./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-s_file-12.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-s_file-12.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya --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 26d5f48c3aaa4f87ce3b022933cd3bb4d238eb5e6d3164b471af63fd7f3cd88c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:21:30,774 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:21:30,839 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 00:21:30,843 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:21:30,844 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:21:30,866 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:21:30,867 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:21:30,868 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:21:30,868 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:21:30,869 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:21:30,869 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:21:30,870 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:21:30,871 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:21:30,871 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:21:30,872 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:21:30,872 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:21:30,873 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 00:21:30,873 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:21:30,874 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:21:30,874 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:21:30,874 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:21:30,875 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 00:21:30,875 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:21:30,876 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 00:21:30,876 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:21:30,876 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 00:21:30,877 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:21:30,877 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:21:30,878 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:21:30,878 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:21:30,878 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:21:30,879 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:21:30,879 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:21:30,879 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:21:30,879 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 00:21:30,880 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:21:30,880 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:21:30,880 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:21:30,880 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:21:30,880 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 00:21:30,881 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:21:30,881 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:21:30,881 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 26d5f48c3aaa4f87ce3b022933cd3bb4d238eb5e6d3164b471af63fd7f3cd88c [2023-11-29 00:21:31,117 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:21:31,137 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:21:31,140 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:21:31,141 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:21:31,141 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:21:31,142 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-s_file-12.i [2023-11-29 00:21:33,905 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:21:34,095 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:21:34,095 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-s_file-12.i [2023-11-29 00:21:34,105 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/data/0fdcd0526/94e737ac29314022928339e96c33e4ba/FLAG57ddfdf6b [2023-11-29 00:21:34,120 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/data/0fdcd0526/94e737ac29314022928339e96c33e4ba [2023-11-29 00:21:34,122 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:21:34,128 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:21:34,130 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:21:34,130 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:21:34,135 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:21:34,136 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:21:34" (1/1) ... [2023-11-29 00:21:34,137 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64451c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:34, skipping insertion in model container [2023-11-29 00:21:34,137 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:21:34" (1/1) ... [2023-11-29 00:21:34,167 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:21:34,310 WARN L240 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_007b26e5-5f4d-41da-b3c4-aede70d67f8a/sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-s_file-12.i[916,929] [2023-11-29 00:21:34,364 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:21:34,375 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:21:34,388 WARN L240 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_007b26e5-5f4d-41da-b3c4-aede70d67f8a/sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-s_file-12.i[916,929] [2023-11-29 00:21:34,425 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:21:34,447 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:21:34,447 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:34 WrapperNode [2023-11-29 00:21:34,447 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:21:34,449 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:21:34,449 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:21:34,449 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:21:34,456 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:34" (1/1) ... [2023-11-29 00:21:34,470 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:34" (1/1) ... [2023-11-29 00:21:34,516 INFO L138 Inliner]: procedures = 26, calls = 151, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 386 [2023-11-29 00:21:34,516 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:21:34,517 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:21:34,517 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:21:34,517 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:21:34,528 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:34" (1/1) ... [2023-11-29 00:21:34,529 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:34" (1/1) ... [2023-11-29 00:21:34,535 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:34" (1/1) ... [2023-11-29 00:21:34,556 INFO L175 MemorySlicer]: Split 123 memory accesses to 2 slices as follows [2, 121]. 98 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 11]. The 14 writes are split as follows [0, 14]. [2023-11-29 00:21:34,556 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:34" (1/1) ... [2023-11-29 00:21:34,556 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:34" (1/1) ... [2023-11-29 00:21:34,578 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:34" (1/1) ... [2023-11-29 00:21:34,583 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:34" (1/1) ... [2023-11-29 00:21:34,587 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:34" (1/1) ... [2023-11-29 00:21:34,590 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:34" (1/1) ... [2023-11-29 00:21:34,597 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:21:34,598 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:21:34,599 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:21:34,599 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:21:34,600 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:34" (1/1) ... [2023-11-29 00:21:34,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:21:34,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:34,624 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:21:34,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:21:34,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:21:34,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 00:21:34,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 00:21:34,659 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 00:21:34,659 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 00:21:34,659 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 00:21:34,660 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 00:21:34,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:21:34,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 00:21:34,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:21:34,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:21:34,764 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:21:34,766 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:21:35,162 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:21:35,196 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:21:35,196 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 00:21:35,197 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:21:35 BoogieIcfgContainer [2023-11-29 00:21:35,197 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:21:35,200 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:21:35,200 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:21:35,203 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:21:35,204 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:21:34" (1/3) ... [2023-11-29 00:21:35,204 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ab39d98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:21:35, skipping insertion in model container [2023-11-29 00:21:35,204 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:34" (2/3) ... [2023-11-29 00:21:35,205 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ab39d98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:21:35, skipping insertion in model container [2023-11-29 00:21:35,205 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:21:35" (3/3) ... [2023-11-29 00:21:35,206 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_variablewrapping_wrapper-s_file-12.i [2023-11-29 00:21:35,226 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:21:35,226 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 00:21:35,284 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:21:35,289 INFO L357 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, mHoare=true, 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;@3d30e66, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:21:35,289 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 00:21:35,293 INFO L276 IsEmpty]: Start isEmpty. Operand has 91 states, 72 states have (on average 1.4305555555555556) internal successors, (103), 73 states have internal predecessors, (103), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-29 00:21:35,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-29 00:21:35,314 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:21:35,315 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 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, 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] [2023-11-29 00:21:35,315 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:21:35,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:21:35,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1024814149, now seen corresponding path program 1 times [2023-11-29 00:21:35,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:21:35,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75742284] [2023-11-29 00:21:35,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:35,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:21:35,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:21:35,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:21:35,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75742284] [2023-11-29 00:21:35,505 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 00:21:35,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388247896] [2023-11-29 00:21:35,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:35,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:35,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:35,514 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:21:35,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:21:35,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:21:35,701 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 00:21:35,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:21:35,752 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2023-11-29 00:21:35,753 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:21:35,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388247896] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:21:35,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:21:35,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:21:35,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809561781] [2023-11-29 00:21:35,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:21:35,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 00:21:35,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:21:35,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 00:21:35,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:21:35,793 INFO L87 Difference]: Start difference. First operand has 91 states, 72 states have (on average 1.4305555555555556) internal successors, (103), 73 states have internal predecessors, (103), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-29 00:21:35,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:21:35,829 INFO L93 Difference]: Finished difference Result 173 states and 274 transitions. [2023-11-29 00:21:35,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 00:21:35,832 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 112 [2023-11-29 00:21:35,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:21:35,840 INFO L225 Difference]: With dead ends: 173 [2023-11-29 00:21:35,840 INFO L226 Difference]: Without dead ends: 83 [2023-11-29 00:21:35,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:21:35,847 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:21:35,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 114 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:21:35,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-29 00:21:35,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-11-29 00:21:35,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 65 states have (on average 1.323076923076923) internal successors, (86), 65 states have internal predecessors, (86), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-29 00:21:35,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 118 transitions. [2023-11-29 00:21:35,886 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 118 transitions. Word has length 112 [2023-11-29 00:21:35,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:21:35,887 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 118 transitions. [2023-11-29 00:21:35,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-29 00:21:35,887 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 118 transitions. [2023-11-29 00:21:35,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-29 00:21:35,890 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:21:35,890 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 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, 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] [2023-11-29 00:21:35,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:21:36,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:36,091 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:21:36,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:21:36,092 INFO L85 PathProgramCache]: Analyzing trace with hash -679294053, now seen corresponding path program 1 times [2023-11-29 00:21:36,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:21:36,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464565686] [2023-11-29 00:21:36,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:36,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:21:36,156 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:21:36,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1720489198] [2023-11-29 00:21:36,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:36,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:36,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:36,158 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:21:36,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:21:36,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:21:36,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:21:36,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:21:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-29 00:21:36,391 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:21:36,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:21:36,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464565686] [2023-11-29 00:21:36,392 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:21:36,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720489198] [2023-11-29 00:21:36,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720489198] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:21:36,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:21:36,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:21:36,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939938109] [2023-11-29 00:21:36,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:21:36,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:21:36,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:21:36,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:21:36,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:21:36,395 INFO L87 Difference]: Start difference. First operand 83 states and 118 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:21:36,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:21:36,441 INFO L93 Difference]: Finished difference Result 165 states and 235 transitions. [2023-11-29 00:21:36,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:21:36,442 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 112 [2023-11-29 00:21:36,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:21:36,444 INFO L225 Difference]: With dead ends: 165 [2023-11-29 00:21:36,444 INFO L226 Difference]: Without dead ends: 83 [2023-11-29 00:21:36,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:21:36,447 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 45 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:21:36,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 286 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:21:36,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-29 00:21:36,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-11-29 00:21:36,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 65 states have (on average 1.3076923076923077) internal successors, (85), 65 states have internal predecessors, (85), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-29 00:21:36,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 117 transitions. [2023-11-29 00:21:36,459 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 117 transitions. Word has length 112 [2023-11-29 00:21:36,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:21:36,461 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 117 transitions. [2023-11-29 00:21:36,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:21:36,461 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 117 transitions. [2023-11-29 00:21:36,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-11-29 00:21:36,464 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:21:36,464 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 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, 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, 1, 1] [2023-11-29 00:21:36,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 00:21:36,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-29 00:21:36,668 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:21:36,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:21:36,668 INFO L85 PathProgramCache]: Analyzing trace with hash -462281763, now seen corresponding path program 1 times [2023-11-29 00:21:36,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:21:36,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971092495] [2023-11-29 00:21:36,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:36,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:21:36,725 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:21:36,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [807327408] [2023-11-29 00:21:36,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:36,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:36,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:36,727 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:21:36,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:21:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:21:36,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:21:36,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:21:36,928 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-29 00:21:36,928 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:21:36,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:21:36,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971092495] [2023-11-29 00:21:36,929 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:21:36,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807327408] [2023-11-29 00:21:36,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807327408] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:21:36,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:21:36,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:21:36,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084312298] [2023-11-29 00:21:36,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:21:36,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:21:36,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:21:36,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:21:36,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:21:36,933 INFO L87 Difference]: Start difference. First operand 83 states and 117 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:21:36,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:21:36,991 INFO L93 Difference]: Finished difference Result 177 states and 250 transitions. [2023-11-29 00:21:36,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:21:36,992 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 114 [2023-11-29 00:21:36,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:21:36,994 INFO L225 Difference]: With dead ends: 177 [2023-11-29 00:21:36,994 INFO L226 Difference]: Without dead ends: 95 [2023-11-29 00:21:36,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:21:36,996 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 65 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:21:36,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 410 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:21:36,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-29 