./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum_m4.c --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_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/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_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum_m4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/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_8f674795-12e6-40c6-b035-adb95fe437ca/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 9b7320b0b08ab747958954e3beeb769f7a9cf6ae7994b9d20ef1bd1e033aa0a7 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 16:19:11,775 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 16:19:11,859 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-13 16:19:11,864 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 16:19:11,865 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 16:19:11,888 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 16:19:11,889 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 16:19:11,889 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 16:19:11,890 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 16:19:11,890 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 16:19:11,890 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 16:19:11,890 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 16:19:11,891 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 16:19:11,891 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 16:19:11,891 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 16:19:11,891 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 16:19:11,891 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 16:19:11,892 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 16:19:11,892 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 16:19:11,892 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 16:19:11,892 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 16:19:11,892 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 16:19:11,892 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 16:19:11,893 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 16:19:11,893 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 16:19:11,893 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 16:19:11,893 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 16:19:11,893 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 16:19:11,893 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 16:19:11,894 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 16:19:11,894 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 16:19:11,894 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 16:19:11,894 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 16:19:11,894 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 16:19:11,894 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 16:19:11,894 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 16:19:11,894 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 16:19:11,894 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 16:19:11,895 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 16:19:11,895 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 16:19:11,895 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 16:19:11,895 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 16:19:11,895 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_8f674795-12e6-40c6-b035-adb95fe437ca/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 -> 9b7320b0b08ab747958954e3beeb769f7a9cf6ae7994b9d20ef1bd1e033aa0a7 [2024-11-13 16:19:12,251 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 16:19:12,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 16:19:12,265 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 16:19:12,266 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 16:19:12,266 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 16:19:12,267 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/array-crafted/zero_sum_m4.c Unable to find full path for "g++" [2024-11-13 16:19:14,155 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 16:19:14,403 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 16:19:14,407 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/sv-benchmarks/c/array-crafted/zero_sum_m4.c [2024-11-13 16:19:14,418 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/data/953cc5201/5735cbc2e21e454a8d1a9a37048d2276/FLAGde62b6981 [2024-11-13 16:19:14,442 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/data/953cc5201/5735cbc2e21e454a8d1a9a37048d2276 [2024-11-13 16:19:14,445 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 16:19:14,447 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 16:19:14,450 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 16:19:14,451 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 16:19:14,456 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 16:19:14,457 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 04:19:14" (1/1) ... [2024-11-13 16:19:14,458 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41538d03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:19:14, skipping insertion in model container [2024-11-13 16:19:14,461 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 04:19:14" (1/1) ... [2024-11-13 16:19:14,479 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 16:19:14,670 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_8f674795-12e6-40c6-b035-adb95fe437ca/sv-benchmarks/c/array-crafted/zero_sum_m4.c[402,415] [2024-11-13 16:19:14,708 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 16:19:14,726 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 16:19:14,738 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_8f674795-12e6-40c6-b035-adb95fe437ca/sv-benchmarks/c/array-crafted/zero_sum_m4.c[402,415] [2024-11-13 16:19:14,760 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 16:19:14,783 INFO L204 MainTranslator]: Completed translation [2024-11-13 16:19:14,784 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:19:14 WrapperNode [2024-11-13 16:19:14,784 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 16:19:14,785 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 16:19:14,786 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 16:19:14,786 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 16:19:14,794 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:19:14" (1/1) ... [2024-11-13 16:19:14,801 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:19:14" (1/1) ... [2024-11-13 16:19:14,837 INFO L138 Inliner]: procedures = 15, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 121 [2024-11-13 16:19:14,837 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 16:19:14,839 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 16:19:14,839 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 16:19:14,839 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 16:19:14,849 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:19:14" (1/1) ... [2024-11-13 16:19:14,849 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:19:14" (1/1) ... [2024-11-13 16:19:14,852 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:19:14" (1/1) ... [2024-11-13 16:19:14,875 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-13 16:19:14,876 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:19:14" (1/1) ... [2024-11-13 16:19:14,876 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:19:14" (1/1) ... [2024-11-13 16:19:14,888 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:19:14" (1/1) ... [2024-11-13 16:19:14,895 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:19:14" (1/1) ... [2024-11-13 16:19:14,902 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:19:14" (1/1) ... [2024-11-13 16:19:14,903 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:19:14" (1/1) ... [2024-11-13 16:19:14,905 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 16:19:14,910 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 16:19:14,910 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 16:19:14,910 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 16:19:14,911 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:19:14" (1/1) ... [2024-11-13 16:19:14,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 16:19:14,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:19:14,957 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 16:19:14,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 16:19:14,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 16:19:14,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 16:19:14,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-13 16:19:14,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-13 16:19:14,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 16:19:14,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-13 16:19:14,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 16:19:14,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 16:19:14,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 16:19:14,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-13 16:19:14,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-13 16:19:15,099 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 16:19:15,101 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 16:19:15,397 INFO L? ?]: Removed 15 outVars from TransFormulas that were not future-live. [2024-11-13 16:19:15,398 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 16:19:15,412 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 16:19:15,412 INFO L316 CfgBuilder]: Removed 9 assume(true) statements. [2024-11-13 16:19:15,412 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 04:19:15 BoogieIcfgContainer [2024-11-13 16:19:15,413 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 16:19:15,416 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 16:19:15,416 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 16:19:15,422 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 16:19:15,423 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 04:19:14" (1/3) ... [2024-11-13 16:19:15,423 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@681d71f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 04:19:15, skipping insertion in model container [2024-11-13 16:19:15,424 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:19:14" (2/3) ... [2024-11-13 16:19:15,424 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@681d71f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 04:19:15, skipping insertion in model container [2024-11-13 16:19:15,424 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 04:19:15" (3/3) ... [2024-11-13 16:19:15,425 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum_m4.c [2024-11-13 16:19:15,444 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 16:19:15,448 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG zero_sum_m4.c that has 1 procedures, 29 locations, 1 initial locations, 9 loop locations, and 1 error locations. [2024-11-13 16:19:15,520 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 16:19:15,540 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;@e17096e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 16:19:15,540 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-13 16:19:15,545 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:19:15,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-13 16:19:15,552 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:19:15,554 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:19:15,555 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:19:15,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:19:15,561 INFO L85 PathProgramCache]: Analyzing trace with hash -104815054, now seen corresponding path program 1 times [2024-11-13 16:19:15,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:19:15,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605413771] [2024-11-13 16:19:15,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:19:15,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:19:15,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:19:15,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:19:15,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:19:15,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605413771] [2024-11-13 16:19:15,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605413771] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:19:15,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:19:15,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 16:19:15,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281591797] [2024-11-13 16:19:15,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:19:15,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 16:19:15,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:19:15,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 16:19:15,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 16:19:15,943 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:19:16,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:19:16,024 INFO L93 Difference]: Finished difference Result 55 states and 92 transitions. [2024-11-13 16:19:16,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 16:19:16,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-11-13 16:19:16,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:19:16,035 INFO L225 Difference]: With dead ends: 55 [2024-11-13 16:19:16,036 INFO L226 Difference]: Without dead ends: 25 [2024-11-13 16:19:16,039 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 16:19:16,044 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 16:19:16,045 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 16:19:16,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-13 16:19:16,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-13 16:19:16,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:19:16,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2024-11-13 16:19:16,093 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 23 [2024-11-13 16:19:16,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:19:16,095 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2024-11-13 16:19:16,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:19:16,096 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2024-11-13 16:19:16,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-13 16:19:16,099 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:19:16,099 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:19:16,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 16:19:16,099 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:19:16,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:19:16,100 INFO L85 PathProgramCache]: Analyzing trace with hash -2141132349, now seen corresponding path program 1 times [2024-11-13 16:19:16,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:19:16,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949542880] [2024-11-13 16:19:16,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:19:16,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:19:16,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:19:16,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:19:16,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:19:16,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949542880] [2024-11-13 16:19:16,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949542880] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:19:16,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:19:16,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 16:19:16,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190827158] [2024-11-13 16:19:16,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:19:16,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 16:19:16,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:19:16,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 16:19:16,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 16:19:16,352 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:19:16,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:19:16,497 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2024-11-13 16:19:16,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 16:19:16,501 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-13 16:19:16,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:19:16,502 INFO L225 Difference]: With dead ends: 51 [2024-11-13 16:19:16,502 INFO L226 Difference]: Without dead ends: 33 [2024-11-13 16:19:16,502 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 16:19:16,503 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 34 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 16:19:16,504 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 17 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 16:19:16,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-13 16:19:16,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-13 16:19:16,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:19:16,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2024-11-13 16:19:16,522 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 24 [2024-11-13 16:19:16,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:19:16,522 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2024-11-13 16:19:16,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:19:16,522 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2024-11-13 16:19:16,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-13 16:19:16,523 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:19:16,523 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:19:16,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 16:19:16,524 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:19:16,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:19:16,526 INFO L85 PathProgramCache]: