,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 15:44:39,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:44:39,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:44:39,783 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:44:39,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 15:44:39,886 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 15:44:39,886 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:44:39,888 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-13 15:44:39,894 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:44:40,055 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:44:40,055 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:44:41,188 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:44:41,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74636646] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:44:41,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:44:41,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2024-11-13 15:44:41,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894277326] [2024-11-13 15:44:41,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:44:41,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-13 15:44:41,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:44:41,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-13 15:44:41,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1181, Invalid=1369, Unknown=0, NotChecked=0, Total=2550 [2024-11-13 15:44:41,194 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand has 51 states, 51 states have (on average 2.235294117647059) internal successors, (114), 51 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:44:41,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:44:41,939 INFO L93 Difference]: Finished difference Result 533 states and 603 transitions. [2024-11-13 15:44:41,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-13 15:44:41,939 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.235294117647059) internal successors, (114), 51 states have internal predecessors, (114), 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 55 [2024-11-13 15:44:41,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:44:41,942 INFO L225 Difference]: With dead ends: 533 [2024-11-13 15:44:41,942 INFO L226 Difference]: Without dead ends: 506 [2024-11-13 15:44:41,944 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1181, Invalid=1369, Unknown=0, NotChecked=0, Total=2550 [2024-11-13 15:44:41,945 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 382 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 15:44:41,945 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 128 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 15:44:41,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2024-11-13 15:44:41,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 173. [2024-11-13 15:44:41,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.1453488372093024) internal successors, (197), 172 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:44:41,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 197 transitions. [2024-11-13 15:44:41,987 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 197 transitions. Word has length 55 [2024-11-13 15:44:41,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:44:41,987 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 197 transitions. [2024-11-13 15:44:41,988 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.235294117647059) internal successors, (114), 51 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:44:41,989 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 197 transitions. [2024-11-13 15:44:41,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-13 15:44:41,994 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:44:41,994 INFO L215 NwaCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:44:42,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 15:44:42,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:44:42,195 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:44:42,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:44:42,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1106587730, now seen corresponding path program 5 times [2024-11-13 15:44:42,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:44:42,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775268289] [2024-11-13 15:44:42,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:44:42,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:44:42,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:44:44,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:44:44,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:44:44,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775268289] [2024-11-13 15:44:44,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775268289] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:44:44,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059012449] [2024-11-13 15:44:44,559 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 15:44:44,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:44:44,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:44:44,561 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:44:44,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 15:44:44,751 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2024-11-13 15:44:44,751 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:44:44,755 INFO L255 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-13 15:44:44,759 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:44:45,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:44:45,035 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:44:48,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:44:48,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059012449] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:44:48,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:44:48,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 99 [2024-11-13 15:44:48,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879086138] [2024-11-13 15:44:48,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:44:48,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2024-11-13 15:44:48,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:44:48,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2024-11-13 15:44:48,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4661, Invalid=5041, Unknown=0, NotChecked=0, Total=9702 [2024-11-13 15:44:48,406 INFO L87 Difference]: Start difference. First operand 173 states and 197 transitions. Second operand has 99 states, 99 states have (on average 2.121212121212121) internal successors, (210), 99 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:44:51,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:44:51,197 INFO L93 Difference]: Finished difference Result 1637 states and 1779 transitions. [2024-11-13 15:44:51,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2024-11-13 15:44:51,197 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.121212121212121) internal successors, (210), 99 states have internal predecessors, (210), 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 103 [2024-11-13 15:44:51,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:44:51,203 INFO L225 Difference]: With dead ends: 1637 [2024-11-13 15:44:51,204 INFO L226 Difference]: Without dead ends: 1586 [2024-11-13 15:44:51,206 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4661, Invalid=5041, Unknown=0, NotChecked=0, Total=9702 [2024-11-13 15:44:51,207 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 1177 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 563 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1177 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 563 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-13 15:44:51,208 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1177 Valid, 216 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [563 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-13 15:44:51,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2024-11-13 15:44:51,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 341. [2024-11-13 15:44:51,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.1441176470588235) internal successors, (389), 340 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:44:51,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 389 transitions. [2024-11-13 15:44:51,288 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 389 transitions. Word has length 103 [2024-11-13 15:44:51,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:44:51,293 INFO L471 AbstractCegarLoop]: Abstraction has 341 states and 389 