00:21:37,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 86. [2023-11-29 00:21:37,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 68 states have (on average 1.2941176470588236) internal successors, (88), 68 states have internal predecessors, (88), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-29 00:21:37,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 120 transitions. [2023-11-29 00:21:37,009 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 120 transitions. Word has length 114 [2023-11-29 00:21:37,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:21:37,010 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 120 transitions. [2023-11-29 00:21:37,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:21:37,011 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 120 transitions. [2023-11-29 00:21:37,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-29 00:21:37,013 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:21:37,014 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 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, 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, 1, 1, 1, 1] [2023-11-29 00:21:37,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 00:21:37,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:37,219 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:21:37,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:21:37,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1501942713, now seen corresponding path program 1 times [2023-11-29 00:21:37,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:21:37,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042514513] [2023-11-29 00:21:37,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:37,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:21:37,263 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:21:37,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1734070006] [2023-11-29 00:21:37,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:37,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:37,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:37,265 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:21:37,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:21:37,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:21:37,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 00:21:37,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:21:37,464 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:21:37,465 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 19 treesize of output 7 [2023-11-29 00:21:37,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2023-11-29 00:21:37,565 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:21:37,566 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 64 treesize of output 28 [2023-11-29 00:21:37,594 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-29 00:21:37,594 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:21:37,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:21:37,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042514513] [2023-11-29 00:21:37,595 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:21:37,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734070006] [2023-11-29 00:21:37,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734070006] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:21:37,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:21:37,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 00:21:37,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841894481] [2023-11-29 00:21:37,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:21:37,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 00:21:37,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:21:37,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 00:21:37,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:21:37,598 INFO L87 Difference]: Start difference. First operand 86 states and 120 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:21:38,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:21:38,042 INFO L93 Difference]: Finished difference Result 158 states and 215 transitions. [2023-11-29 00:21:38,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:21:38,042 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 116 [2023-11-29 00:21:38,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:21:38,045 INFO L225 Difference]: With dead ends: 158 [2023-11-29 00:21:38,045 INFO L226 Difference]: Without dead ends: 156 [2023-11-29 00:21:38,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:21:38,047 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 116 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:21:38,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 623 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:21:38,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-11-29 00:21:38,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 152. [2023-11-29 00:21:38,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 119 states have (on average 1.2605042016806722) internal successors, (150), 120 states have internal predecessors, (150), 30 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-29 00:21:38,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 210 transitions. [2023-11-29 00:21:38,068 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 210 transitions. Word has length 116 [2023-11-29 00:21:38,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:21:38,069 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 210 transitions. [2023-11-29 00:21:38,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:21:38,069 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 210 transitions. [2023-11-29 00:21:38,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-29 00:21:38,071 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:21:38,072 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 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, 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, 1, 1, 1, 1, 1] [2023-11-29 00:21:38,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 00:21:38,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:38,276 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:21:38,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:21:38,276 INFO L85 PathProgramCache]: Analyzing trace with hash 656669104, now seen corresponding path program 1 times [2023-11-29 00:21:38,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:21:38,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296206063] [2023-11-29 00:21:38,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:38,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:21:38,316 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:21:38,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1040837405] [2023-11-29 00:21:38,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:38,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:38,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:38,318 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:21:38,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:21:38,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:21:38,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 63 conjunts are in the unsatisfiable core [2023-11-29 00:21:38,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:21:38,488 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:21:38,489 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 19 treesize of output 7 [2023-11-29 00:21:38,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-11-29 00:21:38,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-11-29 00:21:38,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-11-29 00:21:38,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-11-29 00:21:38,999 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:21:39,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 38 [2023-11-29 00:21:39,234 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:21:39,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 34 [2023-11-29 00:21:39,305 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 312 proven. 36 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-11-29 00:21:39,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:21:40,305 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 114 proven. 48 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2023-11-29 00:21:40,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:21:40,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296206063] [2023-11-29 00:21:40,306 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:21:40,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040837405] [2023-11-29 00:21:40,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040837405] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:21:40,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:21:40,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 43 [2023-11-29 00:21:40,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156259931] [2023-11-29 00:21:40,307 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:21:40,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-29 00:21:40,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:21:40,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-29 00:21:40,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=1474, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 00:21:40,311 INFO L87 Difference]: Start difference. First operand 152 states and 210 transitions. Second operand has 43 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 40 states have internal predecessors, (90), 10 states have call successors, (26), 4 states have call predecessors, (26), 10 states have return successors, (26), 7 states have call predecessors, (26), 10 states have call successors, (26) [2023-11-29 00:21:43,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:21:43,330 INFO L93 Difference]: Finished difference Result 279 states and 349 transitions. [2023-11-29 00:21:43,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-29 00:21:43,330 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 40 states have internal predecessors, (90), 10 states have call successors, (26), 4 states have call predecessors, (26), 10 states have return successors, (26), 7 states have call predecessors, (26), 10 states have call successors, (26) Word has length 117 [2023-11-29 00:21:43,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:21:43,335 INFO L225 Difference]: With dead ends: 279 [2023-11-29 00:21:43,335 INFO L226 Difference]: Without dead ends: 277 [2023-11-29 00:21:43,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1855 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1358, Invalid=5782, Unknown=0, NotChecked=0, Total=7140 [2023-11-29 00:21:43,339 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 884 mSDsluCounter, 855 mSDsCounter, 0 mSdLazyCounter, 2540 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 900 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 2767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 2540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:21:43,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [900 Valid, 938 Invalid, 2767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 2540 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-29 00:21:43,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2023-11-29 00:21:43,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 180. [2023-11-29 00:21:43,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 140 states have (on average 1.2214285714285715) internal successors, (171), 141 states have internal predecessors, (171), 30 states have call successors, (30), 9 states have call predecessors, (30), 9 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-29 00:21:43,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 231 transitions. [2023-11-29 00:21:43,364 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 231 transitions. Word has length 117 [2023-11-29 00:21:43,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:21:43,365 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 231 transitions. [2023-11-29 00:21:43,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 40 states have internal predecessors, (90), 10 states have call successors, (26), 4 states have call predecessors, (26), 10 states have return successors, (26), 7 states have call predecessors, (26), 10 states have call successors, (26) [2023-11-29 00:21:43,365 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 231 transitions. [2023-11-29 00:21:43,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-29 00:21:43,367 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:21:43,367 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 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, 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, 1, 1, 1, 1, 1, 1] [2023-11-29 00:21:43,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 00:21:43,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:43,568 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:21:43,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:21:43,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1083558308, now seen corresponding path program 1 times [2023-11-29 00:21:43,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:21:43,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839536100] [2023-11-29 00:21:43,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:43,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:21:43,600 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:21:43,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1351849227] [2023-11-29 00:21:43,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:43,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:43,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:43,602 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:21:43,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:21:43,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:21:43,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 67 conjunts are in the unsatisfiable core [2023-11-29 00:21:43,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:21:43,764 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:21:43,765 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 19 treesize of output 7 [2023-11-29 00:21:43,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-11-29 00:21:43,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-11-29 00:21:43,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-11-29 00:21:43,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-11-29 00:21:44,219 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:21:44,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 38 [2023-11-29 00:21:44,486 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 312 proven. 36 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-11-29 00:21:44,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:21:45,304 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 114 proven. 48 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2023-11-29 00:21:45,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:21:45,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839536100] [2023-11-29 00:21:45,305 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:21:45,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351849227] [2023-11-29 00:21:45,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351849227] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:21:45,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:21:45,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 45 [2023-11-29 00:21:45,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370185876] [2023-11-29 00:21:45,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:21:45,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-29 00:21:45,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:21:45,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-29 00:21:45,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=1643, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 00:21:45,309 INFO L87 Difference]: Start difference. First operand 180 states and 231 transitions. Second operand has 45 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 42 states have internal predecessors, (92), 10 states have call successors, (26), 4 states have call predecessors, (26), 10 states have return successors, (26), 7 states have call predecessors, (26), 10 states have call successors, (26) [2023-11-29 00:21:47,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:21:47,393 INFO L93 Difference]: Finished difference Result 257 states and 323 transitions. [2023-11-29 00:21:47,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-29 00:21:47,394 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 42 states have internal predecessors, (92), 10 states have call successors, (26), 4 states have call predecessors, (26), 10 states have return successors, (26), 7 states have call predecessors, (26), 10 states have call successors, (26) Word has length 118 [2023-11-29 00:21:47,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:21:47,396 INFO L225 Difference]: With dead ends: 257 [2023-11-29 00:21:47,396 INFO L226 Difference]: Without dead ends: 255 [2023-11-29 00:21:47,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 191 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1218, Invalid=4788, Unknown=0, NotChecked=0, Total=6006 [2023-11-29 00:21:47,400 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 1477 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 1788 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1493 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 2065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 1788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:21:47,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1493 Valid, 599 Invalid, 2065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 1788 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 00:21:47,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2023-11-29 00:21:47,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 181. [2023-11-29 00:21:47,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 141 states have (on average 1.2198581560283688) internal successors, (172), 142 states have internal predecessors, (172), 30 states have call successors, (30), 9 states have call predecessors, (30), 9 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-29 00:21:47,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 232 transitions. [2023-11-29 00:21:47,418 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 232 transitions. Word has length 118 [2023-11-29 00:21:47,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:21:47,418 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 232 transitions. [2023-11-29 00:21:47,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 42 states have internal predecessors, (92), 10 states have call successors, (26), 4 states have call predecessors, (26), 10 states have return successors, (26), 7 states have call predecessors, (26), 10 states have call successors, (26) [2023-11-29 00:21:47,419 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 232 transitions. [2023-11-29 00:21:47,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-11-29 00:21:47,420 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:21:47,420 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 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, 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:21:47,425 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 00:21:47,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:47,621 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:21:47,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:21:47,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1707641387, now seen corresponding path program 1 times [2023-11-29 00:21:47,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:21:47,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510036465] [2023-11-29 00:21:47,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:47,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:21:47,649 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:21:47,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [20992796] [2023-11-29 00:21:47,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:47,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:47,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:47,651 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:21:47,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:21:47,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:21:47,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 00:21:47,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:21:47,828 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:21:47,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 10 [2023-11-29 00:21:47,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-11-29 00:21:47,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-11-29 00:21:47,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-11-29 00:21:47,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-11-29 00:21:47,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-11-29 00:21:48,006 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 41 treesize of output 23 [2023-11-29 00:21:48,022 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 225 proven. 