./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/sum20-2.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_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/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_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/sum20-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/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_82f91668-b3ef-4b53-8545-d8bceba85daf/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 7c2f5d73c406c3ffc9c27d7cd89dbe0ce5d7ec9b20c32fdf36fe2abec0cffd86 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 14:45:37,421 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 14:45:37,505 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-13 14:45:37,512 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 14:45:37,512 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 14:45:37,536 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 14:45:37,536 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 14:45:37,537 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 14:45:37,537 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 14:45:37,537 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 14:45:37,537 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 14:45:37,537 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 14:45:37,537 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 14:45:37,538 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 14:45:37,538 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 14:45:37,538 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 14:45:37,538 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 14:45:37,538 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 14:45:37,538 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 14:45:37,538 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 14:45:37,538 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 14:45:37,538 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 14:45:37,539 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 14:45:37,539 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 14:45:37,539 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 14:45:37,539 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 14:45:37,539 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 14:45:37,539 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 14:45:37,539 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 14:45:37,539 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 14:45:37,539 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 14:45:37,540 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 14:45:37,540 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 14:45:37,540 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 14:45:37,540 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 14:45:37,540 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 14:45:37,540 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 14:45:37,540 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 14:45:37,540 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 14:45:37,540 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 14:45:37,540 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 14:45:37,541 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 14:45:37,541 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_82f91668-b3ef-4b53-8545-d8bceba85daf/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 -> 7c2f5d73c406c3ffc9c27d7cd89dbe0ce5d7ec9b20c32fdf36fe2abec0cffd86 [2024-11-13 14:45:37,825 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 14:45:37,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 14:45:37,836 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 14:45:37,837 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 14:45:37,837 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 14:45:37,838 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/reducercommutativity/sum20-2.i Unable to find full path for "g++" [2024-11-13 14:45:39,613 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 14:45:39,891 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 14:45:39,892 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/sv-benchmarks/c/reducercommutativity/sum20-2.i [2024-11-13 14:45:39,919 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/data/2bd5c8299/a1308212a45a49b6a0e4c4d5918ac9f2/FLAG70be406c8 [2024-11-13 14:45:39,942 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/data/2bd5c8299/a1308212a45a49b6a0e4c4d5918ac9f2 [2024-11-13 14:45:39,946 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 14:45:39,948 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 14:45:39,950 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 14:45:39,950 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 14:45:39,954 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 14:45:39,955 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:45:39" (1/1) ... [2024-11-13 14:45:39,956 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1088ae3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:45:39, skipping insertion in model container [2024-11-13 14:45:39,958 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:45:39" (1/1) ... [2024-11-13 14:45:39,976 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 14:45:40,164 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_82f91668-b3ef-4b53-8545-d8bceba85daf/sv-benchmarks/c/reducercommutativity/sum20-2.i[1277,1290] [2024-11-13 14:45:40,168 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 14:45:40,177 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 14:45:40,201 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_82f91668-b3ef-4b53-8545-d8bceba85daf/sv-benchmarks/c/reducercommutativity/sum20-2.i[1277,1290] [2024-11-13 14:45:40,206 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 14:45:40,225 INFO L204 MainTranslator]: Completed translation [2024-11-13 14:45:40,225 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:45:40 WrapperNode [2024-11-13 14:45:40,226 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 14:45:40,227 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 14:45:40,227 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 14:45:40,227 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 14:45:40,234 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:45:40" (1/1) ... [2024-11-13 14:45:40,244 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:45:40" (1/1) ... [2024-11-13 14:45:40,268 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2024-11-13 14:45:40,268 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 14:45:40,269 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 14:45:40,270 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 14:45:40,270 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 14:45:40,279 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:45:40" (1/1) ... [2024-11-13 14:45:40,280 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:45:40" (1/1) ... [2024-11-13 14:45:40,283 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:45:40" (1/1) ... [2024-11-13 14:45:40,297 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 5 writes are split as follows [0, 5]. [2024-11-13 14:45:40,301 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:45:40" (1/1) ... [2024-11-13 14:45:40,301 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:45:40" (1/1) ... [2024-11-13 14:45:40,310 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:45:40" (1/1) ... [2024-11-13 14:45:40,315 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:45:40" (1/1) ... [2024-11-13 14:45:40,318 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:45:40" (1/1) ... [2024-11-13 14:45:40,319 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:45:40" (1/1) ... [2024-11-13 14:45:40,320 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 14:45:40,324 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 14:45:40,324 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 14:45:40,325 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 14:45:40,326 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:45:40" (1/1) ... [2024-11-13 14:45:40,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 14:45:40,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:45:40,363 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 14:45:40,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 14:45:40,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 14:45:40,396 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2024-11-13 14:45:40,396 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2024-11-13 14:45:40,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 14:45:40,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-13 14:45:40,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-13 14:45:40,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 14:45:40,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-13 14:45:40,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 14:45:40,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 14:45:40,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 14:45:40,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-13 14:45:40,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-13 14:45:40,485 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 14:45:40,487 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 14:45:40,633 INFO L? ?]: Removed 14 outVars from TransFormulas that were not future-live. [2024-11-13 14:45:40,633 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 14:45:40,641 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 14:45:40,642 