Analyzing trace with hash 927214147, now seen corresponding path program 1 times [2024-11-13 16:19:16,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:19:16,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487476313] [2024-11-13 16:19:16,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:19:16,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:19:16,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:19:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:19:16,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:19:16,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487476313] [2024-11-13 16:19:16,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487476313] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:19:16,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138063085] [2024-11-13 16:19:16,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:19:16,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:19:16,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:19:16,769 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:19:16,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 16:19:16,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:19:16,905 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 16:19:16,912 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:19:16,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:19:16,999 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:19:17,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:19:17,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138063085] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:19:17,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:19:17,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-13 16:19:17,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602323404] [2024-11-13 16:19:17,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:19:17,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 16:19:17,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:19:17,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 16:19:17,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-11-13 16:19:17,059 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:19:17,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:19:17,205 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2024-11-13 16:19:17,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 16:19:17,207 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-13 16:19:17,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:19:17,207 INFO L225 Difference]: With dead ends: 62 [2024-11-13 16:19:17,207 INFO L226 Difference]: Without dead ends: 34 [2024-11-13 16:19:17,208 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-11-13 16:19:17,209 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 16:19:17,209 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 71 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 16:19:17,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-13 16:19:17,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-11-13 16:19:17,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:19:17,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2024-11-13 16:19:17,222 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 32 [2024-11-13 16:19:17,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:19:17,222 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2024-11-13 16:19:17,222 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:19:17,224 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2024-11-13 16:19:17,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-13 16:19:17,225 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:19:17,225 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:19:17,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-13 16:19:17,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:19:17,426 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:19:17,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:19:17,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1259104218, now seen corresponding path program 2 times [2024-11-13 16:19:17,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:19:17,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636757146] [2024-11-13 16:19:17,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:19:17,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:19:17,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:19:17,651 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 16:19:17,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:19:17,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636757146] [2024-11-13 16:19:17,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636757146] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:19:17,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662268047] [2024-11-13 16:19:17,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:19:17,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:19:17,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:19:17,654 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:19:17,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 16:19:17,763 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:19:17,763 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:19:17,765 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 16:19:17,766 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:19:17,909 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 16:19:17,909 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:19:17,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 16:19:17,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662268047] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:19:17,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:19:17,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-11-13 16:19:17,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463364141] [2024-11-13 16:19:17,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:19:17,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 16:19:17,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:19:17,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 16:19:17,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-11-13 16:19:17,995 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:19:18,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:19:18,139 INFO L93 Difference]: Finished difference Result 67 states and 89 transitions. [2024-11-13 16:19:18,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 16:19:18,140 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-11-13 16:19:18,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:19:18,140 INFO L225 Difference]: With dead ends: 67 [2024-11-13 16:19:18,141 INFO L226 Difference]: Without dead ends: 42 [2024-11-13 16:19:18,141 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-11-13 16:19:18,142 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 16:19:18,142 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 17 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 16:19:18,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-13 16:19:18,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-11-13 16:19:18,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:19:18,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2024-11-13 16:19:18,156 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 33 [2024-11-13 16:19:18,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:19:18,158 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2024-11-13 16:19:18,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:19:18,158 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2024-11-13 16:19:18,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-13 16:19:18,159 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:19:18,159 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:19:18,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-13 16:19:18,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-13 16:19:18,360 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:19:18,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:19:18,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1623570266, now seen corresponding path program 3 times [2024-11-13 16:19:18,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:19:18,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382048778] [2024-11-13 16:19:18,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:19:18,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:19:18,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:19:23,063 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:19:23,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:19:23,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382048778] [2024-11-13 16:19:23,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382048778] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:19:23,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240349131] [2024-11-13 16:19:23,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 16:19:23,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:19:23,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:19:23,066 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:19:23,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 16:19:23,189 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 16:19:23,189 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:19:23,192 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-11-13 16:19:23,198 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:19:23,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 16:19:25,093 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:19:25,093 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:19:28,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-13 16:19:28,887 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:19:28,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 56 [2024-11-13 16:19:29,096 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:19:29,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240349131] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:19:29,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:19:29,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 27, 28] total 69 [2024-11-13 16:19:29,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281638217] [2024-11-13 16:19:29,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:19:29,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-11-13 16:19:29,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:19:29,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-11-13 16:19:29,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=4447, Unknown=0, NotChecked=0, Total=4692 [2024-11-13 16:19:29,101 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 69 states, 69 states have (on average 1.5942028985507246) internal successors, (110), 69 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:19:31,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:19:31,171 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2024-11-13 16:19:31,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-13 16:19:31,172 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.5942028985507246) internal successors, (110), 69 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-11-13 16:19:31,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:19:31,173 INFO L225 Difference]: With dead ends: 75 [2024-11-13 16:19:31,173 INFO L226 Difference]: Without dead ends: 71 [2024-11-13 16:19:31,179 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=265, Invalid=4847, Unknown=0, NotChecked=0, Total=5112 [2024-11-13 16:19:31,180 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 8 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 1967 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 1975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-13 16:19:31,180 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 234 Invalid, 1975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1967 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-13 16:19:31,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-13 16:19:31,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2024-11-13 16:19:31,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.2352941176470589) internal successors, (84), 68 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:19:31,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 84 transitions. [2024-11-13 16:19:31,199 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 84 transitions. Word has length 41 [2024-11-13 16:19:31,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:19:31,201 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 84 transitions. [2024-11-13 16:19:31,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.5942028985507246) internal successors, (110), 69 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:19:31,201 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 84 transitions. [2024-11-13 16:19:31,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-13 16:19:31,204 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:19:31,205 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:19:31,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 16:19:31,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:19:31,409 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:19:31,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:19:31,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1740418915, now seen corresponding path program 4 times [2024-11-13 16:19:31,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:19:31,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866747020] [2024-11-13 16:19:31,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:19:31,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:19:31,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:19:31,568 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-13 16:19:31,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:19:31,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866747020] [2024-11-13 16:19:31,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866747020] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:19:31,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957928955] [2024-11-13 16:19:31,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 16:19:31,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:19:31,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:19:31,570 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:19:31,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 16:19:31,649 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 16:19:31,650 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:19:31,651 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 16:19:31,653 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:19:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-13 16:19:31,769 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:19:31,853 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-13 16:19:31,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957928955] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:19:31,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:19:31,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-11-13 16:19:31,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643938787] [2024-11-13 16:19:31,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:19:31,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-13 16:19:31,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:19:31,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-13 16:19:31,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-11-13 16:19:31,855 INFO L87 Difference]: Start difference. First operand 69 states and 84 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:19:32,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:19:32,202 INFO L93 Difference]: Finished difference Result 144 states and 180 transitions. [2024-11-13 16:19:32,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 16:19:32,202 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2024-11-13 16:19:32,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:19:32,203 INFO L225 Difference]: With dead ends: 144 [2024-11-13 16:19:32,203 INFO L226 Difference]: Without dead ends: 79 [2024-11-13 16:19:32,204 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2024-11-13 16:19:32,205 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 16:19:32,205 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 75 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 16:19:32,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-13 16:19:32,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2024-11-13 16:19:32,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 73 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:19:32,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2024-11-13 16:19:32,216 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 42 [2024-11-13 16:19:32,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:19:32,216 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2024-11-13 16:19:32,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:19:32,216 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2024-11-13 16:19:32,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-13 16:19:32,217 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:19:32,217 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:19:32,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-13 16:19:32,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-13 16:19:32,418 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:19:32,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:19:32,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1183127110, now