transitions. [2024-11-13 15:44:51,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.121212121212121) internal successors, (210), 99 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:44:51,293 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 389 transitions. [2024-11-13 15:44:51,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2024-11-13 15:44:51,296 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:44:51,296 INFO L215 NwaCegarLoop]: trace histogram [95, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:44:51,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 15:44:51,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:44:51,501 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:44:51,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:44:51,502 INFO L85 PathProgramCache]: Analyzing trace with hash -503412034, now seen corresponding path program 6 times [2024-11-13 15:44:51,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:44:51,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237145366] [2024-11-13 15:44:51,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:44:51,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:44:51,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:44:58,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:44:58,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:44:58,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237145366] [2024-11-13 15:44:58,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237145366] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:44:58,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729462303] [2024-11-13 15:44:58,302 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 15:44:58,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:44:58,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:44:58,305 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:44:58,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 15:44:58,625 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2024-11-13 15:44:58,625 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:44:58,630 INFO L255 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-11-13 15:44:58,639 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:44:59,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:44:59,015 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:45:10,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:45:10,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729462303] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:45:10,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:45:10,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98, 98] total 195 [2024-11-13 15:45:10,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334096503] [2024-11-13 15:45:10,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:45:10,277 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 195 states [2024-11-13 15:45:10,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:45:10,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2024-11-13 15:45:10,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18533, Invalid=19297, Unknown=0, NotChecked=0, Total=37830 [2024-11-13 15:45:10,288 INFO L87 Difference]: Start difference. First operand 341 states and 389 transitions. Second operand has 195 states, 195 states have (on average 2.0615384615384613) internal successors, (402), 195 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:45:36,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:45:36,789 INFO L93 Difference]: Finished difference Result 5573 states and 5859 transitions. [2024-11-13 15:45:36,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2024-11-13 15:45:36,790 INFO L78 Accepts]: Start accepts. Automaton has has 195 states, 195 states have (on average 2.0615384615384613) internal successors, (402), 195 states have internal predecessors, (402), 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 199 [2024-11-13 15:45:36,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:45:36,812 INFO L225 Difference]: With dead ends: 5573 [2024-11-13 15:45:36,812 INFO L226 Difference]: Without dead ends: 5474 [2024-11-13 15:45:36,818 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=18533, Invalid=19297, Unknown=0, NotChecked=0, Total=37830 [2024-11-13 15:45:36,819 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 2487 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 1284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2487 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 2072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1284 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-13 15:45:36,819 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2487 Valid, 404 Invalid, 2072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1284 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-13 15:45:36,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5474 states. [2024-11-13 15:45:37,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5474 to 677. [2024-11-13 15:45:37,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 1.143491124260355) internal successors, (773), 676 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:45:37,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 773 transitions. [2024-11-13 15:45:37,070 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 773 transitions. Word has length 199 [2024-11-13 15:45:37,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:45:37,072 INFO L471 AbstractCegarLoop]: Abstraction has 677 states and 773 transitions. [2024-11-13 15:45:37,073 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 195 states, 195 states have (on average 2.0615384615384613) internal successors, (402), 195 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:45:37,073 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 773 transitions. [2024-11-13 15:45:37,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2024-11-13 15:45:37,085 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:45:37,085 INFO L215 NwaCegarLoop]: trace histogram [191, 190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:45:37,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-13 15:45:37,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:45:37,286 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:45:37,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:45:37,286 INFO L85 PathProgramCache]: Analyzing trace with hash 36946142, now seen corresponding path program 7 times [2024-11-13 15:45:37,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:45:37,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818901284] [2024-11-13 15:45:37,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:45:37,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:45:37,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:46:00,386 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 0 proven. 36290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:46:00,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:46:00,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818901284] [2024-11-13 15:46:00,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818901284] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:46:00,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217040023] [2024-11-13 15:46:00,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 15:46:00,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:46:00,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:46:00,389 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:46:00,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 15:46:00,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:46:00,703 INFO L255 TraceCheckSpWp]: Trace formula consists of 1557 conjuncts, 192 conjuncts are in the unsatisfiable core [2024-11-13 15:46:00,713 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:46:31,257 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 36290 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:46:31,257 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:46:31,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217040023] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:46:31,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 15:46:31,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [193] imperfect sequences [194] total 385 [2024-11-13 15:46:31,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156917487] [2024-11-13 15:46:31,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:46:31,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2024-11-13 15:46:31,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:46:31,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2024-11-13 