30 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2023-11-29 00:21:48,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:21:48,217 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-11-29 00:21:48,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:21:48,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510036465] [2023-11-29 00:21:48,217 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:21:48,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20992796] [2023-11-29 00:21:48,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20992796] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:21:48,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:21:48,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2023-11-29 00:21:48,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910586822] [2023-11-29 00:21:48,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:21:48,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:21:48,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:21:48,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:21:48,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:21:48,220 INFO L87 Difference]: Start difference. First operand 181 states and 232 transitions. Second operand has 10 states, 8 states have (on average 6.5) internal successors, (52), 10 states have internal predecessors, (52), 4 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (27), 2 states have call predecessors, (27), 4 states have call successors, (27) [2023-11-29 00:21:48,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:21:48,530 INFO L93 Difference]: Finished difference Result 377 states and 477 transitions. [2023-11-29 00:21:48,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 00:21:48,530 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 6.5) internal successors, (52), 10 states have internal predecessors, (52), 4 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (27), 2 states have call predecessors, (27), 4 states have call successors, (27) Word has length 119 [2023-11-29 00:21:48,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:21:48,532 INFO L225 Difference]: With dead ends: 377 [2023-11-29 00:21:48,532 INFO L226 Difference]: Without dead ends: 197 [2023-11-29 00:21:48,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 222 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2023-11-29 00:21:48,533 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 187 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:21:48,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 166 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:21:48,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-11-29 00:21:48,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 189. [2023-11-29 00:21:48,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 147 states have (on average 1.2040816326530612) internal successors, (177), 148 states have internal predecessors, (177), 30 states have call successors, (30), 11 states have call predecessors, (30), 11 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-29 00:21:48,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 237 transitions. [2023-11-29 00:21:48,546 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 237 transitions. Word has length 119 [2023-11-29 00:21:48,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:21:48,546 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 237 transitions. [2023-11-29 00:21:48,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 6.5) internal successors, (52), 10 states have internal predecessors, (52), 4 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (27), 2 states have call predecessors, (27), 4 states have call successors, (27) [2023-11-29 00:21:48,547 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 237 transitions. [2023-11-29 00:21:48,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-11-29 00:21:48,548 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:21:48,549 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 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, 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:21:48,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 00:21:48,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:48,752 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:21:48,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:21:48,752 INFO L85 PathProgramCache]: Analyzing trace with hash -939628005, now seen corresponding path program 1 times [2023-11-29 00:21:48,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:21:48,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237098115] [2023-11-29 00:21:48,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:48,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:21:48,777 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:21:48,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1525417433] [2023-11-29 00:21:48,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:48,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:48,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:48,779 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:21:48,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:21:48,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:21:48,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:21:48,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:21:48,972 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:21:48,972 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 38 treesize of output 14 [2023-11-29 00:21:48,980 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-29 00:21:48,981 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:21:48,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:21:48,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237098115] [2023-11-29 00:21:48,981 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:21:48,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525417433] [2023-11-29 00:21:48,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525417433] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:21:48,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:21:48,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:21:48,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622083572] [2023-11-29 00:21:48,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:21:48,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:21:48,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:21:48,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:21:48,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:21:48,983 INFO L87 Difference]: Start difference. First operand 189 states and 237 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:21:49,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:21:49,308 INFO L93 Difference]: Finished difference Result 586 states and 737 transitions. [2023-11-29 00:21:49,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:21:49,308 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 119 [2023-11-29 00:21:49,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:21:49,311 INFO L225 Difference]: With dead ends: 586 [2023-11-29 00:21:49,311 INFO L226 Difference]: Without dead ends: 398 [2023-11-29 00:21:49,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:21:49,313 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 180 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:21:49,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 324 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:21:49,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2023-11-29 00:21:49,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 313. [2023-11-29 00:21:49,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 241 states have (on average 1.1908713692946058) internal successors, (287), 244 states have internal predecessors, (287), 50 states have call successors, (50), 21 states have call predecessors, (50), 21 states have return successors, (50), 47 states have call predecessors, (50), 50 states have call successors, (50) [2023-11-29 00:21:49,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 387 transitions. [2023-11-29 00:21:49,341 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 387 transitions. Word has length 119 [2023-11-29 00:21:49,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:21:49,342 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 387 transitions. [2023-11-29 00:21:49,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:21:49,342 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 387 transitions. [2023-11-29 00:21:49,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-11-29 00:21:49,343 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:21:49,344 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 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, 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:21:49,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 00:21:49,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:49,548 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:21:49,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:21:49,548 INFO L85 PathProgramCache]: Analyzing trace with hash -259569635, now seen corresponding path program 1 times [2023-11-29 00:21:49,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:21:49,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541459583] [2023-11-29 00:21:49,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:49,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:21:49,571 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:21:49,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [796376000] [2023-11-29 00:21:49,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:49,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:49,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:49,573 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:21:49,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 00:21:49,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:21:49,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 00:21:49,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:21:49,728 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:21:49,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 22 [2023-11-29 00:21:49,743 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:21:49,743 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 34 treesize of output 10 [2023-11-29 00:21:49,750 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-29 00:21:49,750 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:21:49,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:21:49,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541459583] [2023-11-29 00:21:49,750 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:21:49,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796376000] [2023-11-29 00:21:49,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796376000] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:21:49,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:21:49,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:21:49,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754354999] [2023-11-29 00:21:49,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:21:49,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:21:49,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:21:49,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:21:49,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:21:49,753 INFO L87 Difference]: Start difference. First operand 313 states and 387 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:21:49,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:21:49,940 INFO L93 Difference]: Finished difference Result 703 states and 873 transitions. [2023-11-29 00:21:49,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:21:49,940 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 119 [2023-11-29 00:21:49,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:21:49,944 INFO L225 Difference]: With dead ends: 703 [2023-11-29 00:21:49,944 INFO L226 Difference]: Without dead ends: 391 [2023-11-29 00:21:49,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:21:49,946 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 59 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:21:49,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 305 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:21:49,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2023-11-29 00:21:49,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 334. [2023-11-29 00:21:49,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 262 states have (on average 1.1870229007633588) internal successors, (311), 265 states have internal predecessors, (311), 50 states have call successors, (50), 21 states have call predecessors, (50), 21 states have return successors, (50), 47 states have call predecessors, (50), 50 states have call successors, (50) [2023-11-29 00:21:49,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 411 transitions. [2023-11-29 00:21:49,978 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 411 transitions. Word has length 119 [2023-11-29 00:21:49,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:21:49,978 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 411 transitions. [2023-11-29 00:21:49,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:21:49,979 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 411 transitions. [2023-11-29 00:21:49,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-11-29 00:21:49,981 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:21:49,982 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:21:49,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 00:21:50,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 00:21:50,182 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:21:50,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:21:50,183 INFO L85 PathProgramCache]: Analyzing trace with hash -919254103, now seen corresponding path program 1 times [2023-11-29 00:21:50,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:21:50,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948162938] [2023-11-29 00:21:50,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:50,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:21:50,205 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:21:50,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1869864830] [2023-11-29 00:21:50,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:50,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:50,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:50,207 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:21:50,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 00:21:50,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:21:50,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 00:21:50,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:21:50,372 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:21:50,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 10 [2023-11-29 00:21:50,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-11-29 00:21:50,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-11-29 00:21:50,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-11-29 00:21:50,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-11-29 00:21:50,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-11-29 00:21:50,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-11-29 00:21:50,535 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 41 treesize of output 23 [2023-11-29 00:21:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 225 proven. 30 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2023-11-29 00:21:50,543 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:21:50,746 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-11-29 00:21:50,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:21:50,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948162938] [2023-11-29 00:21:50,746 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:21:50,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869864830] [2023-11-29 00:21:50,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869864830] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:21:50,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:21:50,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2023-11-29 00:21:50,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390549186] [2023-11-29 00:21:50,747 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:21:50,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:21:50,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:21:50,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:21:50,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:21:50,749 INFO L87 Difference]: Start difference. First operand 334 states and 411 transitions. Second operand has 10 states, 8 states have (on average 6.625) internal successors, (53), 10 states have internal predecessors, (53), 4 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (27), 2 states have call predecessors, (27), 4 states have call successors, (27) [2023-11-29 00:21:51,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:21:51,078 INFO L93 Difference]: Finished difference Result 679 states and 833 transitions. [2023-11-29 00:21:51,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 00:21:51,079 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 6.625) internal successors, (53), 10 states have internal predecessors, (53), 4 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (27), 2 states have call predecessors, (27), 4 states have call successors, (27) Word has length 120 [2023-11-29 00:21:51,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:21:51,081 INFO L225 Difference]: With dead ends: 679 [2023-11-29 00:21:51,081 INFO L226 Difference]: Without dead ends: 346 [2023-11-29 00:21:51,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 223 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2023-11-29 00:21:51,083 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 201 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:21:51,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 160 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:21:51,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2023-11-29 00:21:51,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 334. [2023-11-29 00:21:51,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 262 states have (on average 1.1717557251908397) internal successors, (307), 265 states have internal predecessors, (307), 50 states have call successors, (50), 21 states have call predecessors, (50), 21 states have return successors, (50), 47 states have call predecessors, (50), 50 states have call successors, (50) [2023-11-29 00:21:51,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 407 transitions. [2023-11-29 00:21:51,105 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 407 transitions. Word has length 120 [2023-11-29 00:21:51,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:21:51,105 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 407 transitions. [2023-11-29 00:21:51,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 6.625) internal successors, (53), 10 states have internal predecessors, (53), 4 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (27), 2 states have call predecessors, (27), 4 states have call successors, (27) [2023-11-29 00:21:51,106 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 407 transitions. [2023-11-29 00:21:51,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-29 00:21:51,107 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:21:51,107 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:21:51,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 00:21:51,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 00:21:51,307 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:21:51,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:21:51,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1252203653, now seen corresponding path program 1 times [2023-11-29 00:21:51,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:21:51,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726422418] [2023-11-29 00:21:51,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:51,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:21:51,331 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:21:51,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1844677961] [2023-11-29 00:21:51,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:51,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:51,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:51,332 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:21:51,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 00:21:51,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:21:51,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 74 conjunts are in the unsatisfiable core [2023-11-29 00:21:51,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:21:51,658 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:21:51,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 103 treesize of output 102 [2023-11-29 00:21:51,926 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:21:51,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 92 treesize of output 88 [2023-11-29 00:21:52,116 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:21:52,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 83 treesize of output 76 [2023-11-29 00:21:52,302 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:21:52,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 74 treesize of output 64 [2023-11-29 00:21:52,462 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:21:52,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 65 treesize of output 52 [2023-11-29 00:21:52,574 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:21:52,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 40 [2023-11-29 00:21:52,659 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:21:52,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 28 [2023-11-29 00:21:52,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2023-11-29 00:21:53,062 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:21:53,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 65 treesize of output 67 [2023-11-29 00:21:53,168 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:21:53,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 88 treesize of output 34 [2023-11-29 00:21:53,206 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 1 proven. 