seen corresponding path program 5 times [2024-11-13 16:19:32,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:19:32,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078072503] [2024-11-13 16:19:32,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:19:32,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:19:32,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:19:32,576 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 16:19:32,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:19:32,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078072503] [2024-11-13 16:19:32,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078072503] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:19:32,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479514158] [2024-11-13 16:19:32,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 16:19:32,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:19:32,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:19:32,579 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:19:32,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 16:19:32,702 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-13 16:19:32,703 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:19:32,704 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 16:19:32,706 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:19:32,821 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 16:19:32,821 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:19:32,925 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 16:19:32,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479514158] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:19:32,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:19:32,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-13 16:19:32,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553532262] [2024-11-13 16:19:32,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:19:32,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 16:19:32,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:19:32,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 16:19:32,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2024-11-13 16:19:32,927 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:19:33,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:19:33,124 INFO L93 Difference]: Finished difference Result 79 states and 93 transitions. [2024-11-13 16:19:33,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 16:19:33,125 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2024-11-13 16:19:33,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:19:33,126 INFO L225 Difference]: With dead ends: 79 [2024-11-13 16:19:33,126 INFO L226 Difference]: Without dead ends: 51 [2024-11-13 16:19:33,126 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 75 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-11-13 16:19:33,127 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 10 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 16:19:33,127 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 64 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 16:19:33,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-13 16:19:33,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-13 16:19:33,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.18) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:19:33,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2024-11-13 16:19:33,135 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 43 [2024-11-13 16:19:33,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:19:33,135 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2024-11-13 16:19:33,135 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:19:33,135 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2024-11-13 16:19:33,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-13 16:19:33,136 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:19:33,136 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:19:33,158 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 16:19:33,336 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:19:33,337 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:19:33,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:19:33,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1926116387, now seen corresponding path program 6 times [2024-11-13 16:19:33,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:19:33,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816744253] [2024-11-13 16:19:33,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:19:33,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:19:33,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:19:38,775 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:19:38,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:19:38,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816744253] [2024-11-13 16:19:38,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816744253] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:19:38,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944718706] [2024-11-13 16:19:38,775 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 16:19:38,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:19:38,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:19:38,777 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:19:38,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 16:19:38,880 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-13 16:19:38,880 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:19:38,883 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 103 conjuncts are in the unsatisfiable core [2024-11-13 16:19:38,890 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:19:40,668 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 16:19:40,668 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:19:43,536 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:19:43,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 89 [2024-11-13 16:19:43,848 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 16:19:43,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944718706] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:19:43,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:19:43,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 30, 32] total 89 [2024-11-13 16:19:43,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086295426] [2024-11-13 16:19:43,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:19:43,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2024-11-13 16:19:43,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:19:43,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2024-11-13 16:19:43,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=7543, Unknown=0, NotChecked=0, Total=7832 [2024-11-13 16:19:43,856 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 89 states, 89 states have (on average 1.449438202247191) internal successors, (129), 89 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:19:52,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:19:52,958 INFO L93 Difference]: Finished difference Result 192 states and 232 transitions. [2024-11-13 16:19:52,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2024-11-13 16:19:52,959 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.449438202247191) internal successors, (129), 89 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2024-11-13 16:19:52,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:19:52,961 INFO L225 Difference]: With dead ends: 192 [2024-11-13 16:19:52,962 INFO L226 Difference]: Without dead ends: 187 [2024-11-13 16:19:52,965 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3714 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=879, Invalid=15633, Unknown=0, NotChecked=0, Total=16512 [2024-11-13 16:19:52,966 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 111 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 6147 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 6558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 6147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-11-13 16:19:52,967 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 438 Invalid, 6558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 6147 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2024-11-13 16:19:52,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2024-11-13 16:19:53,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 112. [2024-11-13 16:19:53,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.2162162162162162) internal successors, (135), 111 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:19:53,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 135 transitions. [2024-11-13 16:19:53,012 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 135 transitions. Word has length 50 [2024-11-13 16:19:53,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:19:53,013 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 135 transitions. [2024-11-13 16:19:53,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.449438202247191) internal successors, (129), 89 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:19:53,014 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 135 transitions. [2024-11-13 16:19:53,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-13 16:19:53,017 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:19:53,017 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:19:53,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 16:19:53,217 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:19:53,218 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:19:53,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:19:53,218 INFO L85 PathProgramCache]: Analyzing trace with hash 903809850, now seen corresponding path program 7 times [2024-11-13 16:19:53,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:19:53,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727598359] [2024-11-13 16:19:53,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:19:53,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:19:53,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:19:53,408 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-13 16:19:53,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:19:53,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727598359] [2024-11-13 16:19:53,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727598359] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:19:53,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332055520] [2024-11-13 16:19:53,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 16:19:53,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:19:53,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:19:53,411 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:19:53,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 16:19:53,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:19:53,514 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 16:19:53,516 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:19:53,626 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-13 16:19:53,627 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:19:53,716 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-13 16:19:53,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332055520] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:19:53,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:19:53,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-13 16:19:53,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045462918] [2024-11-13 16:19:53,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:19:53,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-13 16:19:53,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:19:53,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-13 16:19:53,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2024-11-13 16:19:53,719 INFO L87 Difference]: Start difference. First operand 112 states and 135 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:19:54,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:19:54,062 INFO L93 Difference]: Finished difference Result 189 states and 225 transitions. [2024-11-13 16:19:54,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 16:19:54,062 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2024-11-13 16:19:54,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:19:54,063 INFO L225 Difference]: With dead ends: 189 [2024-11-13 16:19:54,063 INFO L226 Difference]: Without dead ends: 86 [2024-11-13 16:19:54,064 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 89 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2024-11-13 16:19:54,064 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 5 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 16:19:54,065 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 65 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 16:19:54,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-13 16:19:54,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2024-11-13 16:19:54,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.2) internal successors, (102), 85 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:19:54,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2024-11-13 16:19:54,096 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 51 [2024-11-13 16:19:54,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:19:54,096 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2024-11-13 16:19:54,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:19:54,097 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2024-11-13 16:19:54,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-13 16:19:54,098 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:19:54,098 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:19:54,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-13 16:19:54,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:19:54,299 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:19:54,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:19:54,300 INFO L85 PathProgramCache]: Analyzing trace with hash -308207549, now seen corresponding path program 8 times [2024-11-13 16:19:54,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:19:54,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64155328] [2024-11-13 16:19:54,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:19:54,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:19:54,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:19:54,497 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-13 16:19:54,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:19:54,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64155328] [2024-11-13 16:19:54,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64155328] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:19:54,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247590483] [2024-11-13 16:19:54,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:19:54,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:19:54,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:19:54,500 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:19:54,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 16:19:54,598 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:19:54,598 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:19:54,600 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 16:19:54,602 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:19:54,691 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-13 16:19:54,691 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:19:54,808 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-13 16:19:54,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247590483] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:19:54,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:19:54,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-13 16:19:54,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503591488] [2024-11-13 16:19:54,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:19:54,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-13 16:19:54,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:19:54,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-13 16:19:54,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2024-11-13 16:19:54,811 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:19:55,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:19:55,048 INFO L93 Difference]: Finished difference Result 128 states and 157 transitions. [2024-11-13 16:19:55,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 16:19:55,049 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2024-11-13 16:19:55,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:19:55,050 INFO L225 Difference]: With dead ends: 128 [2024-11-13 16:19:55,050 INFO L226 Difference]: Without dead ends: 60 [2024-11-13 16:19:55,050 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2024-11-13 16:19:55,051 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 55 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 16:19:55,052 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 56 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 16:19:55,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-13 16:19:55,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-11-13 16:19:55,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:19:55,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2024-11-13 16:19:55,079 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 52 [2024-11-13 16:19:55,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:19:55,079 