15:46:31,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37057, Invalid=110783, Unknown=0, NotChecked=0, Total=147840 [2024-11-13 15:46:31,274 INFO L87 Difference]: Start difference. First operand 677 states and 773 transitions. Second operand has 193 states, 193 states have (on average 2.0259067357512954) internal successors, (391), 193 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:46:46,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:46:46,469 INFO L93 Difference]: Finished difference Result 27945 states and 28135 transitions. [2024-11-13 15:46:46,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2024-11-13 15:46:46,470 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 2.0259067357512954) internal successors, (391), 193 states have internal predecessors, (391), 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 391 [2024-11-13 15:46:46,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:46:46,481 INFO L225 Difference]: With dead ends: 27945 [2024-11-13 15:46:46,482 INFO L226 Difference]: Without dead ends: 1188 [2024-11-13 15:46:46,510 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 383 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36480 ImplicationChecksByTransitivity, 45.3s TimeCoverageRelationStatistics Valid=37057, Invalid=110783, Unknown=0, NotChecked=0, Total=147840 [2024-11-13 15:46:46,511 INFO L432 NwaCegarLoop]: 201 mSDtfsCounter, 613 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 15:46:46,511 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [613 Valid, 1145 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 15:46:46,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2024-11-13 15:46:46,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 1184. [2024-11-13 15:46:46,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 1.007607776838546) internal successors, (1192), 1183 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:46:46,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1192 transitions. [2024-11-13 15:46:46,769 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1192 transitions. Word has length 391 [2024-11-13 15:46:46,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:46:46,769 INFO L471 AbstractCegarLoop]: Abstraction has 1184 states and 1192 transitions. [2024-11-13 15:46:46,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 2.0259067357512954) internal successors, (391), 193 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:46:46,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1192 transitions. [2024-11-13 15:46:46,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2024-11-13 15:46:46,781 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:46:46,781 INFO L215 NwaCegarLoop]: trace histogram [100, 99, 92, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:46:46,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 15:46:46,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:46:46,982 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:46:46,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:46:46,982 INFO L85 PathProgramCache]: Analyzing trace with hash 609374092, now seen corresponding path program 1 times [2024-11-13 15:46:46,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:46:46,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708489933] [2024-11-13 15:46:46,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:46:46,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:46:47,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:47:09,296 INFO L134 CoverageAnalysis]: Checked inductivity of 18272 backedges. 0 proven. 18272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:47:09,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:47:09,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708489933] [2024-11-13 15:47:09,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708489933] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:47:09,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882572704] [2024-11-13 15:47:09,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:47:09,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:47:09,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:47:09,299 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:47:09,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 15:47:09,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:47:09,622 INFO L255 TraceCheckSpWp]: Trace formula consists of 1375 conjuncts, 194 conjuncts are in the unsatisfiable core [2024-11-13 15:47:09,633 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:47:10,336 INFO L134 CoverageAnalysis]: Checked inductivity of 18272 backedges. 0 proven. 18272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:47:10,337 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:47:27,315 INFO L134 CoverageAnalysis]: Checked inductivity of 18272 backedges. 0 proven. 18272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:47:27,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882572704] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:47:27,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:47:27,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [194, 194, 194] total 205 [2024-11-13 15:47:27,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564426222] [2024-11-13 15:47:27,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:47:27,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 205 states [2024-11-13 15:47:27,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:47:27,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 205 interpolants. [2024-11-13 15:47:27,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20508, Invalid=21312, Unknown=0, NotChecked=0, Total=41820 [2024-11-13 15:47:27,326 INFO L87 Difference]: Start difference. First operand 1184 states and 1192 transitions. Second operand has 205 states, 205 states have (on average 2.131707317073171) internal successors, (437), 205 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:47:43,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:47:43,122 INFO L93 Difference]: Finished difference Result 2327 states and 2462 transitions. [2024-11-13 15:47:43,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2024-11-13 15:47:43,123 INFO L78 Accepts]: Start accepts. Automaton has has 205 states, 205 states have (on average 2.131707317073171) internal successors, (437), 205 states have internal predecessors, (437), 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 391 [2024-11-13 15:47:43,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:47:43,130 INFO L225 Difference]: With dead ends: 2327 [2024-11-13 15:47:43,130 INFO L226 Difference]: Without dead ends: 0 [2024-11-13 15:47:43,134 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 974 GetRequests, 588 SyntacticMatches, 183 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19452 ImplicationChecksByTransitivity, 31.6s TimeCoverageRelationStatistics Valid=20508, Invalid=21312, Unknown=0, NotChecked=0, Total=41820 [2024-11-13 15:47:43,135 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 930 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 1048 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1048 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:47:43,135 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [930 Valid, 336 Invalid, 1531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1048 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-13 15:47:43,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-13 15:47:43,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-13 15:47:43,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:47:43,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-13 15:47:43,143 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 391 [2024-11-13 15:47:43,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:47:43,144 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-13 15:47:43,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 205 states, 205 states have (on average 2.131707317073171) internal successors, (437), 205 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:47:43,145 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-13 15:47:43,145 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-13 15:47:43,148 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-13 15:47:43,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-13 15:47:43,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bba1f36-68ef-4868-9b56-4be6a028fc3f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:47:43,356 INFO L407 BasicCegarLoop]: Path program histogram: [7, 1, 1, 1] [2024-11-13 15:47:43,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.