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-13 14:45:40,642 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:45:40 BoogieIcfgContainer [2024-11-13 14:45:40,642 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 14:45:40,645 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 14:45:40,645 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 14:45:40,649 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 14:45:40,650 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:45:39" (1/3) ... [2024-11-13 14:45:40,650 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c6eef7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:45:40, skipping insertion in model container [2024-11-13 14:45:40,650 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:45:40" (2/3) ... [2024-11-13 14:45:40,651 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c6eef7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:45:40, skipping insertion in model container [2024-11-13 14:45:40,651 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:45:40" (3/3) ... [2024-11-13 14:45:40,653 INFO L112 eAbstractionObserver]: Analyzing ICFG sum20-2.i [2024-11-13 14:45:40,669 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 14:45:40,671 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG sum20-2.i that has 2 procedures, 24 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-13 14:45:40,738 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 14:45:40,753 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;@66c37962, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 14:45:40,753 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-13 14:45:40,758 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 14:45:40,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-13 14:45:40,764 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:45:40,765 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:45:40,765 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:45:40,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:45:40,769 INFO L85 PathProgramCache]: Analyzing trace with hash -101677610, now seen corresponding path program 1 times [2024-11-13 14:45:40,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:45:40,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96864535] [2024-11-13 14:45:40,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:45:40,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:45:40,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:41,070 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-13 14:45:41,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:41,118 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 14:45:41,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:41,135 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 14:45:41,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:41,151 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 14:45:41,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:45:41,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96864535] [2024-11-13 14:45:41,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96864535] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:45:41,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725880087] [2024-11-13 14:45:41,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:45:41,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:45:41,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:45:41,155 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:45:41,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 14:45:41,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:41,259 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-13 14:45:41,264 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:45:41,294 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 14:45:41,294 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:45:41,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725880087] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:45:41,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 14:45:41,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-13 14:45:41,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709768783] [2024-11-13 14:45:41,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:45:41,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 14:45:41,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:45:41,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 14:45:41,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:45:41,325 INFO L87 Difference]: Start difference. First operand has 24 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 14:45:41,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:45:41,360 INFO L93 Difference]: Finished difference Result 46 states and 65 transitions. [2024-11-13 14:45:41,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 14:45:41,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2024-11-13 14:45:41,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:45:41,392 INFO L225 Difference]: With dead ends: 46 [2024-11-13 14:45:41,394 INFO L226 Difference]: Without dead ends: 21 [2024-11-13 14:45:41,398 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:45:41,403 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:45:41,405 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:45:41,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-13 14:45:41,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-13 14:45:41,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 14:45:41,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2024-11-13 14:45:41,445 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 29 [2024-11-13 14:45:41,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:45:41,446 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2024-11-13 14:45:41,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 14:45:41,446 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2024-11-13 14:45:41,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-13 14:45:41,448 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:45:41,448 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:45:41,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-13 14:45:41,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-13 14:45:41,652 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:45:41,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:45:41,653 INFO L85 PathProgramCache]: Analyzing trace with hash -413882766, now seen corresponding path program 1 times [2024-11-13 14:45:41,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:45:41,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507051709] [2024-11-13 14:45:41,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:45:41,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:45:41,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:41,811 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-13 14:45:41,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:41,821 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-13 14:45:41,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:41,840 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-11-13 14:45:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:41,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 14:45:41,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:45:41,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507051709] [2024-11-13 14:45:41,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507051709] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:45:41,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994280637] [2024-11-13 14:45:41,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:45:41,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:45:41,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:45:41,867 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:45:41,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 14:45:41,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:41,981 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-13 14:45:41,983 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:45:42,002 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 14:45:42,002 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:45:42,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994280637] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:45:42,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 14:45:42,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-13 14:45:42,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902244644] [2024-11-13 14:45:42,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:45:42,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 14:45:42,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:45:42,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 14:45:42,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:45:42,005 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 14:45:42,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:45:42,021 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2024-11-13 14:45:42,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 14:45:42,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2024-11-13 14:45:42,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:45:42,025 INFO L225 Difference]: With dead ends: 37 [2024-11-13 14:45:42,025 INFO L226 Difference]: Without dead ends: 22 [2024-11-13 14:45:42,026 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:45:42,026 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:45:42,027 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:45:42,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-13 