451 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-29 00:21:53,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:21:53,460 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-29 00:21:53,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:21:53,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726422418] [2023-11-29 00:21:53,460 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:21:53,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844677961] [2023-11-29 00:21:53,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844677961] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:21:53,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:21:53,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [19] total 23 [2023-11-29 00:21:53,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275464419] [2023-11-29 00:21:53,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:21:53,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:21:53,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:21:53,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:21:53,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2023-11-29 00:21:53,462 INFO L87 Difference]: Start difference. First operand 334 states and 407 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:21:54,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:21:54,520 INFO L93 Difference]: Finished difference Result 871 states and 1047 transitions. [2023-11-29 00:21:54,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:21:54,521 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 121 [2023-11-29 00:21:54,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:21:54,524 INFO L225 Difference]: With dead ends: 871 [2023-11-29 00:21:54,524 INFO L226 Difference]: Without dead ends: 538 [2023-11-29 00:21:54,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-11-29 00:21:54,526 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 68 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:21:54,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 392 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 00:21:54,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2023-11-29 00:21:54,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 310. [2023-11-29 00:21:54,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 252 states have (on average 1.1785714285714286) internal successors, (297), 254 states have internal predecessors, (297), 40 states have call successors, (40), 17 states have call predecessors, (40), 17 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 00:21:54,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 377 transitions. [2023-11-29 00:21:54,564 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 377 transitions. Word has length 121 [2023-11-29 00:21:54,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:21:54,564 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 377 transitions. [2023-11-29 00:21:54,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:21:54,565 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 377 transitions. [2023-11-29 00:21:54,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-29 00:21:54,566 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:21:54,566 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:21:54,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-29 00:21:54,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 00:21:54,766 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:21:54,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:21:54,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1150741393, now seen corresponding path program 1 times [2023-11-29 00:21:54,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:21:54,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455924414] [2023-11-29 00:21:54,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:54,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:21:54,788 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:21:54,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1335234930] [2023-11-29 00:21:54,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:54,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:54,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:54,789 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:21:54,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 00:21:55,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:21:55,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-29 00:21:55,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:21:55,057 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:21:55,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 64 treesize of output 22 [2023-11-29 00:21:55,064 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 19 treesize of output 1 [2023-11-29 00:21:55,067 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 19 treesize of output 1 [2023-11-29 00:21:55,118 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:21:55,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 43 [2023-11-29 00:21:55,463 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:21:55,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 28 [2023-11-29 00:21:55,480 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-29 00:21:55,480 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:21:55,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:21:55,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455924414] [2023-11-29 00:21:55,480 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:21:55,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335234930] [2023-11-29 00:21:55,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335234930] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:21:55,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:21:55,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:21:55,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138747153] [2023-11-29 00:21:55,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:21:55,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:21:55,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:21:55,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:21:55,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:21:55,482 INFO L87 Difference]: Start difference. First operand 310 states and 377 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:21:56,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:21:56,763 INFO L93 Difference]: Finished difference Result 705 states and 846 transitions. [2023-11-29 00:21:56,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:21:56,764 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 122 [2023-11-29 00:21:56,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:21:56,766 INFO L225 Difference]: With dead ends: 705 [2023-11-29 00:21:56,766 INFO L226 Difference]: Without dead ends: 396 [2023-11-29 00:21:56,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:21:56,768 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 52 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:21:56,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 273 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 00:21:56,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2023-11-29 00:21:56,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 252. [2023-11-29 00:21:56,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 208 states have (on average 1.1826923076923077) internal successors, (246), 209 states have internal predecessors, (246), 30 states have call successors, (30), 13 states have call predecessors, (30), 13 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-29 00:21:56,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 306 transitions. [2023-11-29 00:21:56,800 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 306 transitions. Word has length 122 [2023-11-29 00:21:56,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:21:56,801 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 306 transitions. [2023-11-29 00:21:56,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:21:56,801 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 306 transitions. [2023-11-29 00:21:56,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-29 00:21:56,802 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:21:56,803 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:21:56,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 00:21:57,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 00:21:57,003 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:21:57,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:21:57,004 INFO L85 PathProgramCache]: Analyzing trace with hash 48754918, now seen corresponding path program 1 times [2023-11-29 00:21:57,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:21:57,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571100815] [2023-11-29 00:21:57,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:57,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:21:57,022 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:21:57,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [442424107] [2023-11-29 00:21:57,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:57,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:57,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:57,024 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:21:57,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 00:21:57,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:21:57,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-29 00:21:57,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:21:57,486 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:21:57,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 49 [2023-11-29 00:21:57,567 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:21:57,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 49 [2023-11-29 00:21:57,659 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:21:57,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 49 [2023-11-29 00:21:57,760 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:21:57,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 40 [2023-11-29 00:21:57,840 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:21:57,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 37 [2023-11-29 00:21:57,903 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:21:57,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 28 [2023-11-29 00:21:57,950 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:21:57,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 25 [2023-11-29 00:21:57,992 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:21:57,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 16 [2023-11-29 00:21:58,046 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 368 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-11-29 00:21:58,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:21:58,545 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-29 00:21:58,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:21:58,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571100815] [2023-11-29 00:21:58,545 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:21:58,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442424107] [2023-11-29 00:21:58,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442424107] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:21:58,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:21:58,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2023-11-29 00:21:58,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533025844] [2023-11-29 00:21:58,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:21:58,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:21:58,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:21:58,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:21:58,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:21:58,548 INFO L87 Difference]: Start difference. First operand 252 states and 306 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:03,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:03,167 INFO L93 Difference]: Finished difference Result 556 states and 669 transitions. [2023-11-29 00:22:03,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:22:03,168 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 123 [2023-11-29 00:22:03,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:03,170 INFO L225 Difference]: With dead ends: 556 [2023-11-29 00:22:03,170 INFO L226 Difference]: Without dead ends: 305 [2023-11-29 00:22:03,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:22:03,171 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 72 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:03,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 461 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-29 00:22:03,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2023-11-29 00:22:03,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 300. [2023-11-29 00:22:03,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 238 states have (on average 1.1554621848739495) internal successors, (275), 240 states have internal predecessors, (275), 42 states have call successors, (42), 19 states have call predecessors, (42), 19 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-29 00:22:03,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 359 transitions. [2023-11-29 00:22:03,197 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 359 transitions. Word has length 123 [2023-11-29 00:22:03,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:03,198 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 359 transitions. [2023-11-29 00:22:03,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:03,198 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 359 transitions. [2023-11-29 00:22:03,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-29 00:22:03,199 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:03,199 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:03,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 00:22:03,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 00:22:03,400 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:22:03,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:03,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1422219994, now seen corresponding path program 1 times [2023-11-29 00:22:03,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:03,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492014684] [2023-11-29 00:22:03,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:03,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:03,421 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:22:03,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1363825834] [2023-11-29 00:22:03,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:03,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:03,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:03,422 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:03,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 00:22:03,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:03,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 00:22:03,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:03,672 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:03,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 10 [2023-11-29 00:22:03,697 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:03,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 52 [2023-11-29 00:22:03,777 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:03,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 31 [2023-11-29 00:22:04,064 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-29 00:22:04,064 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:22:04,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:04,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492014684] [2023-11-29 00:22:04,064 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:22:04,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363825834] [2023-11-29 00:22:04,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363825834] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:22:04,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:22:04,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 00:22:04,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704828127] [2023-11-29 00:22:04,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:04,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:22:04,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:04,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:22:04,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:22:04,066 INFO L87 Difference]: Start difference. First operand 300 states and 359 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:06,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:06,303 INFO L93 Difference]: Finished difference Result 578 states and 692 transitions. [2023-11-29 00:22:06,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:22:06,304 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 123 [2023-11-29 00:22:06,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:06,306 INFO L225 Difference]: With dead ends: 578 [2023-11-29 00:22:06,306 INFO L226 Difference]: Without dead ends: 323 [2023-11-29 00:22:06,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:22:06,307 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 51 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:06,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 394 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-29 00:22:06,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2023-11-29 00:22:06,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 294. [2023-11-29 00:22:06,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 232 states have (on average 1.1508620689655173) internal successors, (267), 234 states have internal predecessors, (267), 42 states have call successors, (42), 19 states have call predecessors, (42), 19 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-29 00:22:06,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 351 transitions. [2023-11-29 00:22:06,333 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 351 transitions. Word has length 123 [2023-11-29 00:22:06,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:06,334 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 351 transitions. [2023-11-29 00:22:06,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:06,334 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 351 transitions. [2023-11-29 00:22:06,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-29 00:22:06,335 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:06,335 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:06,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 00:22:06,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 00:22:06,535 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:22:06,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:06,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1404100338, now seen corresponding path program 1 times [2023-11-29 00:22:06,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:06,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888014127] [2023-11-29 00:22:06,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:06,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:06,556 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:22:06,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [16438188] [2023-11-29 00:22:06,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:06,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:06,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:06,558 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:06,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 00:22:06,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:06,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 00:22:06,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:06,767 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:06,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 28 [2023-11-29 00:22:06,778 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:06,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 28 [2023-11-29 00:22:06,810 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:06,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 16 [2023-11-29 00:22:06,818 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-29 00:22:06,818 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:22:06,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:06,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888014127] [2023-11-29 00:22:06,818 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:22:06,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16438188] [2023-11-29 00:22:06,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16438188] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:22:06,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:22:06,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:22:06,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519074586] [2023-11-29 00:22:06,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:06,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:22:06,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:06,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:22:06,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:22:06,820 INFO L87 Difference]: Start difference. First operand 294 states and 351 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:07,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:07,325 INFO L93 Difference]: Finished difference Result 773 states and 924 transitions. [2023-11-29 00:22:07,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:22:07,325 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-11-29 00:22:07,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:07,328 INFO L225 Difference]: With dead ends: 773 [2023-11-29 00:22:07,328 INFO L226 Difference]: Without dead ends: 524 [2023-11-29 00:22:07,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:22:07,329 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 138 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:07,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 426 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:22:07,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2023-11-29 00:22:07,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 331. [2023-11-29 00:22:07,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 269 states have (on average 1.1635687732342008) internal successors, (313), 271 states have internal predecessors, (313), 42 states have call successors, (42), 19 states have call predecessors, (42), 19 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-29 00:22:07,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 397 transitions. [2023-11-29 00:22:07,360 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 397 transitions. Word has length 124 [2023-11-29 00:22:07,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:07,360 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 397 transitions. [2023-11-29 00:22:07,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:07,360 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 397 transitions. [2023-11-29 00:22:07,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-29 00:22:07,361 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:07,362 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:07,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-29 00:22:07,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 00:22:07,562 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:22:07,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:07,563 INFO L85 PathProgramCache]: Analyzing trace with hash 22977390, now seen corresponding path program 1 times [2023-11-29 00:22:07,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:07,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671946973] [2023-11-29 00:22:07,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:07,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:07,583 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:22:07,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1639245684] [2023-11-29 00:22:07,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:07,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:07,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:07,584 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:07,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 00:22:07,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:07,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 00:22:07,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:07,794 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:07,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-29 00:22:07,803 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:07,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-29 00:22:07,830 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:07,830 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 40 treesize of output 16 [2023-11-29 00:22:07,843 