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2024-11-13 16:19:55,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:19:55,080 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2024-11-13 16:19:55,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-13 16:19:55,080 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:19:55,080 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:19:55,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 16:19:55,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-13 16:19:55,286 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:19:55,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:19:55,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1642133126, now seen corresponding path program 9 times [2024-11-13 16:19:55,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:19:55,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834169032] [2024-11-13 16:19:55,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:19:55,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:19:55,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:20:02,261 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 1 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:20:02,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:20:02,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834169032] [2024-11-13 16:20:02,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834169032] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:20:02,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641303152] [2024-11-13 16:20:02,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 16:20:02,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:20:02,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:20:02,265 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:20:02,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 16:20:02,391 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 16:20:02,391 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:20:02,396 WARN L253 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 156 conjuncts are in the unsatisfiable core [2024-11-13 16:20:02,401 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:20:09,357 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:20:09,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2024-11-13 16:20:09,636 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:20:09,636 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:21:30,469 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:21:30,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 89 [2024-11-13 16:21:32,149 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 3 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:21:32,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641303152] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:21:32,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:21:32,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 57, 57] total 158 [2024-11-13 16:21:32,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968605306] [2024-11-13 16:21:32,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:21:32,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2024-11-13 16:21:32,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:21:32,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2024-11-13 16:21:32,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1489, Invalid=23296, Unknown=21, NotChecked=0, Total=24806 [2024-11-13 16:21:32,157 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 158 states, 158 states have (on average 1.0696202531645569) internal successors, (169), 158 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:22:32,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 16:22:58,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 16:23:12,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:23:12,024 INFO L93 Difference]: Finished difference Result 367 states and 452 transitions. [2024-11-13 16:23:12,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2024-11-13 16:23:12,025 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 1.0696202531645569) internal successors, (169), 158 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2024-11-13 16:23:12,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:23:12,027 INFO L225 Difference]: With dead ends: 367 [2024-11-13 16:23:12,027 INFO L226 Difference]: Without dead ends: 222 [2024-11-13 16:23:12,033 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 16288 ImplicationChecksByTransitivity, 160.2s TimeCoverageRelationStatistics Valid=4804, Invalid=53491, Unknown=27, NotChecked=0, Total=58322 [2024-11-13 16:23:12,034 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 534 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 8362 mSolverCounterSat, 2651 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 11014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2651 IncrementalHoareTripleChecker+Valid, 8362 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.2s IncrementalHoareTripleChecker+Time [2024-11-13 16:23:12,034 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [534 Valid, 612 Invalid, 11014 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2651 Valid, 8362 Invalid, 1 Unknown, 0 Unchecked, 29.2s Time] [2024-11-13 16:23:12,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-11-13 16:23:12,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 108. [2024-11-13 16:23:12,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.205607476635514) internal successors, (129), 107 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:23:12,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 129 transitions. [2024-11-13 16:23:12,133 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 129 transitions. Word has length 59 [2024-11-13 16:23:12,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:23:12,133 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 129 transitions. [2024-11-13 16:23:12,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 1.0696202531645569) internal successors, (169), 158 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:23:12,134 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 129 transitions. [2024-11-13 16:23:12,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-13 16:23:12,134 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:23:12,135 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:23:12,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-13 16:23:12,335 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-13 16:23:12,335 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:23:12,336 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:23:12,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1442554205, now seen corresponding path program 10 times [2024-11-13 16:23:12,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:23:12,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407569097] [2024-11-13 16:23:12,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:23:12,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:23:12,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:23:12,616 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-13 16:23:12,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:23:12,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407569097] [2024-11-13 16:23:12,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407569097] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:23:12,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717848398] [2024-11-13 16:23:12,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 16:23:12,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:23:12,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:23:12,619 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:23:12,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 16:23:12,746 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 16:23:12,746 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:23:12,748 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 16:23:12,750 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:23:13,078 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-13 16:23:13,079 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:23:13,390 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-13 16:23:13,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717848398] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:23:13,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:23:13,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2024-11-13 16:23:13,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106116384] [2024-11-13 16:23:13,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:23:13,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-13 16:23:13,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:23:13,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-13 16:23:13,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2024-11-13 16:23:13,392 INFO L87 Difference]: Start difference. First operand 108 states and 129 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:23:14,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:23:14,118 INFO L93 Difference]: Finished difference Result 163 states and 199 transitions. [2024-11-13 16:23:14,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 16:23:14,119 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2024-11-13 16:23:14,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:23:14,121 INFO L225 Difference]: With dead ends: 163 [2024-11-13 16:23:14,121 INFO L226 Difference]: Without dead ends: 76 [2024-11-13 16:23:14,122 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 102 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=176, Invalid=946, Unknown=0, NotChecked=0, Total=1122 [2024-11-13 16:23:14,123 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 66 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 16:23:14,123 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 76 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 16:23:14,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-13 16:23:14,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2024-11-13 16:23:14,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 68 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:23:14,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2024-11-13 16:23:14,218 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 62 [2024-11-13 16:23:14,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:23:14,219 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2024-11-13 16:23:14,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:23:14,219 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2024-11-13 16:23:14,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-13 16:23:14,220 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:23:14,220 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:23:14,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-13 16:23:14,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-13 16:23:14,421 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:23:14,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:23:14,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1700627971, now seen corresponding path program 11 times [2024-11-13 16:23:14,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:23:14,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693991630] [2024-11-13 16:23:14,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:23:14,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:23:14,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:23:25,229 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 4 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:23:25,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:23:25,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693991630] [2024-11-13 16:23:25,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693991630] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:23:25,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492495681] [2024-11-13 16:23:25,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 16:23:25,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:23:25,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:23:25,232 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:23:25,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 16:23:25,411 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-13 16:23:25,411 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:23:25,416 WARN L253 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 177 conjuncts are in the unsatisfiable core [2024-11-13 16:23:25,419 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:23:29,971 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:23:29,972 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:23:40,388 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:23:40,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 86 treesize of output 235 [2024-11-13 16:23:42,710 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 16:23:42,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492495681] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:23:42,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:23:42,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 50, 48] total 134 [2024-11-13 16:23:42,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426250480] [2024-11-13 16:23:42,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:23:42,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2024-11-13 16:23:42,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:23:42,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2024-11-13 16:23:42,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=17355, Unknown=0, NotChecked=0, Total=17822 [2024-11-13 16:23:42,714 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand has 134 states, 134 states have (on average 1.2985074626865671) internal successors, (174), 134 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:24:08,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:24:08,748 INFO L93 Difference]: Finished difference Result 251 states and 292 transitions. [2024-11-13 16:24:08,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2024-11-13 16:24:08,750 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.2985074626865671) internal successors, (174), 134 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2024-11-13 16:24:08,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:24:08,752 INFO L225 Difference]: With dead ends: 251 [2024-11-13 16:24:08,752 INFO L226 Difference]: Without dead ends: 246 [2024-11-13 16:24:08,755 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9167 ImplicationChecksByTransitivity, 29.9s TimeCoverageRelationStatistics Valid=1635, Invalid=36977, Unknown=0, NotChecked=0, Total=38612 [2024-11-13 16:24:08,757 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 88 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 11618 mSolverCounterSat, 604 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 12222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 604 IncrementalHoareTripleChecker+Valid, 11618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2024-11-13 16:24:08,758 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 555 Invalid, 12222 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [604 Valid, 11618 Invalid, 0 Unknown, 0 Unchecked, 13.2s Time] [2024-11-13 16:24:08,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2024-11-13 16:24:08,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 144. [2024-11-13 16:24:08,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.1538461538461537) internal successors, (165), 143 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:24:08,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 165 transitions. [2024-11-13 16:24:08,888 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 165 transitions. Word has length 68 [2024-11-13 16:24:08,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:24:08,888 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 165 transitions. [2024-11-13 16:24:08,888 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.2985074626865671) internal successors, (174), 134 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:24:08,889 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 165 transitions. [2024-11-13 16:24:08,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-13 16:24:08,890 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:24:08,890 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:24:08,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-13 16:24:09,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:24:09,090 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:24:09,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:24:09,091 INFO L85 PathProgramCache]: Analyzing trace with hash -869268134, now seen corresponding path program 12 times [2024-11-13 16:24:09,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:24:09,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766589537] [2024-11-13 16:24:09,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:24:09,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:24:09,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:24:09,418 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-13 16:24:09,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:24:09,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766589537] [2024-11-13 16:24:09,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766589537] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:24:09,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053077334] [2024-11-13 16:24:09,419 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 