14:45:42,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-13 14:45:42,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 14:45:42,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2024-11-13 14:45:42,037 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 30 [2024-11-13 14:45:42,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:45:42,037 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2024-11-13 14:45:42,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 14:45:42,037 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2024-11-13 14:45:42,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-13 14:45:42,038 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:45:42,038 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:45:42,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-13 14:45:42,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:45:42,240 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:45:42,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:45:42,240 INFO L85 PathProgramCache]: Analyzing trace with hash -500376823, now seen corresponding path program 1 times [2024-11-13 14:45:42,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:45:42,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795661175] [2024-11-13 14:45:42,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:45:42,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:45:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:42,391 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-13 14:45:42,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:42,454 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 14:45:42,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:42,469 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-13 14:45:42,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:42,498 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 14:45:42,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:45:42,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795661175] [2024-11-13 14:45:42,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795661175] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:45:42,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055039098] [2024-11-13 14:45:42,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:45:42,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:45:42,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:45:42,501 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:45:42,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 14:45:42,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:42,623 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-13 14:45:42,624 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:45:42,649 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 14:45:42,649 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:45:42,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055039098] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:45:42,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 14:45:42,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-13 14:45:42,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820259155] [2024-11-13 14:45:42,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:45:42,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 14:45:42,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:45:42,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 14:45:42,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-13 14:45:42,651 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 14:45:42,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:45:42,669 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2024-11-13 14:45:42,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 14:45:42,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2024-11-13 14:45:42,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:45:42,672 INFO L225 Difference]: With dead ends: 35 [2024-11-13 14:45:42,672 INFO L226 Difference]: Without dead ends: 23 [2024-11-13 14:45:42,672 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-13 14:45:42,673 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:45:42,673 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:45:42,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-13 14:45:42,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-11-13 14:45:42,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 14:45:42,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2024-11-13 14:45:42,679 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 33 [2024-11-13 14:45:42,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:45:42,682 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2024-11-13 14:45:42,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 14:45:42,682 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2024-11-13 14:45:42,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-13 14:45:42,684 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:45:42,685 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:45:42,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-13 14:45:42,889 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:45:42,889 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:45:42,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:45:42,890 INFO L85 PathProgramCache]: Analyzing trace with hash -63425191, now seen corresponding path program 1 times [2024-11-13 14:45:42,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:45:42,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288388864] [2024-11-13 14:45:42,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:45:42,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:45:42,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:42,972 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-13 14:45:42,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:42,999 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 14:45:43,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:43,007 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 14:45:43,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:43,025 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 14:45:43,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:45:43,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288388864] [2024-11-13 14:45:43,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288388864] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:45:43,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660718376] [2024-11-13 14:45:43,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:45:43,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:45:43,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:45:43,028 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:45:43,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 14:45:43,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:43,124 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-13 14:45:43,126 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:45:43,156 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-13 14:45:43,157 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:45:43,205 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-13 14:45:43,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660718376] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:45:43,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:45:43,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2024-11-13 14:45:43,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577987644] [2024-11-13 14:45:43,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:45:43,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 14:45:43,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:45:43,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 14:45:43,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-13 14:45:43,207 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-13 14:45:43,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:45:43,234 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2024-11-13 14:45:43,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 14:45:43,234 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 34 [2024-11-13 14:45:43,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:45:43,235 INFO L225 Difference]: With dead ends: 46 [2024-11-13 14:45:43,235 INFO L226 Difference]: Without dead ends: 27 [2024-11-13 14:45:43,235 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-13 14:45:43,236 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:45:43,236 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:45:43,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-13 14:45:43,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-13 14:45:43,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 14:45:43,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2024-11-13 14:45:43,241 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 34 [2024-11-13 14:45:43,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:45:43,241 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2024-11-13 14:45:43,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-13 14:45:43,242 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2024-11-13 14:45:43,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-13 14:45:43,242 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:45:43,242 INFO L215 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:45:43,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 14:45:43,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:45:43,443 