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-29 00:22:07,844 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:22:07,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:07,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671946973] [2023-11-29 00:22:07,844 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:22:07,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639245684] [2023-11-29 00:22:07,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639245684] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:22:07,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:22:07,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 00:22:07,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082264864] [2023-11-29 00:22:07,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:07,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:22:07,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:07,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:22:07,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:22:07,846 INFO L87 Difference]: Start difference. First operand 331 states and 397 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:08,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:08,680 INFO L93 Difference]: Finished difference Result 811 states and 966 transitions. [2023-11-29 00:22:08,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:22:08,681 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-11-29 00:22:08,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:08,683 INFO L225 Difference]: With dead ends: 811 [2023-11-29 00:22:08,683 INFO L226 Difference]: Without dead ends: 525 [2023-11-29 00:22:08,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:22:08,684 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 127 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:08,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 474 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 00:22:08,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2023-11-29 00:22:08,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 366. [2023-11-29 00:22:08,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 304 states have (on average 1.1644736842105263) internal successors, (354), 306 states have internal predecessors, (354), 42 states have call successors, (42), 19 states have call predecessors, (42), 19 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-29 00:22:08,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 438 transitions. [2023-11-29 00:22:08,716 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 438 transitions. Word has length 124 [2023-11-29 00:22:08,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:08,716 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 438 transitions. [2023-11-29 00:22:08,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:08,716 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 438 transitions. [2023-11-29 00:22:08,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-29 00:22:08,717 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:08,717 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:08,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-29 00:22:08,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 00:22:08,918 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:22:08,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:08,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1967525989, now seen corresponding path program 1 times [2023-11-29 00:22:08,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:08,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357971956] [2023-11-29 00:22:08,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:08,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:08,938 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:22:08,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1286229586] [2023-11-29 00:22:08,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:08,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:08,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:08,940 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:08,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 00:22:09,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:09,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-29 00:22:09,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:09,132 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:09,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 13 [2023-11-29 00:22:09,161 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:09,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 34 [2023-11-29 00:22:09,179 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:09,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 37 [2023-11-29 00:22:09,284 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:09,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 21 [2023-11-29 00:22:09,370 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-29 00:22:09,370 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:22:09,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:09,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357971956] [2023-11-29 00:22:09,370 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:22:09,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286229586] [2023-11-29 00:22:09,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286229586] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:22:09,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:22:09,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-11-29 00:22:09,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125948479] [2023-11-29 00:22:09,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:09,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 00:22:09,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:09,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 00:22:09,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-11-29 00:22:09,372 INFO L87 Difference]: Start difference. First operand 366 states and 438 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:10,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:10,788 INFO L93 Difference]: Finished difference Result 976 states and 1163 transitions. [2023-11-29 00:22:10,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 00:22:10,789 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-11-29 00:22:10,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:10,792 INFO L225 Difference]: With dead ends: 976 [2023-11-29 00:22:10,792 INFO L226 Difference]: Without dead ends: 655 [2023-11-29 00:22:10,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2023-11-29 00:22:10,794 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 334 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 1161 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:10,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 1161 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 00:22:10,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2023-11-29 00:22:10,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 450. [2023-11-29 00:22:10,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 388 states have (on average 1.190721649484536) internal successors, (462), 390 states have internal predecessors, (462), 42 states have call successors, (42), 19 states have call predecessors, (42), 19 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-29 00:22:10,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 546 transitions. [2023-11-29 00:22:10,836 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 546 transitions. Word has length 124 [2023-11-29 00:22:10,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:10,836 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 546 transitions. [2023-11-29 00:22:10,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:10,837 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 546 transitions. [2023-11-29 00:22:10,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-29 00:22:10,838 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:10,838 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:10,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 00:22:11,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 00:22:11,039 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:22:11,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:11,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1647382937, now seen corresponding path program 1 times [2023-11-29 00:22:11,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:11,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641513729] [2023-11-29 00:22:11,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:11,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:11,064 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:22:11,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1873594411] [2023-11-29 00:22:11,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:11,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:11,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:11,066 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:11,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 00:22:11,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:11,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:22:11,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:11,271 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:11,271 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 40 treesize of output 16 [2023-11-29 00:22:11,279 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-29 00:22:11,279 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:22:11,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:11,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641513729] [2023-11-29 00:22:11,279 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:22:11,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873594411] [2023-11-29 00:22:11,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873594411] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:22:11,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:22:11,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:22:11,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833392237] [2023-11-29 00:22:11,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:11,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:22:11,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:11,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:22:11,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:22:11,281 INFO L87 Difference]: Start difference. First operand 450 states and 546 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:12,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:12,062 INFO L93 Difference]: Finished difference Result 1082 states and 1297 transitions. [2023-11-29 00:22:12,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:22:12,062 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-11-29 00:22:12,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:12,065 INFO L225 Difference]: With dead ends: 1082 [2023-11-29 00:22:12,065 INFO L226 Difference]: Without dead ends: 677 [2023-11-29 00:22:12,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:22:12,066 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 173 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:12,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 404 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 00:22:12,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2023-11-29 00:22:12,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 456. [2023-11-29 00:22:12,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 394 states have (on average 1.1878172588832487) internal successors, (468), 396 states have internal predecessors, (468), 42 states have call successors, (42), 19 states have call predecessors, (42), 19 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-29 00:22:12,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 552 transitions. [2023-11-29 00:22:12,100 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 552 transitions. Word has length 124 [2023-11-29 00:22:12,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:12,100 INFO L495 AbstractCegarLoop]: Abstraction has 456 states and 552 transitions. [2023-11-29 00:22:12,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:12,100 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 552 transitions. [2023-11-29 00:22:12,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-29 00:22:12,101 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:12,101 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:12,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-29 00:22:12,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 00:22:12,302 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:22:12,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:12,302 INFO L85 PathProgramCache]: Analyzing trace with hash 162087655, now seen corresponding path program 1 times [2023-11-29 00:22:12,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:12,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326076097] [2023-11-29 00:22:12,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:12,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:12,321 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:22:12,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [43774712] [2023-11-29 00:22:12,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:12,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:12,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:12,322 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:12,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 00:22:12,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:12,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:22:12,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:12,552 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:12,552 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 40 treesize of output 16 [2023-11-29 00:22:12,561 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-29 00:22:12,562 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:22:12,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:12,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326076097] [2023-11-29 00:22:12,562 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:22:12,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43774712] [2023-11-29 00:22:12,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43774712] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:22:12,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:22:12,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:22:12,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519227629] [2023-11-29 00:22:12,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:12,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:22:12,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:12,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:22:12,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:22:12,564 INFO L87 Difference]: Start difference. First operand 456 states and 552 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:12,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:12,950 INFO L93 Difference]: Finished difference Result 981 states and 1181 transitions. [2023-11-29 00:22:12,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:22:12,951 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-11-29 00:22:12,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:12,953 INFO L225 Difference]: With dead ends: 981 [2023-11-29 00:22:12,953 INFO L226 Difference]: Without dead ends: 570 [2023-11-29 00:22:12,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:22:12,954 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 100 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:12,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 399 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:22:12,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2023-11-29 00:22:12,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 420. [2023-11-29 00:22:12,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 358 states have (on average 1.187150837988827) internal successors, (425), 360 states have internal predecessors, (425), 42 states have call successors, (42), 19 states have call predecessors, (42), 19 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-29 00:22:12,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 509 transitions. [2023-11-29 00:22:12,998 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 509 transitions. Word has length 124 [2023-11-29 00:22:12,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:12,999 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 509 transitions. [2023-11-29 00:22:12,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:12,999 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 509 transitions. [2023-11-29 00:22:13,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-29 00:22:13,000 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:13,001 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:13,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 00:22:13,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:13,201 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:22:13,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:13,202 INFO L85 PathProgramCache]: Analyzing trace with hash -824270153, now seen corresponding path program 1 times [2023-11-29 00:22:13,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:13,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819096930] [2023-11-29 00:22:13,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:13,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:13,225 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:22:13,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2011866890] [2023-11-29 00:22:13,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:13,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:13,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:13,226 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:13,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 00:22:13,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:13,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-29 00:22:13,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:13,436 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:13,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 34 [2023-11-29 00:22:13,457 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:13,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 37 [2023-11-29 00:22:13,589 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:13,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 21 [2023-11-29 00:22:13,682 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-29 00:22:13,682 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:22:13,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:13,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819096930] [2023-11-29 00:22:13,683 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:22:13,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011866890] [2023-11-29 00:22:13,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011866890] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:22:13,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:22:13,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-11-29 00:22:13,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373397336] [2023-11-29 00:22:13,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:13,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 00:22:13,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:13,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 00:22:13,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-11-29 00:22:13,684 INFO L87 Difference]: Start difference. First operand 420 states and 509 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:15,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:15,607 INFO L93 Difference]: Finished difference Result 1093 states and 1314 transitions. [2023-11-29 00:22:15,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 00:22:15,608 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-11-29 00:22:15,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:15,611 INFO L225 Difference]: With dead ends: 1093 [2023-11-29 00:22:15,611 INFO L226 Difference]: Without dead ends: 718 [2023-11-29 00:22:15,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2023-11-29 00:22:15,613 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 279 mSDsluCounter, 1148 mSDsCounter, 0 mSdLazyCounter, 1162 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 1286 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:15,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 1286 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1162 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-29 00:22:15,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2023-11-29 00:22:15,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 495. [2023-11-29 00:22:15,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 433 states have (on average 1.2032332563510393) internal successors, (521), 435 states have internal predecessors, (521), 42 states have call successors, (42), 19 states have call predecessors, (42), 19 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-29 00:22:15,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 605 transitions. [2023-11-29 00:22:15,649 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 605 transitions. Word has length 124 [2023-11-29 00:22:15,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:15,649 INFO L495 AbstractCegarLoop]: Abstraction has 495 states and 605 transitions. [2023-11-29 00:22:15,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:15,649 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 605 transitions. [2023-11-29 00:22:15,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-29 00:22:15,650 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:15,650 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:15,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 00:22:15,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:15,851 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:22:15,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:15,851 INFO L85 PathProgramCache]: Analyzing trace with hash -144211783, now seen corresponding path program 1 times [2023-11-29 00:22:15,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:15,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359729835] [2023-11-29 00:22:15,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:15,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:15,870 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:22:15,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1655349893] [2023-11-29 00:22:15,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:15,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:15,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:15,871 