16:24:09,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:24:09,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:24:09,421 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:24:09,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 16:24:09,566 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-13 16:24:09,566 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:24:09,568 INFO L255 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 16:24:09,571 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:24:09,916 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-13 16:24:09,916 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:24:10,123 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-13 16:24:10,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053077334] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:24:10,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:24:10,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 34 [2024-11-13 16:24:10,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473283450] [2024-11-13 16:24:10,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:24:10,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-13 16:24:10,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:24:10,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-13 16:24:10,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2024-11-13 16:24:10,125 INFO L87 Difference]: Start difference. First operand 144 states and 165 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:24:11,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:24:11,991 INFO L93 Difference]: Finished difference Result 297 states and 344 transitions. [2024-11-13 16:24:11,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-13 16:24:11,991 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2024-11-13 16:24:11,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:24:11,992 INFO L225 Difference]: With dead ends: 297 [2024-11-13 16:24:11,993 INFO L226 Difference]: Without dead ends: 135 [2024-11-13 16:24:11,993 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 124 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=315, Invalid=1755, Unknown=0, NotChecked=0, Total=2070 [2024-11-13 16:24:11,993 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 27 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 1805 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 2060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 1805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-13 16:24:11,994 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 136 Invalid, 2060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 1805 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-13 16:24:11,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-11-13 16:24:12,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 114. [2024-11-13 16:24:12,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.1327433628318584) internal successors, (128), 113 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:24:12,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 128 transitions. [2024-11-13 16:24:12,108 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 128 transitions. Word has length 69 [2024-11-13 16:24:12,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:24:12,108 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 128 transitions. [2024-11-13 16:24:12,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:24:12,108 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 128 transitions. [2024-11-13 16:24:12,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-13 16:24:12,109 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:24:12,109 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:24:12,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-13 16:24:12,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:24:12,309 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:24:12,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:24:12,310 INFO L85 PathProgramCache]: Analyzing trace with hash -2035226397, now seen corresponding path program 13 times [2024-11-13 16:24:12,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:24:12,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082376141] [2024-11-13 16:24:12,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:24:12,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:24:12,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:24:12,657 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2024-11-13 16:24:12,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:24:12,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082376141] [2024-11-13 16:24:12,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082376141] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:24:12,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775256557] [2024-11-13 16:24:12,658 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 16:24:12,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:24:12,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:24:12,661 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:24:12,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 16:24:12,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:24:12,820 INFO L255 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 16:24:12,822 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:24:13,065 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2024-11-13 16:24:13,065 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:24:13,227 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2024-11-13 16:24:13,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775256557] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:24:13,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:24:13,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-11-13 16:24:13,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225520997] [2024-11-13 16:24:13,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:24:13,228 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-13 16:24:13,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:24:13,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-13 16:24:13,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2024-11-13 16:24:13,229 INFO L87 Difference]: Start difference. First operand 114 states and 128 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:24:13,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:24:13,638 INFO L93 Difference]: Finished difference Result 167 states and 187 transitions. [2024-11-13 16:24:13,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 16:24:13,639 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2024-11-13 16:24:13,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:24:13,640 INFO L225 Difference]: With dead ends: 167 [2024-11-13 16:24:13,640 INFO L226 Difference]: Without dead ends: 78 [2024-11-13 16:24:13,641 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 120 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2024-11-13 16:24:13,641 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 69 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 16:24:13,641 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 56 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 16:24:13,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-13 16:24:13,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-11-13 16:24:13,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 77 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:24:13,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2024-11-13 16:24:13,735 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 70 [2024-11-13 16:24:13,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:24:13,735 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2024-11-13 16:24:13,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:24:13,736 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2024-11-13 16:24:13,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-13 16:24:13,736 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:24:13,736 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:24:13,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-13 16:24:13,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-13 16:24:13,937 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:24:13,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:24:13,937 INFO L85 PathProgramCache]: Analyzing trace with hash 58987418, now seen corresponding path program 14 times [2024-11-13 16:24:13,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:24:13,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095362600] [2024-11-13 16:24:13,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:24:13,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:24:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:24:29,454 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 9 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:24:29,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:24:29,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095362600] [2024-11-13 16:24:29,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095362600] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:24:29,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089861101] [2024-11-13 16:24:29,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:24:29,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:24:29,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:24:29,458 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:24:29,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 16:24:29,685 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:24:29,686 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:24:29,689 WARN L253 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 213 conjuncts are in the unsatisfiable core [2024-11-13 16:24:29,693 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:24:29,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 16:24:37,918 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:24:37,918 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:24:56,727 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-13 16:24:56,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089861101] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:24:56,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:24:56,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 60, 56] total 164 [2024-11-13 16:24:56,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754970928] [2024-11-13 16:24:56,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:24:56,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2024-11-13 16:24:56,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:24:56,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2024-11-13 16:24:56,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=26189, Unknown=0, NotChecked=0, Total=26732 [2024-11-13 16:24:56,733 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 164 states, 164 states have (on average 1.2378048780487805) internal successors, (203), 164 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:25:34,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:25:34,900 INFO L93 Difference]: Finished difference Result 183 states and 208 transitions. [2024-11-13 16:25:34,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2024-11-13 16:25:34,901 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 164 states have (on average 1.2378048780487805) internal successors, (203), 164 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2024-11-13 16:25:34,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:25:34,902 INFO L225 Difference]: With dead ends: 183 [2024-11-13 16:25:34,902 INFO L226 Difference]: Without dead ends: 179 [2024-11-13 16:25:34,905 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12384 ImplicationChecksByTransitivity, 50.7s TimeCoverageRelationStatistics Valid=1533, Invalid=52989, Unknown=0, NotChecked=0, Total=54522 [2024-11-13 16:25:34,906 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 48 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 13614 mSolverCounterSat, 569 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 14183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 569 IncrementalHoareTripleChecker+Valid, 13614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.1s IncrementalHoareTripleChecker+Time [2024-11-13 16:25:34,906 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 521 Invalid, 14183 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [569 Valid, 13614 Invalid, 0 Unknown, 0 Unchecked, 18.1s Time] [2024-11-13 16:25:34,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-11-13 16:25:35,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 105. [2024-11-13 16:25:35,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.125) internal successors, (117), 104 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:25:35,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2024-11-13 16:25:35,057 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 77 [2024-11-13 16:25:35,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:25:35,058 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2024-11-13 16:25:35,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 164 states have (on average 1.2378048780487805) internal successors, (203), 164 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:25:35,058 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2024-11-13 16:25:35,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-13 16:25:35,059 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:25:35,059 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:25:35,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-13 16:25:35,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-13 16:25:35,260 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:25:35,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:25:35,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1959682083, now seen corresponding path program 15 times [2024-11-13 16:25:35,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:25:35,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499171484] [2024-11-13 16:25:35,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:25:35,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:25:35,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:25:35,730 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2024-11-13 16:25:35,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:25:35,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499171484] [2024-11-13 16:25:35,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499171484] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:25:35,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712558456] [2024-11-13 16:25:35,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 16:25:35,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:25:35,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:25:35,734 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:25:35,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 16:25:35,962 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-13 16:25:35,962 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:25:35,966 INFO L255 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-13 16:25:35,969 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:25:36,338 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2024-11-13 16:25:36,338 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:25:36,614 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2024-11-13 16:25:36,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712558456] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:25:36,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:25:36,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2024-11-13 16:25:36,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254565323] [2024-11-13 16:25:36,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:25:36,615 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-13 16:25:36,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:25:36,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-13 16:25:36,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2024-11-13 16:25:36,617 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:25:37,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:25:37,441 INFO L93 Difference]: Finished difference Result 258 states and 289 transitions. [2024-11-13 16:25:37,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 16:25:37,442 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2024-11-13 16:25:37,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:25:37,443 INFO L225 Difference]: With dead ends: 258 [2024-11-13 16:25:37,443 INFO L226 Difference]: Without dead ends: 106 [2024-11-13 16:25:37,444 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 134 SyntacticMatches, 13 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2024-11-13 16:25:37,444 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 16:25:37,445 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 77 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 16:25:37,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-13 16:25:37,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2024-11-13 16:25:37,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.1238095238095238) internal successors, (118), 105 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:25:37,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 118 transitions. [2024-11-13 16:25:37,608 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 118 transitions. Word has length 78 [2024-11-13 16:25:37,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:25:37,609 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 118 transitions. [2024-11-13 16:25:37,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:25:37,609 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 118 transitions. [2024-11-13 16:25:37,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-13 16:25:37,610 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:25:37,610 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:25:37,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-13 16:25:37,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-13 16:25:37,811 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:25:37,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:25:37,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1866437254, now seen corresponding path program 16 times [2024-11-13 16:25:37,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:25:37,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716001929] [2024-11-13 16:25:37,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:25:37,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:25:37,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:25:38,265 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2024-11-13 16:25:38,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:25:38,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716001929] [2024-11-13 16:25:38,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716001929] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:25:38,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793227746] [2024-11-13 16:25:38,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 16:25:38,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:25:38,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:25:38,269 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:25:38,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 16:25:38,418 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 16:25:38,418 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:25:38,421 INFO L255 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-13 16:25:38,423 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:25:38,986 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2024-11-13 16:25:38,986 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:25:39,472 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2024-11-13 16:25:39,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793227746] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:25:39,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:25:39,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2024-11-13 16:25:39,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407693318] [2024-11-13 16:25:39,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:25:39,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-13 16:25:39,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:25:39,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-13 16:25:39,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1265, Unknown=0, NotChecked=0, Total=1482 [2024-11-13 16:25:39,474 INFO L87 Difference]: Start difference. First operand 106 states and 118 transitions. Second operand has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:25:40,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:25:40,428 INFO L93 Difference]: Finished difference Result 174 states and 200 transitions. [2024-11-13 16:25:40,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-13 16:25:40,429 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2024-11-13 16:25:40,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:25:40,430 INFO L225 Difference]: With dead ends: 174 [2024-11-13 16:25:40,430 INFO L226 Difference]: Without dead ends: 87 [2024-11-13 16:25:40,431 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 128 SyntacticMatches, 8 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=307, Invalid=1763, Unknown=0, NotChecked=0, Total=2070 [2024-11-13 16:25:40,431 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 82 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 16:25:40,432 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 108 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 16:25:40,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-13 16:25:40,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2024-11-13 16:25:40,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.1046511627906976) internal successors, (95), 86 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:25:40,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2024-11-13 16:25:40,557 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 79 [2024-11-13 16:25:40,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:25:40,557 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2024-11-13 16:25:40,557 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:25:40,558 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2024-11-13 16:25:40,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-13 16:25:40,558 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:25:40,558 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:25:40,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-13 16:25:40,759 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-13 16:25:40,759 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:25:40,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:25:40,759 INFO L85 PathProgramCache]: Analyzing trace with hash -248504349, now seen corresponding path program 17 times [2024-11-13 16:25:40,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:25:40,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595350746] [2024-11-13 16:25:40,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:25:40,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:25:41,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:25:59,616 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 30 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:25:59,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:25:59,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595350746] [2024-11-13 16:25:59,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595350746] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:25:59,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105574959] [2024-11-13 16:25:59,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 16:25:59,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:25:59,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:25:59,619 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:25:59,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 16:26:00,666 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-13 16:26:00,666 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:26:00,673 WARN L253 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 259 conjuncts are in the unsatisfiable core [2024-11-13 16:26:00,683 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:26:00,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 16:26:00,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 16:26:00,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 16:26:00,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 16:26:00,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 16:26:00,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 16:26:00,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 16:26:08,245 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:26:08,245 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:26:32,065 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-13 16:26:32,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105574959] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:26:32,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:26:32,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 69, 64] total 169 [2024-11-13 16:26:32,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918704850] [2024-11-13 16:26:32,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:26:32,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 169 states [2024-11-13 16:26:32,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:26:32,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2024-11-13 16:26:32,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=578, Invalid=27814, Unknown=0, NotChecked=0, Total=28392 [2024-11-13 16:26:32,069 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand has 169 states, 169 states have (on average 1.2248520710059172) internal successors, (207), 169 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:27:16,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:27:16,843 INFO L93 Difference]: Finished difference Result 190 states and 212 transitions. [2024-11-13 16:27:16,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2024-11-13 16:27:16,843 INFO L78 Accepts]: Start accepts. Automaton has has 169 states, 169 states have (on average 1.2248520710059172) internal successors, (207), 169 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2024-11-13 16:27:16,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:27:16,845 INFO L225 Difference]: With dead ends: 190 [2024-11-13 16:27:16,845 INFO L226 Difference]: Without dead ends: 186 [2024-11-13 16:27:16,847 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13239 ImplicationChecksByTransitivity, 60.4s TimeCoverageRelationStatistics Valid=1958, Invalid=58312, Unknown=0, NotChecked=0, Total=60270 [2024-11-13 16:27:16,848 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 58 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 16319 mSolverCounterSat, 701 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 17020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 701 IncrementalHoareTripleChecker+Valid, 16319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.2s IncrementalHoareTripleChecker+Time [2024-11-13 16:27:16,848 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 582 Invalid, 17020 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [701 Valid, 16319 Invalid, 0 Unknown, 0 Unchecked, 20.2s Time] [2024-11-13 16:27:16,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2024-11-13 16:27:17,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 117. [2024-11-13 16:27:17,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.1120689655172413) internal successors, (129), 116 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:27:17,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 129 transitions. [2024-11-13 16:27:17,031 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 129 transitions. Word has length 86 [2024-11-13 16:27:17,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:27:17,032 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 129 transitions. [2024-11-13 16:27:17,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 169 states, 169 states have (on average 1.2248520710059172) internal successors, (207), 169 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:27:17,032 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 129 transitions. [2024-11-13 16:27:17,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-13 16:27:17,033 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:27:17,033 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:27:17,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-13 16:27:17,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:27:17,233 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:27:17,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:27:17,234 INFO L85 PathProgramCache]: Analyzing trace with hash 604604282, now seen corresponding path program 18 times [2024-11-13 16:27:17,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:27:17,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313661221] [2024-11-13 16:27:17,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:27:17,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:27:17,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:27:17,599 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2024-11-13 16:27:17,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:27:17,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313661221] [2024-11-13 16:27:17,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313661221] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:27:17,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37816877] [2024-11-13 16:27:17,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 16:27:17,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:27:17,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:27:17,601 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:27:17,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-13 16:27:17,781 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-13 16:27:17,782 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:27:17,784 INFO L255 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-13 16:27:17,786 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:27:18,129 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2024-11-13 16:27:18,130 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:27:18,440 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2024-11-13 16:27:18,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37816877] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:27:18,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:27:18,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2024-11-13 16:27:18,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128906487] [2024-11-13 16:27:18,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:27:18,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-13 16:27:18,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:27:18,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-13 16:27:18,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2024-11-13 16:27:18,442 INFO L87 Difference]: Start difference. First operand 117 states and 129 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:27:19,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:27:19,303 INFO L93 Difference]: Finished difference Result 288 states and 319 transitions. [2024-11-13 16:27:19,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-13 16:27:19,303 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2024-11-13 16:27:19,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:27:19,305 INFO L225 Difference]: With dead ends: 288 [2024-11-13 16:27:19,305 INFO L226 Difference]: Without dead ends: 118 [2024-11-13 16:27:19,305 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 149 SyntacticMatches, 15 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2024-11-13 16:27:19,306 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 16:27:19,306 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 74 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 16:27:19,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-13 16:27:19,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2024-11-13 16:27:19,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.1111111111111112) internal successors, (130), 117 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:27:19,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 130 transitions. [2024-11-13 16:27:19,492 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 130 transitions. Word has length 87 [2024-11-13 16:27:19,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:27:19,492 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 130 transitions. [2024-11-13 16:27:19,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:27:19,492 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 130 transitions. [2024-11-13 16:27:19,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-13 16:27:19,493 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:27:19,493 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:27:19,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-13 16:27:19,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:27:19,694 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:27:19,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:27:19,694 INFO L85 PathProgramCache]: Analyzing trace with hash 403409923, now seen corresponding path program 19 times [2024-11-13 16:27:19,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:27:19,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645672565] [2024-11-13 16:27:19,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:27:19,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:27:19,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:27:20,056 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2024-11-13 16:27:20,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:27:20,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645672565] [2024-11-13 16:27:20,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645672565] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:27:20,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835386699] [2024-11-13 16:27:20,056 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 16:27:20,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:27:20,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:27:20,058 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:27:20,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-13 16:27:20,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:27:20,228 INFO L255 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-13 16:27:20,229 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:27:20,499 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2024-11-13 16:27:20,499 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:27:20,777 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2024-11-13 16:27:20,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835386699] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:27:20,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:27:20,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2024-11-13 