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:45:43,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:45:43,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1946599954, now seen corresponding path program 2 times [2024-11-13 14:45:43,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:45:43,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169437402] [2024-11-13 14:45:43,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:45:43,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:45:43,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:43,621 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-13 14:45:43,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:43,633 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-13 14:45:43,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:43,643 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-13 14:45:43,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:43,657 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-13 14:45:43,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:45:43,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169437402] [2024-11-13 14:45:43,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169437402] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:45:43,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194237597] [2024-11-13 14:45:43,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:45:43,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:45:43,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:45:43,663 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:45:43,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 14:45:43,797 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:45:43,797 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:45:43,799 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-13 14:45:43,801 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:45:43,876 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-13 14:45:43,876 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:45:44,000 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-13 14:45:44,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194237597] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:45:44,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:45:44,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2024-11-13 14:45:44,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251013439] [2024-11-13 14:45:44,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:45:44,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 14:45:44,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:45:44,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 14:45:44,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-11-13 14:45:44,004 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-13 14:45:44,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:45:44,051 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2024-11-13 14:45:44,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 14:45:44,052 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 40 [2024-11-13 14:45:44,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:45:44,053 INFO L225 Difference]: With dead ends: 54 [2024-11-13 14:45:44,053 INFO L226 Difference]: Without dead ends: 34 [2024-11-13 14:45:44,053 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-11-13 14:45:44,054 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:45:44,054 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 116 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:45:44,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-13 14:45:44,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-11-13 14:45:44,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 14:45:44,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2024-11-13 14:45:44,061 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 40 [2024-11-13 14:45:44,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:45:44,061 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2024-11-13 14:45:44,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-13 14:45:44,061 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2024-11-13 14:45:44,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-13 14:45:44,062 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:45:44,063 INFO L215 NwaCegarLoop]: trace histogram [10, 6, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:45:44,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 14:45:44,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:45:44,263 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:45:44,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:45:44,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1682673526, now seen corresponding path program 3 times [2024-11-13 14:45:44,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:45:44,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525728065] [2024-11-13 14:45:44,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:45:44,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:45:44,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:44,675 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-13 14:45:44,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:44,683 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-13 14:45:44,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:44,692 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-11-13 14:45:44,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:44,701 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-13 14:45:44,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:45:44,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525728065] [2024-11-13 14:45:44,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525728065] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:45:44,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598050064] [2024-11-13 14:45:44,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:45:44,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:45:44,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:45:44,705 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:45:44,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 14:45:44,817 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 14:45:44,817 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:45:44,818 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 14:45:44,821 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:45:44,878 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-11-13 14:45:44,878 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:45:44,967 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-11-13 14:45:44,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598050064] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:45:44,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:45:44,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2024-11-13 14:45:44,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691681067] [2024-11-13 14:45:44,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:45:44,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-13 14:45:44,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:45:44,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-13 14:45:44,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2024-11-13 14:45:44,972 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 14:45:45,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:45:45,018 INFO L93 Difference]: Finished difference Result 60 states and 75 transitions. [2024-11-13 14:45:45,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-13 14:45:45,019 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 47 [2024-11-13 14:45:45,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:45:45,019 INFO L225 Difference]: With dead ends: 60 [2024-11-13 14:45:45,019 INFO L226 Difference]: Without dead ends: 39 [2024-11-13 14:45:45,020 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2024-11-13 14:45:45,026 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:45:45,026 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 139 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:45:45,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-13 14:45:45,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-13 14:45:45,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 14:45:45,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2024-11-13 14:45:45,038 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 47 [2024-11-13 14:45:45,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:45:45,040 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2024-11-13 14:45:45,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 14:45:45,041 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2024-11-13 14:45:45,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-13 14:45:45,042 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:45:45,042 INFO L215 NwaCegarLoop]: trace histogram [18, 11, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:45:45,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-13 14:45:45,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-13 14:45:45,242 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:45:45,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:45:45,243 INFO L85 PathProgramCache]: Analyzing trace with hash 231979090, now seen corresponding path program 4 times [2024-11-13 14:45:45,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:45:45,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52187803] [2024-11-13 