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:15,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 00:22:16,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:16,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:22:16,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:16,052 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:16,052 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 40 treesize of output 16 [2023-11-29 00:22:16,059 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-29 00:22:16,059 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:22:16,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:16,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359729835] [2023-11-29 00:22:16,060 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:22:16,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655349893] [2023-11-29 00:22:16,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655349893] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:22:16,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:22:16,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:22:16,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689218905] [2023-11-29 00:22:16,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:16,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:22:16,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:16,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:22:16,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:22:16,061 INFO L87 Difference]: Start difference. First operand 495 states and 605 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:16,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:16,546 INFO L93 Difference]: Finished difference Result 1147 states and 1380 transitions. [2023-11-29 00:22:16,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:22:16,547 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-11-29 00:22:16,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:16,551 INFO L225 Difference]: With dead ends: 1147 [2023-11-29 00:22:16,551 INFO L226 Difference]: Without dead ends: 697 [2023-11-29 00:22:16,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:22:16,552 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 120 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:16,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 404 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:22:16,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2023-11-29 00:22:16,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 495. [2023-11-29 00:22:16,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 433 states have (on average 1.1893764434180139) internal successors, (515), 435 states have internal predecessors, (515), 42 states have call successors, (42), 19 states have call predecessors, (42), 19 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-29 00:22:16,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 599 transitions. [2023-11-29 00:22:16,606 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 599 transitions. Word has length 124 [2023-11-29 00:22:16,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:16,607 INFO L495 AbstractCegarLoop]: Abstraction has 495 states and 599 transitions. [2023-11-29 00:22:16,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:16,607 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 599 transitions. [2023-11-29 00:22:16,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-29 00:22:16,608 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:16,609 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:16,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 00:22:16,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:16,809 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:22:16,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:16,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1120278446, now seen corresponding path program 1 times [2023-11-29 00:22:16,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:16,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467858878] [2023-11-29 00:22:16,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:16,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:16,833 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:22:16,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [852110564] [2023-11-29 00:22:16,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:16,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:16,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:16,834 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:16,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 00:22:17,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:17,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 00:22:17,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:17,080 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:17,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 28 [2023-11-29 00:22:17,089 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:17,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 28 [2023-11-29 00:22:17,123 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:17,123 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 42 treesize of output 18 [2023-11-29 00:22:17,141 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-29 00:22:17,141 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:22:17,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:17,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467858878] [2023-11-29 00:22:17,141 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:22:17,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852110564] [2023-11-29 00:22:17,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852110564] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:22:17,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:22:17,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 00:22:17,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024498042] [2023-11-29 00:22:17,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:17,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:22:17,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:17,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:22:17,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:22:17,143 INFO L87 Difference]: Start difference. First operand 495 states and 599 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:17,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:17,789 INFO L93 Difference]: Finished difference Result 1100 states and 1321 transitions. [2023-11-29 00:22:17,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 00:22:17,790 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-11-29 00:22:17,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:17,793 INFO L225 Difference]: With dead ends: 1100 [2023-11-29 00:22:17,793 INFO L226 Difference]: Without dead ends: 650 [2023-11-29 00:22:17,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:22:17,794 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 112 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:17,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 493 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:22:17,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2023-11-29 00:22:17,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 501. [2023-11-29 00:22:17,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 439 states have (on average 1.1867881548974943) internal successors, (521), 441 states have internal predecessors, (521), 42 states have call successors, (42), 19 states have call predecessors, (42), 19 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-29 00:22:17,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 605 transitions. [2023-11-29 00:22:17,845 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 605 transitions. Word has length 124 [2023-11-29 00:22:17,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:17,846 INFO L495 AbstractCegarLoop]: Abstraction has 501 states and 605 transitions. [2023-11-29 00:22:17,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:17,846 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 605 transitions. [2023-11-29 00:22:17,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-29 00:22:17,847 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:17,848 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:17,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-29 00:22:18,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:18,048 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:22:18,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:18,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1665258809, now seen corresponding path program 1 times [2023-11-29 00:22:18,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:18,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257670205] [2023-11-29 00:22:18,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:18,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:18,072 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:22:18,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1492730753] [2023-11-29 00:22:18,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:18,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:18,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:18,075 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:18,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 00:22:18,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:18,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:22:18,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:18,311 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:18,311 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 40 treesize of output 16 [2023-11-29 00:22:18,321 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-29 00:22:18,321 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:22:18,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:18,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257670205] [2023-11-29 00:22:18,321 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:22:18,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492730753] [2023-11-29 00:22:18,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492730753] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:22:18,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:22:18,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:22:18,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072517630] [2023-11-29 00:22:18,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:18,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:22:18,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:18,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:22:18,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:22:18,323 INFO L87 Difference]: Start difference. First operand 501 states and 605 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:18,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:18,771 INFO L93 Difference]: Finished difference Result 1048 states and 1254 transitions. [2023-11-29 00:22:18,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:22:18,771 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-11-29 00:22:18,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:18,773 INFO L225 Difference]: With dead ends: 1048 [2023-11-29 00:22:18,773 INFO L226 Difference]: Without dead ends: 592 [2023-11-29 00:22:18,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:22:18,774 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 96 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:18,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 407 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:22:18,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2023-11-29 00:22:18,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 465. [2023-11-29 00:22:18,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 403 states have (on average 1.186104218362283) internal successors, (478), 405 states have internal predecessors, (478), 42 states have call successors, (42), 19 states have call predecessors, (42), 19 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-29 00:22:18,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 562 transitions. [2023-11-29 00:22:18,825 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 562 transitions. Word has length 124 [2023-11-29 00:22:18,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:18,825 INFO L495 AbstractCegarLoop]: Abstraction has 465 states and 562 transitions. [2023-11-29 00:22:18,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:18,826 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 562 transitions. [2023-11-29 00:22:18,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-29 00:22:18,827 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:18,827 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:18,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-29 00:22:19,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:19,028 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:22:19,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:19,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1544648948, now seen corresponding path program 1 times [2023-11-29 00:22:19,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:19,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574401368] [2023-11-29 00:22:19,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:19,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:19,046 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:22:19,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [919857596] [2023-11-29 00:22:19,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:19,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:19,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:19,048 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:19,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 00:22:19,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:19,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:22:19,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:19,225 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:19,225 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 38 treesize of output 14 [2023-11-29 00:22:19,232 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-29 00:22:19,233 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:22:19,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:19,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574401368] [2023-11-29 00:22:19,233 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:22:19,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919857596] [2023-11-29 00:22:19,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919857596] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:22:19,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:22:19,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:22:19,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600657855] [2023-11-29 00:22:19,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:19,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:22:19,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:19,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:22:19,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:22:19,235 INFO L87 Difference]: Start difference. First operand 465 states and 562 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:19,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:19,642 INFO L93 Difference]: Finished difference Result 965 states and 1145 transitions. [2023-11-29 00:22:19,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:22:19,642 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-11-29 00:22:19,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:19,645 INFO L225 Difference]: With dead ends: 965 [2023-11-29 00:22:19,645 INFO L226 Difference]: Without dead ends: 545 [2023-11-29 00:22:19,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:22:19,645 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 93 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:19,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 329 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:22:19,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2023-11-29 00:22:19,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 423. [2023-11-29 00:22:19,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 361 states have (on average 1.1551246537396123) internal successors, (417), 363 states have internal predecessors, (417), 42 states have call successors, (42), 19 states have call predecessors, (42), 19 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-29 00:22:19,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 501 transitions. [2023-11-29 00:22:19,702 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 501 transitions. Word has length 124 [2023-11-29 00:22:19,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:19,703 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 501 transitions. [2023-11-29 00:22:19,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:19,703 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 501 transitions. [2023-11-29 00:22:19,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-29 00:22:19,704 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:19,705 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:19,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 00:22:19,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 00:22:19,905 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:22:19,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:19,906 INFO L85 PathProgramCache]: Analyzing trace with hash -260789386, now seen corresponding path program 1 times [2023-11-29 00:22:19,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:19,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294372452] [2023-11-29 00:22:19,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:19,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:19,923 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:22:19,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [424188312] [2023-11-29 00:22:19,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:19,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:19,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:19,926 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:19,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 00:22:20,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:20,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 00:22:20,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:20,122 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:20,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-29 00:22:20,130 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:20,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-29 00:22:20,158 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:20,158 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 40 treesize of output 16 [2023-11-29 00:22:20,170 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-29 00:22:20,170 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:22:20,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:20,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294372452] [2023-11-29 00:22:20,171 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:22:20,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424188312] [2023-11-29 00:22:20,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424188312] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:22:20,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:22:20,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 00:22:20,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807250821] [2023-11-29 00:22:20,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:20,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:22:20,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:20,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:22:20,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:22:20,173 INFO L87 Difference]: Start difference. First operand 423 states and 501 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:20,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:20,907 INFO L93 Difference]: Finished difference Result 1047 states and 1236 transitions. [2023-11-29 00:22:20,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:22:20,908 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-11-29 00:22:20,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:20,911 INFO L225 Difference]: With dead ends: 1047 [2023-11-29 00:22:20,911 INFO L226 Difference]: Without dead ends: 669 [2023-11-29 00:22:20,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:22:20,912 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 126 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:20,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 528 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 00:22:20,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2023-11-29 00:22:20,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 458. [2023-11-29 00:22:20,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 396 states have (on average 1.1641414141414141) internal successors, (461), 398 states have internal predecessors, (461), 42 states have call successors, (42), 19 states have call predecessors, (42), 19 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-29 00:22:20,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 545 transitions. [2023-11-29 00:22:20,951 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 545 transitions. Word has length 124 [2023-11-29 00:22:20,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:20,951 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 545 transitions. [2023-11-29 00:22:20,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:20,952 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 545 transitions. [2023-11-29 00:22:20,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-29 00:22:20,953 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:20,953 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:20,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-29 00:22:21,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 00:22:21,154 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:22:21,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:21,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1003700843, now seen corresponding path program 1 times [2023-11-29 00:22:21,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:21,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906303074] [2023-11-29 00:22:21,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:21,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:21,173 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:22:21,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1132839745] [2023-11-29 00:22:21,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:21,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:21,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:21,175 