16:27:20,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39201563] [2024-11-13 16:27:20,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:27:20,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-13 16:27:20,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:27:20,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-13 16:27:20,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2024-11-13 16:27:20,780 INFO L87 Difference]: Start difference. First operand 118 states and 130 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:27:21,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:27:21,343 INFO L93 Difference]: Finished difference Result 193 states and 219 transitions. [2024-11-13 16:27:21,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-13 16:27:21,344 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2024-11-13 16:27:21,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:27:21,345 INFO L225 Difference]: With dead ends: 193 [2024-11-13 16:27:21,345 INFO L226 Difference]: Without dead ends: 96 [2024-11-13 16:27:21,345 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 150 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2024-11-13 16:27:21,346 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 27 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 16:27:21,346 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 39 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 16:27:21,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-13 16:27:21,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2024-11-13 16:27:21,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0947368421052632) internal successors, (104), 95 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:27:21,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2024-11-13 16:27:21,479 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 88 [2024-11-13 16:27:21,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:27:21,479 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2024-11-13 16:27:21,480 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:27:21,480 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2024-11-13 16:27:21,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-13 16:27:21,480 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:27:21,480 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:27:21,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-13 16:27:21,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-13 16:27:21,681 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:27:21,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:27:21,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1267280454, now seen corresponding path program 20 times [2024-11-13 16:27:21,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:27:21,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457358206] [2024-11-13 16:27:21,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:27:21,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:27:22,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:27:41,475 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 25 proven. 299 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:27:41,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:27:41,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457358206] [2024-11-13 16:27:41,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457358206] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:27:41,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504163037] [2024-11-13 16:27:41,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:27:41,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:27:41,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:27:41,478 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:27:41,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-13 16:27:41,645 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:27:41,645 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:27:41,649 WARN L253 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 281 conjuncts are in the unsatisfiable core [2024-11-13 16:27:41,656 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:27:41,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 16:27:50,205 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:27:50,205 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:28:13,688 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-13 16:28:13,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504163037] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:28:13,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:28:13,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 78, 72] total 190 [2024-11-13 16:28:13,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885412154] [2024-11-13 16:28:13,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:28:13,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2024-11-13 16:28:13,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:28:13,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2024-11-13 16:28:13,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=779, Invalid=35131, Unknown=0, NotChecked=0, Total=35910 [2024-11-13 16:28:13,693 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand has 190 states, 190 states have (on average 1.2052631578947368) internal successors, (229), 190 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:05,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:29:05,446 INFO L93 Difference]: Finished difference Result 346 states and 387 transitions. [2024-11-13 16:29:05,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2024-11-13 16:29:05,447 INFO L78 Accepts]: Start accepts. Automaton has has 190 states, 190 states have (on average 1.2052631578947368) internal successors, (229), 190 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2024-11-13 16:29:05,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:29:05,450 INFO L225 Difference]: With dead ends: 346 [2024-11-13 16:29:05,450 INFO L226 Difference]: Without dead ends: 341 [2024-11-13 16:29:05,453 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21391 ImplicationChecksByTransitivity, 64.4s TimeCoverageRelationStatistics Valid=3263, Invalid=78247, Unknown=0, NotChecked=0, Total=81510 [2024-11-13 16:29:05,456 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 99 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 21318 mSolverCounterSat, 1014 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 22332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1014 IncrementalHoareTripleChecker+Valid, 21318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.3s IncrementalHoareTripleChecker+Time [2024-11-13 16:29:05,456 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 608 Invalid, 22332 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1014 Valid, 21318 Invalid, 0 Unknown, 0 Unchecked, 24.3s Time] [2024-11-13 16:29:05,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2024-11-13 16:29:05,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 201. [2024-11-13 16:29:05,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.11) internal successors, (222), 200 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:05,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 222 transitions. [2024-11-13 16:29:05,835 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 222 transitions. Word has length 95 [2024-11-13 16:29:05,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:29:05,835 INFO L471 AbstractCegarLoop]: Abstraction has 201 states and 222 transitions. [2024-11-13 16:29:05,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 190 states, 190 states have (on average 1.2052631578947368) internal successors, (229), 190 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:05,836 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 222 transitions. [2024-11-13 16:29:05,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-13 16:29:05,837 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:29:05,837 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:29:05,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-13 16:29:06,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:06,038 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:29:06,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:06,038 INFO L85 PathProgramCache]: Analyzing trace with hash -742232829, now seen corresponding path program 21 times [2024-11-13 16:29:06,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:06,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820415734] [2024-11-13 16:29:06,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:06,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:06,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:06,523 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2024-11-13 16:29:06,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:06,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820415734] [2024-11-13 16:29:06,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820415734] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:29:06,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032667411] [2024-11-13 16:29:06,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 16:29:06,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:06,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:29:06,526 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:29:06,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-13 16:29:06,755 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-13 16:29:06,755 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:29:06,759 INFO L255 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-13 16:29:06,761 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:29:07,311 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2024-11-13 16:29:07,311 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:29:07,891 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2024-11-13 16:29:07,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032667411] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:29:07,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:29:07,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 49 [2024-11-13 16:29:07,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623206681] [2024-11-13 16:29:07,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:29:07,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-13 16:29:07,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:07,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-13 16:29:07,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=2029, Unknown=0, NotChecked=0, Total=2352 [2024-11-13 16:29:07,894 INFO L87 Difference]: Start difference. First operand 201 states and 222 transitions. Second operand has 49 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 49 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:11,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:29:11,243 INFO L93 Difference]: Finished difference Result 414 states and 461 transitions. [2024-11-13 16:29:11,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-13 16:29:11,244 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 49 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2024-11-13 16:29:11,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:29:11,245 INFO L225 Difference]: With dead ends: 414 [2024-11-13 16:29:11,245 INFO L226 Difference]: Without dead ends: 186 [2024-11-13 16:29:11,246 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 172 SyntacticMatches, 10 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=630, Invalid=3792, Unknown=0, NotChecked=0, Total=4422 [2024-11-13 16:29:11,247 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 34 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 2720 mSolverCounterSat, 385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 3105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 385 IncrementalHoareTripleChecker+Valid, 2720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-13 16:29:11,247 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 181 Invalid, 3105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 2720 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-13 16:29:11,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2024-11-13 16:29:11,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 156. [2024-11-13 16:29:11,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.096774193548387) internal successors, (170), 155 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:11,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 170 transitions. [2024-11-13 16:29:11,574 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 170 transitions. Word has length 96 [2024-11-13 16:29:11,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:29:11,574 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 170 transitions. [2024-11-13 16:29:11,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 49 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:11,575 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 170 transitions. [2024-11-13 16:29:11,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-13 16:29:11,576 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:29:11,576 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:29:11,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-13 16:29:11,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-13 16:29:11,776 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:29:11,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:11,777 INFO L85 PathProgramCache]: Analyzing trace with hash 701321434, now seen corresponding path program 22 times [2024-11-13 16:29:11,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:11,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767871189] [2024-11-13 16:29:11,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:11,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:11,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:12,172 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2024-11-13 16:29:12,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:12,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767871189] [2024-11-13 16:29:12,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767871189] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:29:12,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967443024] [2024-11-13 16:29:12,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 16:29:12,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:12,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:29:12,174 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:29:12,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-13 16:29:12,333 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 16:29:12,333 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:29:12,335 INFO L255 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-13 16:29:12,337 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:29:12,966 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2024-11-13 16:29:12,966 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:29:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2024-11-13 16:29:13,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967443024] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:29:13,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:29:13,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 49 [2024-11-13 16:29:13,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896958011] [2024-11-13 16:29:13,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:29:13,567 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-13 16:29:13,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:13,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-13 16:29:13,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=2021, Unknown=0, NotChecked=0, Total=2352 [2024-11-13 16:29:13,568 INFO L87 Difference]: Start difference. First operand 156 states and 170 transitions. Second operand has 49 states, 49 states have (on average 2.0) internal successors, (98), 49 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:14,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:29:14,603 INFO L93 Difference]: Finished difference Result 227 states and 247 transitions. [2024-11-13 16:29:14,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-13 16:29:14,603 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 49 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2024-11-13 16:29:14,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:29:14,605 INFO L225 Difference]: With dead ends: 227 [2024-11-13 16:29:14,605 INFO L226 Difference]: Without dead ends: 105 [2024-11-13 16:29:14,605 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 156 SyntacticMatches, 10 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=474, Invalid=2832, Unknown=0, NotChecked=0, Total=3306 [2024-11-13 16:29:14,606 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 98 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 16:29:14,606 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 92 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 16:29:14,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-13 16:29:14,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2024-11-13 16:29:14,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0865384615384615) internal successors, (113), 104 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:14,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 113 transitions. [2024-11-13 16:29:14,790 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 113 transitions. Word has length 97 [2024-11-13 16:29:14,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:29:14,790 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 113 transitions. [2024-11-13 16:29:14,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 49 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:14,791 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 113 transitions. [2024-11-13 16:29:14,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-13 16:29:14,792 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:29:14,792 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:29:14,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-13 16:29:14,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:14,992 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:29:14,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:14,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1526464061, now seen corresponding path program 23 times [2024-11-13 16:29:14,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:14,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220202585] [2024-11-13 16:29:14,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:14,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:15,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 28 proven. 