14:45:45,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:45:45,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:45:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:45,647 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-11-13 14:45:45,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:45,659 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-13 14:45:45,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:45,670 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-11-13 14:45:45,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:45,682 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2024-11-13 14:45:45,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:45:45,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52187803] [2024-11-13 14:45:45,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52187803] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:45:45,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446807323] [2024-11-13 14:45:45,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 14:45:45,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:45:45,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:45:45,685 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:45:45,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 14:45:45,848 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 14:45:45,848 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:45:45,849 INFO L255 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-13 14:45:45,852 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:45:45,894 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2024-11-13 14:45:45,894 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:45:46,157 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2024-11-13 14:45:46,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446807323] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:45:46,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:45:46,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 23 [2024-11-13 14:45:46,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394120779] [2024-11-13 14:45:46,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:45:46,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-13 14:45:46,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:45:46,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-13 14:45:46,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2024-11-13 14:45:46,160 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-13 14:45:46,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:45:46,195 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2024-11-13 14:45:46,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-13 14:45:46,196 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 60 [2024-11-13 14:45:46,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:45:46,196 INFO L225 Difference]: With dead ends: 73 [2024-11-13 14:45:46,197 INFO L226 Difference]: Without dead ends: 48 [2024-11-13 14:45:46,197 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 113 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2024-11-13 14:45:46,198 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:45:46,198 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:45:46,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-13 14:45:46,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-11-13 14:45:46,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 14:45:46,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2024-11-13 14:45:46,205 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 60 [2024-11-13 14:45:46,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:45:46,205 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2024-11-13 14:45:46,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-13 14:45:46,206 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2024-11-13 14:45:46,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-13 14:45:46,207 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:45:46,207 INFO L215 NwaCegarLoop]: trace histogram [20, 18, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:45:46,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 14:45:46,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:45:46,411 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:45:46,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:45:46,412 INFO L85 PathProgramCache]: Analyzing trace with hash -767454666, now seen corresponding path program 5 times [2024-11-13 14:45:46,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:45:46,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9530058] [2024-11-13 14:45:46,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:45:46,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:45:46,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:46,608 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 14:45:46,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:46,698 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-13 14:45:46,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:46,711 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-11-13 14:45:46,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:46,724 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2024-11-13 14:45:46,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:45:46,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9530058] [2024-11-13 14:45:46,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9530058] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:45:46,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438618694] [2024-11-13 14:45:46,732 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 14:45:46,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:45:46,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:45:46,734 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:45:46,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 14:45:47,501 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-11-13 14:45:47,502 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:45:47,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 14:45:47,507 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:45:47,556 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 106 proven. 3 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2024-11-13 14:45:47,556 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:45:47,624 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-11-13 14:45:47,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438618694] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:45:47,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:45:47,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 15 [2024-11-13 14:45:47,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450176843] [2024-11-13 14:45:47,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:45:47,626 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-13 14:45:47,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:45:47,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-13 14:45:47,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2024-11-13 14:45:47,627 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 14:45:47,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:45:47,671 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2024-11-13 14:45:47,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 14:45:47,671 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 69 [2024-11-13 14:45:47,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:45:47,672 INFO L225 Difference]: With dead ends: 76 [2024-11-13 14:45:47,672 INFO L226 Difference]: Without dead ends: 53 [2024-11-13 14:45:47,673 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2024-11-13 14:45:47,674 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:45:47,674 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 174 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:45:47,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-13 14:45:47,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-11-13 14:45:47,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 14:45:47,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2024-11-13 14:45:47,681 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 69 [2024-11-13 14:45:47,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:45:47,681 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2024-11-13 14:45:47,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 14:45:47,681 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2024-11-13 14:45:47,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-13 14:45:47,682 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:45:47,682 INFO L215 NwaCegarLoop]: trace histogram [21, 20, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:45:47,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 14:45:47,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:45:47,883 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:45:47,883 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:45:47,884 INFO L85 PathProgramCache]: Analyzing trace with hash -972501947, now seen corresponding path program 6 times [2024-11-13 14:45:47,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:45:47,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548326859] [2024-11-13 14:45:47,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:45:47,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:45:47,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:48,119 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 14:45:48,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:48,223 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-13 14:45:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:48,232 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-11-13 14:45:48,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:48,258 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2024-11-13 14:45:48,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:45:48,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548326859] [2024-11-13 14:45:48,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548326859] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:45:48,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166787058] [2024-11-13 14:45:48,258 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 14:45:48,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:45:48,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:45:48,261 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:45:48,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 14:45:48,919 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-11-13 14:45:48,919 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:45:48,923 INFO L255 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 14:45:48,925 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:45:48,956 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 134 proven. 