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:21,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 00:22:21,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:21,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:22:21,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:21,406 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:21,407 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 38 treesize of output 14 [2023-11-29 00:22:21,416 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-29 00:22:21,417 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:22:21,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:21,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906303074] [2023-11-29 00:22:21,417 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:22:21,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132839745] [2023-11-29 00:22:21,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132839745] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:22:21,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:22:21,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:22:21,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085600473] [2023-11-29 00:22:21,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:21,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:22:21,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:21,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:22:21,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:22:21,420 INFO L87 Difference]: Start difference. First operand 458 states and 545 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:22,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:22,021 INFO L93 Difference]: Finished difference Result 1046 states and 1233 transitions. [2023-11-29 00:22:22,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:22:22,022 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-11-29 00:22:22,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:22,025 INFO L225 Difference]: With dead ends: 1046 [2023-11-29 00:22:22,025 INFO L226 Difference]: Without dead ends: 633 [2023-11-29 00:22:22,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:22:22,026 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 117 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:22,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 326 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:22:22,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2023-11-29 00:22:22,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 458. [2023-11-29 00:22:22,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 396 states have (on average 1.1565656565656566) internal successors, (458), 398 states have internal predecessors, (458), 42 states have call successors, (42), 19 states have call predecessors, (42), 19 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-29 00:22:22,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 542 transitions. [2023-11-29 00:22:22,063 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 542 transitions. Word has length 124 [2023-11-29 00:22:22,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:22,064 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 542 transitions. [2023-11-29 00:22:22,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:22,064 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 542 transitions. [2023-11-29 00:22:22,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-29 00:22:22,065 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:22,065 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:22,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 00:22:22,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:22,265 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:22:22,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:22,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1683759213, now seen corresponding path program 1 times [2023-11-29 00:22:22,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:22,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934043299] [2023-11-29 00:22:22,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:22,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:22,283 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:22:22,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800812858] [2023-11-29 00:22:22,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:22,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:22,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:22,285 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:22,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 00:22:22,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:22,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 00:22:22,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:22,547 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:22,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 34 [2023-11-29 00:22:22,567 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:22,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 37 [2023-11-29 00:22:22,679 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:22,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 21 [2023-11-29 00:22:22,757 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-29 00:22:22,757 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:22:22,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:22,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934043299] [2023-11-29 00:22:22,757 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:22:22,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800812858] [2023-11-29 00:22:22,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800812858] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:22:22,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:22:22,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-11-29 00:22:22,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991829532] [2023-11-29 00:22:22,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:22,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 00:22:22,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:22,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 00:22:22,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-11-29 00:22:22,759 INFO L87 Difference]: Start difference. First operand 458 states and 542 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:24,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:24,717 INFO L93 Difference]: Finished difference Result 1096 states and 1283 transitions. [2023-11-29 00:22:24,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 00:22:24,718 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-11-29 00:22:24,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:24,722 INFO L225 Difference]: With dead ends: 1096 [2023-11-29 00:22:24,722 INFO L226 Difference]: Without dead ends: 683 [2023-11-29 00:22:24,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2023-11-29 00:22:24,723 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 273 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 1275 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:24,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 1275 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-29 00:22:24,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2023-11-29 00:22:24,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 461. [2023-11-29 00:22:24,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 399 states have (on average 1.155388471177945) internal successors, (461), 401 states have internal predecessors, (461), 42 states have call successors, (42), 19 states have call predecessors, (42), 19 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-29 00:22:24,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 545 transitions. [2023-11-29 00:22:24,785 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 545 transitions. Word has length 124 [2023-11-29 00:22:24,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:24,785 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 545 transitions. [2023-11-29 00:22:24,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:24,785 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 545 transitions. [2023-11-29 00:22:24,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-29 00:22:24,787 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:24,787 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:24,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 00:22:24,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:24,987 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:22:24,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:24,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1641912334, now seen corresponding path program 1 times [2023-11-29 00:22:24,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:24,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333164819] [2023-11-29 00:22:24,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:24,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:25,006 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:22:25,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1753505402] [2023-11-29 00:22:25,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:25,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:25,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:25,008 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:25,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 00:22:25,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:25,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 00:22:25,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:25,199 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:25,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-29 00:22:25,207 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:25,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-29 00:22:25,225 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:25,225 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 38 treesize of output 14 [2023-11-29 00:22:25,233 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-29 00:22:25,233 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:22:25,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:25,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333164819] [2023-11-29 00:22:25,234 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:22:25,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753505402] [2023-11-29 00:22:25,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753505402] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:22:25,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:22:25,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:22:25,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87363655] [2023-11-29 00:22:25,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:25,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:22:25,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:25,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:22:25,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:22:25,235 INFO L87 Difference]: Start difference. First operand 461 states and 545 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:25,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:25,738 INFO L93 Difference]: Finished difference Result 1007 states and 1174 transitions. [2023-11-29 00:22:25,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:22:25,739 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-11-29 00:22:25,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:25,741 INFO L225 Difference]: With dead ends: 1007 [2023-11-29 00:22:25,741 INFO L226 Difference]: Without dead ends: 591 [2023-11-29 00:22:25,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:22:25,743 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 101 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:25,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 338 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:22:25,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2023-11-29 00:22:25,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 416. [2023-11-29 00:22:25,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 354 states have (on average 1.115819209039548) internal successors, (395), 356 states have internal predecessors, (395), 42 states have call successors, (42), 19 states have call predecessors, (42), 19 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-29 00:22:25,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 479 transitions. [2023-11-29 00:22:25,803 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 479 transitions. Word has length 124 [2023-11-29 00:22:25,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:25,804 INFO L495 AbstractCegarLoop]: Abstraction has 416 states and 479 transitions. [2023-11-29 00:22:25,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:25,804 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 479 transitions. [2023-11-29 00:22:25,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-29 00:22:25,805 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:25,805 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:25,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 00:22:26,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 00:22:26,006 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:22:26,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:26,006 INFO L85 PathProgramCache]: Analyzing trace with hash 697401405, now seen corresponding path program 1 times [2023-11-29 00:22:26,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:26,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364548887] [2023-11-29 00:22:26,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:26,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:26,026 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:22:26,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1199980356] [2023-11-29 00:22:26,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:26,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:26,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:26,028 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:26,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 00:22:26,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:26,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:22:26,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:26,218 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:26,219 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 38 treesize of output 14 [2023-11-29 00:22:26,227 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-29 00:22:26,227 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:22:26,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:26,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364548887] [2023-11-29 00:22:26,227 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:22:26,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199980356] [2023-11-29 00:22:26,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199980356] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:22:26,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:22:26,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:22:26,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605636494] [2023-11-29 00:22:26,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:26,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:22:26,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:26,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:22:26,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:22:26,228 INFO L87 Difference]: Start difference. First operand 416 states and 479 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:26,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:26,660 INFO L93 Difference]: Finished difference Result 905 states and 1035 transitions. [2023-11-29 00:22:26,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:22:26,660 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-11-29 00:22:26,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:26,663 INFO L225 Difference]: With dead ends: 905 [2023-11-29 00:22:26,664 INFO L226 Difference]: Without dead ends: 534 [2023-11-29 00:22:26,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:22:26,665 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 89 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:26,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 329 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:22:26,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2023-11-29 00:22:26,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 416. [2023-11-29 00:22:26,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 354 states have (on average 1.112994350282486) internal successors, (394), 356 states have internal predecessors, (394), 42 states have call successors, (42), 19 states have call predecessors, (42), 19 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-29 00:22:26,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 478 transitions. [2023-11-29 00:22:26,731 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 478 transitions. Word has length 124 [2023-11-29 00:22:26,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:26,731 INFO L495 AbstractCegarLoop]: Abstraction has 416 states and 478 transitions. [2023-11-29 00:22:26,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:26,731 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 478 transitions. [2023-11-29 00:22:26,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-29 00:22:26,733 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:26,733 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:26,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 00:22:26,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 00:22:26,933 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:22:26,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:26,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1108036929, now seen corresponding path program 1 times [2023-11-29 00:22:26,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:26,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246506136] [2023-11-29 00:22:26,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:26,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:26,956 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:22:26,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [237458120] [2023-11-29 00:22:26,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:26,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:26,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:26,957 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:26,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 00:22:27,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:27,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 57 conjunts are in the unsatisfiable core [2023-11-29 00:22:27,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:27,162 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 19 treesize of output 1 [2023-11-29 00:22:27,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 00:22:27,167 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 19 treesize of output 1 [2023-11-29 00:22:27,197 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:27,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 34 [2023-11-29 00:22:27,217 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:27,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 37 [2023-11-29 00:22:27,326 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:27,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 21 [2023-11-29 00:22:27,415 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-29 00:22:27,415 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:22:27,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:27,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246506136] [2023-11-29 00:22:27,415 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:22:27,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237458120] [2023-11-29 00:22:27,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237458120] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:22:27,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:22:27,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-11-29 00:22:27,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548962598] [2023-11-29 00:22:27,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:27,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 00:22:27,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:27,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 00:22:27,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-11-29 00:22:27,417 INFO L87 Difference]: Start difference. First operand 416 states and 478 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:28,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:28,649 INFO L93 Difference]: Finished difference Result 949 states and 1081 transitions. [2023-11-29 00:22:28,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 00:22:28,650 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-11-29 00:22:28,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:28,652 INFO L225 Difference]: With dead ends: 949 [2023-11-29 00:22:28,652 INFO L226 Difference]: Without dead ends: 578 [2023-11-29 00:22:28,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=633, Unknown=0, NotChecked=0, Total=812 [2023-11-29 00:22:28,654 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 270 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 1049 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:28,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 1049 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 00:22:28,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2023-11-29 00:22:28,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 413. [2023-11-29 00:22:28,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 351 states have (on average 1.1139601139601139) internal successors, (391), 353 states have internal predecessors, (391), 42 states have call successors, (42), 19 states have call predecessors, (42), 19 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-29 00:22:28,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 475 transitions. [2023-11-29 00:22:28,715 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 475 transitions. Word has length 124 [2023-11-29 00:22:28,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:28,715 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 475 transitions. [2023-11-29 00:22:28,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:28,715 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 475 transitions. [2023-11-29 00:22:28,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-29 00:22:28,716 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:28,717 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:28,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 00:22:28,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:28,917 