377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:38,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:38,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220202585] [2024-11-13 16:29:38,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220202585] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:29:38,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254887435] [2024-11-13 16:29:38,832 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 16:29:38,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:38,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:29:38,834 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:29:38,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-13 16:29:45,564 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-13 16:29:45,564 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:29:45,587 WARN L253 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 315 conjuncts are in the unsatisfiable core [2024-11-13 16:29:45,594 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:29:46,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 16:30:00,560 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:30:00,560 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:30:40,124 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-13 16:30:40,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254887435] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:30:40,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:30:40,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 87, 80] total 218 [2024-11-13 16:30:40,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414290383] [2024-11-13 16:30:40,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:30:40,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 218 states [2024-11-13 16:30:40,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:30:40,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 218 interpolants. [2024-11-13 16:30:40,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=755, Invalid=46551, Unknown=0, NotChecked=0, Total=47306 [2024-11-13 16:30:40,131 INFO L87 Difference]: Start difference. First operand 105 states and 113 transitions. Second operand has 218 states, 218 states have (on average 1.1788990825688073) internal successors, (257), 218 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:31:46,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:31:46,997 INFO L93 Difference]: Finished difference Result 376 states and 418 transitions. [2024-11-13 16:31:46,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2024-11-13 16:31:46,998 INFO L78 Accepts]: Start accepts. Automaton has has 218 states, 218 states have (on average 1.1788990825688073) internal successors, (257), 218 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2024-11-13 16:31:46,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:31:46,999 INFO L225 Difference]: With dead ends: 376 [2024-11-13 16:31:46,999 INFO L226 Difference]: Without dead ends: 371 [2024-11-13 16:31:47,001 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 327 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23141 ImplicationChecksByTransitivity, 100.2s TimeCoverageRelationStatistics Valid=3389, Invalid=104523, Unknown=0, NotChecked=0, Total=107912 [2024-11-13 16:31:47,002 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 136 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 26097 mSolverCounterSat, 1158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 27255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1158 IncrementalHoareTripleChecker+Valid, 26097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.9s IncrementalHoareTripleChecker+Time [2024-11-13 16:31:47,002 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 593 Invalid, 27255 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1158 Valid, 26097 Invalid, 0 Unknown, 0 Unchecked, 28.9s Time] [2024-11-13 16:31:47,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2024-11-13 16:31:47,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 231. [2024-11-13 16:31:47,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.1) internal successors, (253), 230 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:31:47,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 253 transitions. [2024-11-13 16:31:47,382 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 253 transitions. Word has length 104 [2024-11-13 16:31:47,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:31:47,383 INFO L471 AbstractCegarLoop]: Abstraction has 231 states and 253 transitions. [2024-11-13 16:31:47,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 218 states, 218 states have (on average 1.1788990825688073) internal successors, (257), 218 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:31:47,383 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 253 transitions. [2024-11-13 16:31:47,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-11-13 16:31:47,384 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:31:47,384 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:31:47,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-13 16:31:47,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-13 16:31:47,585 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:31:47,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:31:47,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1102503526, now seen corresponding path program 24 times [2024-11-13 16:31:47,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:31:47,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454319910] [2024-11-13 16:31:47,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:31:47,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:31:47,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:31:48,135 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 46 proven. 54 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2024-11-13 16:31:48,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:31:48,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454319910] [2024-11-13 16:31:48,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454319910] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:31:48,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258600749] [2024-11-13 16:31:48,135 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 16:31:48,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:31:48,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:31:48,138 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:31:48,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-13 16:31:48,659 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-13 16:31:48,659 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:31:48,662 INFO L255 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-13 16:31:48,664 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:31:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2024-11-13 16:31:48,991 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:31:49,255 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2024-11-13 16:31:49,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258600749] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:31:49,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:31:49,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2024-11-13 16:31:49,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181236135] [2024-11-13 16:31:49,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:31:49,256 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-13 16:31:49,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:31:49,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-13 16:31:49,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2024-11-13 16:31:49,258 INFO L87 Difference]: Start difference. First operand 231 states and 253 transitions. Second operand has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:31:50,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:31:50,487 INFO L93 Difference]: Finished difference Result 392 states and 427 transitions. [2024-11-13 16:31:50,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-13 16:31:50,488 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2024-11-13 16:31:50,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:31:50,490 INFO L225 Difference]: With dead ends: 392 [2024-11-13 16:31:50,490 INFO L226 Difference]: Without dead ends: 175 [2024-11-13 16:31:50,491 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 179 SyntacticMatches, 19 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2024-11-13 16:31:50,491 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 5 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 16:31:50,491 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 83 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 16:31:50,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-11-13 16:31:50,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2024-11-13 16:31:50,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.0919540229885059) internal successors, (190), 174 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:31:50,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 190 transitions. [2024-11-13 16:31:50,792 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 190 transitions. Word has length 105 [2024-11-13 16:31:50,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:31:50,793 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 190 transitions. [2024-11-13 16:31:50,793 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:31:50,793 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 190 transitions. [2024-11-13 16:31:50,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-13 16:31:50,793 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:31:50,794 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:31:50,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-13 16:31:50,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-13 16:31:50,994 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:31:50,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:31:50,994 INFO L85 PathProgramCache]: Analyzing trace with hash 796947939, now seen corresponding path program 25 times [2024-11-13 16:31:50,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:31:50,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810382487] [2024-11-13 16:31:50,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:31:50,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:31:51,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:31:51,448 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-11-13 16:31:51,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:31:51,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810382487] [2024-11-13 16:31:51,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810382487] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:31:51,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485930485] [2024-11-13 16:31:51,449 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 16:31:51,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:31:51,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:31:51,451 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:31:51,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-13 16:31:51,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:31:51,639 INFO L255 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-13 16:31:51,640 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:31:51,899 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-11-13 16:31:51,899 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:31:52,165 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-11-13 16:31:52,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485930485] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:31:52,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:31:52,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2024-11-13 16:31:52,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977204329] [2024-11-13 16:31:52,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:31:52,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-13 16:31:52,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:31:52,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-13 16:31:52,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=901, Unknown=0, NotChecked=0, Total=1190 [2024-11-13 16:31:52,167 INFO L87 Difference]: Start difference. First operand 175 states and 190 transitions. Second operand has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:31:52,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:31:52,822 INFO L93 Difference]: Finished difference Result 252 states and 279 transitions. [2024-11-13 16:31:52,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-13 16:31:52,822 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2024-11-13 16:31:52,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:31:52,823 INFO L225 Difference]: With dead ends: 252 [2024-11-13 16:31:52,824 INFO L226 Difference]: Without dead ends: 114 [2024-11-13 16:31:52,824 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 180 SyntacticMatches, 20 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=302, Invalid=958, Unknown=0, NotChecked=0, Total=1260 [2024-11-13 16:31:52,825 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 27 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 16:31:52,825 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 65 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 16:31:52,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-13 16:31:53,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2024-11-13 16:31:53,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.079646017699115) internal successors, (122), 113 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:31:53,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 122 transitions. [2024-11-13 16:31:53,098 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 122 transitions. Word has length 106 [2024-11-13 16:31:53,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:31:53,098 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 122 transitions. [2024-11-13 16:31:53,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:31:53,099 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 122 transitions. [2024-11-13 16:31:53,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-13 16:31:53,099 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:31:53,099 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:31:53,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-13 16:31:53,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-13 16:31:53,300 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:31:53,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:31:53,300 INFO L85 PathProgramCache]: Analyzing trace with hash 939085786, now seen corresponding path program 26 times [2024-11-13 16:31:53,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:31:53,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752166060] [2024-11-13 16:31:53,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:31:53,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:31:53,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:32:21,531 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 49 proven. 446 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:32:21,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:32:21,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752166060] [2024-11-13 16:32:21,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752166060] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:32:21,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936833260] [2024-11-13 16:32:21,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:32:21,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:32:21,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:32:21,534 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:32:21,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f674795-12e6-40c6-b035-adb95fe437ca/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-13 16:32:21,744 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:32:21,745 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:32:21,751 WARN L253 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 349 conjuncts are in the unsatisfiable core [2024-11-13 16:32:21,756 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:32:21,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 16:32:35,618 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:32:35,618 INFO L311 TraceCheckSpWp]: Computing backward predicates...