28 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2024-11-13 14:45:48,956 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:45:49,119 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 134 proven. 28 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2024-11-13 14:45:49,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166787058] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:45:49,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:45:49,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2024-11-13 14:45:49,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275178879] [2024-11-13 14:45:49,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:45:49,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 14:45:49,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:45:49,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 14:45:49,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2024-11-13 14:45:49,122 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 14:45:49,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:45:49,152 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2024-11-13 14:45:49,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-13 14:45:49,152 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 76 [2024-11-13 14:45:49,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:45:49,153 INFO L225 Difference]: With dead ends: 90 [2024-11-13 14:45:49,153 INFO L226 Difference]: Without dead ends: 62 [2024-11-13 14:45:49,154 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2024-11-13 14:45:49,154 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:45:49,155 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 149 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:45:49,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-13 14:45:49,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-11-13 14:45:49,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 14:45:49,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2024-11-13 14:45:49,162 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 76 [2024-11-13 14:45:49,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:45:49,163 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2024-11-13 14:45:49,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 14:45:49,163 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2024-11-13 14:45:49,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-13 14:45:49,164 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:45:49,164 INFO L215 NwaCegarLoop]: trace histogram [48, 20, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:45:49,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-13 14:45:49,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:45:49,366 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:45:49,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:45:49,366 INFO L85 PathProgramCache]: Analyzing trace with hash -363509674, now seen corresponding path program 7 times [2024-11-13 14:45:49,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:45:49,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121764597] [2024-11-13 14:45:49,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:45:49,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:45:49,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:49,831 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 14:45:49,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:50,143 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-13 14:45:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:50,169 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-11-13 14:45:50,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:50,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 720 refuted. 0 times theorem prover too weak. 798 trivial. 0 not checked. [2024-11-13 14:45:50,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:45:50,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121764597] [2024-11-13 14:45:50,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121764597] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:45:50,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870425492] [2024-11-13 14:45:50,184 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 14:45:50,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:45:50,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:45:50,186 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:45:50,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 14:45:50,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:50,408 INFO L255 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-13 14:45:50,411 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:45:50,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 580 proven. 136 refuted. 0 times theorem prover too weak. 802 trivial. 0 not checked. [2024-11-13 14:45:50,462 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:45:50,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 720 refuted. 0 times theorem prover too weak. 798 trivial. 0 not checked. [2024-11-13 14:45:50,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870425492] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:45:50,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:45:50,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 22 [2024-11-13 14:45:50,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357805330] [2024-11-13 14:45:50,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:45:50,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-13 14:45:50,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:45:50,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-13 14:45:50,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2024-11-13 14:45:50,766 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-13 14:45:50,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:45:50,801 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2024-11-13 14:45:50,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-13 14:45:50,802 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 103 [2024-11-13 14:45:50,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:45:50,803 INFO L225 Difference]: With dead ends: 103 [2024-11-13 14:45:50,803 INFO L226 Difference]: Without dead ends: 66 [2024-11-13 14:45:50,803 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 195 SyntacticMatches, 14 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2024-11-13 14:45:50,804 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:45:50,804 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:45:50,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-13 14:45:50,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-11-13 14:45:50,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 61 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 14:45:50,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2024-11-13 14:45:50,816 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 103 [2024-11-13 14:45:50,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:45:50,816 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2024-11-13 14:45:50,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-13 14:45:50,816 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2024-11-13 14:45:50,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-11-13 14:45:50,818 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:45:50,818 INFO L215 NwaCegarLoop]: trace histogram [60, 20, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:45:50,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-13 14:45:51,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-13 14:45:51,022 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:45:51,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:45:51,023 INFO L85 PathProgramCache]: Analyzing trace with hash -43288170, now seen corresponding path program 8 times [2024-11-13 14:45:51,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:45:51,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604867427] [2024-11-13 14:45:51,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:45:51,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:45:51,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:51,309 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 14:45:51,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:51,321 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-11-13 14:45:51,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:51,333 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-11-13 14:45:51,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:51,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2196 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2175 trivial. 