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:22:28,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:28,918 INFO L85 PathProgramCache]: Analyzing trace with hash 836511670, now seen corresponding path program 1 times [2023-11-29 00:22:28,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:28,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891295220] [2023-11-29 00:22:28,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:28,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:28,939 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:22:28,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [627248831] [2023-11-29 00:22:28,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:28,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:28,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:28,940 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:28,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 00:22:29,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:29,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 00:22:29,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:29,152 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:29,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 28 [2023-11-29 00:22:29,160 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:29,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 28 [2023-11-29 00:22:29,192 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:29,193 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 42 treesize of output 18 [2023-11-29 00:22:29,207 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-29 00:22:29,207 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:22:29,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:29,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891295220] [2023-11-29 00:22:29,207 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:22:29,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627248831] [2023-11-29 00:22:29,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627248831] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:22:29,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:22:29,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 00:22:29,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528469818] [2023-11-29 00:22:29,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:29,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:22:29,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:29,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:22:29,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:22:29,209 INFO L87 Difference]: Start difference. First operand 413 states and 475 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:29,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:29,772 INFO L93 Difference]: Finished difference Result 887 states and 1010 transitions. [2023-11-29 00:22:29,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 00:22:29,772 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-11-29 00:22:29,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:29,774 INFO L225 Difference]: With dead ends: 887 [2023-11-29 00:22:29,774 INFO L226 Difference]: Without dead ends: 519 [2023-11-29 00:22:29,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:22:29,775 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 101 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:29,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 505 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:22:29,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2023-11-29 00:22:29,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 393. [2023-11-29 00:22:29,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 331 states have (on average 1.0996978851963746) internal successors, (364), 333 states have internal predecessors, (364), 42 states have call successors, (42), 19 states have call predecessors, (42), 19 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-29 00:22:29,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 448 transitions. [2023-11-29 00:22:29,817 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 448 transitions. Word has length 124 [2023-11-29 00:22:29,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:29,817 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 448 transitions. [2023-11-29 00:22:29,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:29,817 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 448 transitions. [2023-11-29 00:22:29,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-29 00:22:29,818 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:29,818 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:29,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 00:22:30,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-29 00:22:30,019 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:22:30,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:30,019 INFO L85 PathProgramCache]: Analyzing trace with hash 770820785, now seen corresponding path program 1 times [2023-11-29 00:22:30,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:30,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068003908] [2023-11-29 00:22:30,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:30,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:30,040 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:22:30,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1367048686] [2023-11-29 00:22:30,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:30,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:30,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:30,041 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:30,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 00:22:30,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:30,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 00:22:30,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:30,237 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:30,238 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 19 treesize of output 7 [2023-11-29 00:22:30,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 27 [2023-11-29 00:22:30,508 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:30,508 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 83 treesize of output 41 [2023-11-29 00:22:30,607 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-29 00:22:30,607 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:22:30,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:30,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068003908] [2023-11-29 00:22:30,607 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:22:30,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367048686] [2023-11-29 00:22:30,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367048686] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:22:30,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:22:30,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-29 00:22:30,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947466568] [2023-11-29 00:22:30,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:30,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:22:30,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:30,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:22:30,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:22:30,609 INFO L87 Difference]: Start difference. First operand 393 states and 448 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:31,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:31,676 INFO L93 Difference]: Finished difference Result 535 states and 602 transitions. [2023-11-29 00:22:31,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 00:22:31,677 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 127 [2023-11-29 00:22:31,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:31,679 INFO L225 Difference]: With dead ends: 535 [2023-11-29 00:22:31,679 INFO L226 Difference]: Without dead ends: 533 [2023-11-29 00:22:31,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2023-11-29 00:22:31,680 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 131 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:31,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 888 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 00:22:31,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2023-11-29 00:22:31,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 477. [2023-11-29 00:22:31,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 414 states have (on average 1.0942028985507246) internal successors, (453), 416 states have internal predecessors, (453), 42 states have call successors, (42), 20 states have call predecessors, (42), 20 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-29 00:22:31,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 537 transitions. [2023-11-29 00:22:31,739 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 537 transitions. Word has length 127 [2023-11-29 00:22:31,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:31,739 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 537 transitions. [2023-11-29 00:22:31,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:31,739 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 537 transitions. [2023-11-29 00:22:31,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-29 00:22:31,740 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:31,740 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:31,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-29 00:22:31,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-29 00:22:31,941 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:22:31,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:31,941 INFO L85 PathProgramCache]: Analyzing trace with hash -38525841, now seen corresponding path program 1 times [2023-11-29 00:22:31,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:31,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425569817] [2023-11-29 00:22:31,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:31,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:31,958 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:22:31,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1432351359] [2023-11-29 00:22:31,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:31,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:31,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:31,959 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:31,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 00:22:32,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:32,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 00:22:32,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:32,146 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:32,146 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 19 treesize of output 7 [2023-11-29 00:22:32,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2023-11-29 00:22:32,197 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-29 00:22:32,197 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:22:32,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:32,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425569817] [2023-11-29 00:22:32,197 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:22:32,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432351359] [2023-11-29 00:22:32,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432351359] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:22:32,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:22:32,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:22:32,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637239189] [2023-11-29 00:22:32,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:32,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:22:32,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:32,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:22:32,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:22:32,199 INFO L87 Difference]: Start difference. First operand 477 states and 537 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:32,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:32,542 INFO L93 Difference]: Finished difference Result 968 states and 1091 transitions. [2023-11-29 00:22:32,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:22:32,543 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 127 [2023-11-29 00:22:32,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:32,545 INFO L225 Difference]: With dead ends: 968 [2023-11-29 00:22:32,545 INFO L226 Difference]: Without dead ends: 492 [2023-11-29 00:22:32,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:22:32,546 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 41 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:32,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 332 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:22:32,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2023-11-29 00:22:32,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 471. [2023-11-29 00:22:32,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 408 states have (on average 1.0906862745098038) internal successors, (445), 410 states have internal predecessors, (445), 42 states have call successors, (42), 20 states have call predecessors, (42), 20 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-29 00:22:32,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 529 transitions. [2023-11-29 00:22:32,599 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 529 transitions. Word has length 127 [2023-11-29 00:22:32,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:32,600 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 529 transitions. [2023-11-29 00:22:32,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:32,600 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 529 transitions. [2023-11-29 00:22:32,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-29 00:22:32,600 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:32,601 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:32,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-29 00:22:32,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-29 00:22:32,801 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:22:32,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:32,801 INFO L85 PathProgramCache]: Analyzing trace with hash 636807279, now seen corresponding path program 1 times [2023-11-29 00:22:32,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:32,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424225837] [2023-11-29 00:22:32,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:32,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:32,818 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:22:32,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2101405726] [2023-11-29 00:22:32,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:32,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:32,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:32,819 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:32,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-29 00:22:33,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:33,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 00:22:33,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:33,015 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:22:33,016 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 19 treesize of output 7 [2023-11-29 00:22:33,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-11-29 00:22:33,082 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-29 00:22:33,083 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:22:33,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:33,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424225837] [2023-11-29 00:22:33,083 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:22:33,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101405726] [2023-11-29 00:22:33,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101405726] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:22:33,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:22:33,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:22:33,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203575800] [2023-11-29 00:22:33,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:33,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:22:33,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:33,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:22:33,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:22:33,085 INFO L87 Difference]: Start difference. First operand 471 states and 529 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:33,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:33,402 INFO L93 Difference]: Finished difference Result 941 states and 1057 transitions. [2023-11-29 00:22:33,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:22:33,403 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 127 [2023-11-29 00:22:33,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:33,405 INFO L225 Difference]: With dead ends: 941 [2023-11-29 00:22:33,405 INFO L226 Difference]: Without dead ends: 471 [2023-11-29 00:22:33,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:22:33,406 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 48 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:33,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 391 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:22:33,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-11-29 00:22:33,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 471. [2023-11-29 00:22:33,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 408 states have (on average 1.088235294117647) internal successors, (444), 410 states have internal predecessors, (444), 42 states have call successors, (42), 20 states have call predecessors, (42), 20 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-29 00:22:33,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 528 transitions. [2023-11-29 00:22:33,460 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 528 transitions. Word has length 127 [2023-11-29 00:22:33,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:33,460 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 528 transitions. [2023-11-29 00:22:33,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:33,460 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 528 transitions. [2023-11-29 00:22:33,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-29 00:22:33,461 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:33,461 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:33,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-29 00:22:33,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-29 00:22:33,662 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:22:33,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:33,662 INFO L85 PathProgramCache]: Analyzing trace with hash -172539347, now seen corresponding path program 1 times [2023-11-29 00:22:33,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:33,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156518446] [2023-11-29 00:22:33,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:33,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:33,677 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:22:33,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1725770203] [2023-11-29 00:22:33,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:33,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:33,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:33,678 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:33,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-29 00:22:33,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:33,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 00:22:33,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:33,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:22:33,954 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-29 00:22:33,955 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:22:33,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:33,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156518446] [2023-11-29 00:22:33,955 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:22:33,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725770203] [2023-11-29 00:22:33,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725770203] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:22:33,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:22:33,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-29 00:22:33,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883023324] [2023-11-29 00:22:33,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:33,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 00:22:33,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:33,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 00:22:33,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:22:33,957 INFO L87 Difference]: Start difference. First operand 471 states and 528 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:34,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:34,901 INFO L93 Difference]: Finished difference Result 545 states and 621 transitions. [2023-11-29 00:22:34,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 00:22:34,901 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 127 [2023-11-29 00:22:34,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:34,902 INFO L225 Difference]: With dead ends: 545 [2023-11-29 00:22:34,902 INFO L226 Difference]: Without dead ends: 0 [2023-11-29 00:22:34,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2023-11-29 00:22:34,903 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 107 mSDsluCounter, 1270 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 1428 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:34,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 1428 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 00:22:34,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-29 00:22:34,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-29 00:22:34,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:34,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-29 00:22:34,904 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 127 [2023-11-29 00:22:34,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:34,904 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-29 00:22:34,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-29 00:22:34,904 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-29 00:22:34,904 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-29 00:22:34,906 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-29 00:22:34,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-29 00:22:35,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_007b26e5-5f4d-41da-b3c4-aede70d67f8a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-29 00:22:35,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.