0 not checked. [2024-11-13 14:45:51,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:45:51,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604867427] [2024-11-13 14:45:51,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604867427] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:45:51,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313380023] [2024-11-13 14:45:51,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:45:51,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:45:51,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:45:51,351 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:45:51,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 14:45:51,588 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:45:51,588 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:45:51,592 INFO L255 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 14:45:51,595 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:45:51,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2196 backedges. 890 proven. 21 refuted. 0 times theorem prover too weak. 1285 trivial. 0 not checked. [2024-11-13 14:45:51,621 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:45:51,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2196 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2175 trivial. 0 not checked. [2024-11-13 14:45:51,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313380023] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:45:51,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:45:51,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-11-13 14:45:51,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333192675] [2024-11-13 14:45:51,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:45:51,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-13 14:45:51,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:45:51,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-13 14:45:51,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-11-13 14:45:51,749 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 14:45:51,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:45:51,781 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2024-11-13 14:45:51,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 14:45:51,782 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 115 [2024-11-13 14:45:51,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:45:51,783 INFO L225 Difference]: With dead ends: 105 [2024-11-13 14:45:51,784 INFO L226 Difference]: Without dead ends: 74 [2024-11-13 14:45:51,785 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-11-13 14:45:51,785 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:45:51,787 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:45:51,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-13 14:45:51,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2024-11-13 14:45:51,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 69 states have internal predecessors, (72), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 14:45:51,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2024-11-13 14:45:51,800 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 115 [2024-11-13 14:45:51,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:45:51,801 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2024-11-13 14:45:51,801 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 14:45:51,801 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2024-11-13 14:45:51,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-13 14:45:51,803 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:45:51,806 INFO L215 NwaCegarLoop]: trace histogram [60, 20, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:45:51,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-13 14:45:52,006 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:45:52,007 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:45:52,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:45:52,007 INFO L85 PathProgramCache]: Analyzing trace with hash -973273194, now seen corresponding path program 9 times [2024-11-13 14:45:52,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:45:52,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123717872] [2024-11-13 14:45:52,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:45:52,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:45:52,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:52,549 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 14:45:52,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:52,560 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-11-13 14:45:52,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:52,575 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-11-13 14:45:52,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:45:52,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 2175 trivial. 0 not checked. [2024-11-13 14:45:52,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:45:52,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123717872] [2024-11-13 14:45:52,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123717872] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:45:52,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991872511] [2024-11-13 14:45:52,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:45:52,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:45:52,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:45:52,592 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:45:52,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 14:45:53,265 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-13 14:45:53,266 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:45:53,271 INFO L255 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-13 14:45:53,274 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:45:53,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 890 proven. 105 refuted. 0 times theorem prover too weak. 1285 trivial. 0 not checked. [2024-11-13 14:45:53,321 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:45:53,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 2175 trivial. 0 not checked. [2024-11-13 14:45:53,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991872511] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:45:53,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:45:53,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 22 [2024-11-13 14:45:53,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239189505] [2024-11-13 14:45:53,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:45:53,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-13 14:45:53,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:45:53,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-13 14:45:53,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2024-11-13 14:45:53,603 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 14:45:53,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:45:53,650 INFO L93 Difference]: Finished difference Result 110 states and 119 transitions. [2024-11-13 14:45:53,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-13 14:45:53,651 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 123 [2024-11-13 14:45:53,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:45:53,652 INFO L225 Difference]: With dead ends: 110 [2024-11-13 14:45:53,652 INFO L226 Difference]: Without dead ends: 79 [2024-11-13 14:45:53,653 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 236 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2024-11-13 14:45:53,653 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:45:53,653 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 118 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:45:53,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-13 14:45:53,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2024-11-13 14:45:53,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 14:45:53,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2024-11-13 14:45:53,661 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 123 [2024-11-13 14:45:53,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:45:53,661 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2024-11-13 14:45:53,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 14:45:53,662 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2024-11-13 14:45:53,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-13 14:45:53,663 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:45:53,663 INFO L215 NwaCegarLoop]: trace histogram [60, 20, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:45:53,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-13 14:45:53,867 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82f91668-b3ef-4b53-8545-d8bceba85daf/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-13 14:45:53,867 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:45:53,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:45:53,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1620498994, now seen corresponding path program 10 times [2024-11-13 14:45:53,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:45:53,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831491363] [2024-11-13 14:45:53,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:45:53,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:45:59,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat