./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/res1.c --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_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/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_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/res1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/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_887ade7d-14fa-4a95-b074-daeed1d0a32a/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 f274a5aba9f5a53aba1b5bf0fd0b9cf2990c13e825cbbe6f7043cc6fa5a18df6 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 20:44:28,716 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 20:44:28,801 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-28 20:44:28,805 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 20:44:28,805 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 20:44:28,828 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 20:44:28,829 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 20:44:28,829 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 20:44:28,830 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 20:44:28,831 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 20:44:28,831 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 20:44:28,832 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 20:44:28,833 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 20:44:28,833 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 20:44:28,834 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 20:44:28,834 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 20:44:28,835 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 20:44:28,835 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 20:44:28,836 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 20:44:28,836 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 20:44:28,837 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 20:44:28,837 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 20:44:28,838 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 20:44:28,838 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 20:44:28,838 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 20:44:28,839 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 20:44:28,839 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 20:44:28,839 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 20:44:28,840 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 20:44:28,840 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 20:44:28,840 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 20:44:28,841 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:44:28,841 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 20:44:28,841 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 20:44:28,842 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 20:44:28,842 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 20:44:28,842 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 20:44:28,842 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 20:44:28,842 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 20:44:28,842 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 20:44:28,843 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 20:44:28,843 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 20:44:28,843 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_887ade7d-14fa-4a95-b074-daeed1d0a32a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f274a5aba9f5a53aba1b5bf0fd0b9cf2990c13e825cbbe6f7043cc6fa5a18df6 [2023-11-28 20:44:29,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 20:44:29,110 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 20:44:29,112 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 20:44:29,113 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 20:44:29,113 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 20:44:29,114 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-fpi/res1.c [2023-11-28 20:44:31,855 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 20:44:32,010 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 20:44:32,011 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/sv-benchmarks/c/array-fpi/res1.c [2023-11-28 20:44:32,017 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/data/d6164c5f9/2cd22d8c32734d16a127c4ddb7dfe16e/FLAGda6c6b1b7 [2023-11-28 20:44:32,028 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/data/d6164c5f9/2cd22d8c32734d16a127c4ddb7dfe16e [2023-11-28 20:44:32,032 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 20:44:32,034 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 20:44:32,035 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 20:44:32,035 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 20:44:32,040 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 20:44:32,040 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:44:32" (1/1) ... [2023-11-28 20:44:32,041 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b01ee3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:44:32, skipping insertion in model container [2023-11-28 20:44:32,041 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:44:32" (1/1) ... [2023-11-28 20:44:32,061 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 20:44:32,238 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_887ade7d-14fa-4a95-b074-daeed1d0a32a/sv-benchmarks/c/array-fpi/res1.c[587,600] [2023-11-28 20:44:32,264 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:44:32,273 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 20:44:32,286 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_887ade7d-14fa-4a95-b074-daeed1d0a32a/sv-benchmarks/c/array-fpi/res1.c[587,600] [2023-11-28 20:44:32,295 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:44:32,310 INFO L206 MainTranslator]: Completed translation [2023-11-28 20:44:32,310 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:44:32 WrapperNode [2023-11-28 20:44:32,311 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 20:44:32,311 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 20:44:32,312 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 20:44:32,312 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 20:44:32,318 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:44:32" (1/1) ... [2023-11-28 20:44:32,326 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:44:32" (1/1) ... [2023-11-28 20:44:32,349 INFO L138 Inliner]: procedures = 17, calls = 31, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 95 [2023-11-28 20:44:32,349 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 20:44:32,350 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 20:44:32,350 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 20:44:32,350 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 20:44:32,360 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:44:32" (1/1) ... [2023-11-28 20:44:32,360 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:44:32" (1/1) ... [2023-11-28 20:44:32,362 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:44:32" (1/1) ... [2023-11-28 20:44:32,376 INFO L175 MemorySlicer]: Split 19 memory accesses to 5 slices as follows [2, 7, 2, 6, 2]. 37 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0, 0, 0]. The 5 writes are split as follows [0, 0, 1, 3, 1]. [2023-11-28 20:44:32,376 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:44:32" (1/1) ... [2023-11-28 20:44:32,377 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:44:32" (1/1) ... [2023-11-28 20:44:32,384 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:44:32" (1/1) ... [2023-11-28 20:44:32,388 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:44:32" (1/1) ... [2023-11-28 20:44:32,390 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:44:32" (1/1) ... [2023-11-28 20:44:32,391 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:44:32" (1/1) ... [2023-11-28 20:44:32,394 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 20:44:32,396 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 20:44:32,396 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 20:44:32,396 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 20:44:32,397 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:44:32" (1/1) ... [2023-11-28 20:44:32,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:44:32,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:44:32,423 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 20:44:32,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 20:44:32,461 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 20:44:32,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 20:44:32,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-28 20:44:32,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-28 20:44:32,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-28 20:44:32,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-28 20:44:32,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-28 20:44:32,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-28 20:44:32,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-28 20:44:32,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-28 20:44:32,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-28 20:44:32,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-28 20:44:32,464 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-28 20:44:32,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 20:44:32,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 20:44:32,464 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-28 20:44:32,464 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-28 20:44:32,465 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-28 20:44:32,465 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-28 20:44:32,465 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-28 20:44:32,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-28 20:44:32,552 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 20:44:32,554 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 20:44:32,693 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 20:44:32,725 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 20:44:32,725 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-28 20:44:32,726 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:44:32 BoogieIcfgContainer [2023-11-28 20:44:32,726 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 20:44:32,729 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 20:44:32,729 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 20:44:32,732 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 20:44:32,732 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:44:32" (1/3) ... [2023-11-28 20:44:32,733 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77cf5c77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:44:32, skipping insertion in model container [2023-11-28 20:44:32,733 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:44:32" (2/3) ... [2023-11-28 20:44:32,734 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77cf5c77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:44:32, skipping insertion in model container [2023-11-28 20:44:32,734 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:44:32" (3/3) ... [2023-11-28 20:44:32,735 INFO L112 eAbstractionObserver]: Analyzing ICFG res1.c [2023-11-28 20:44:32,751 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 20:44:32,751 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-28 20:44:32,794 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 20:44:32,800 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;@3d8d6bf5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 20:44:32,801 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-28 20:44:32,804 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:32,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-28 20:44:32,810 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:44:32,810 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:44:32,811 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:44:32,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:44:32,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1804282323, now seen corresponding path program 1 times [2023-11-28 20:44:32,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:44:32,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981148269] [2023-11-28 20:44:32,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:32,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:44:32,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:32,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:44:32,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:44:32,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981148269] [2023-11-28 20:44:32,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981148269] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:44:32,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:44:32,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:44:32,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430775207] [2023-11-28 20:44:32,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:44:32,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-28 20:44:32,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:44:33,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-28 20:44:33,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 20:44:33,017 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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) [2023-11-28 20:44:33,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:44:33,052 INFO L93 Difference]: Finished difference Result 33 states and 51 transitions. [2023-11-28 20:44:33,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-28 20:44:33,056 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-28 20:44:33,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:44:33,065 INFO L225 Difference]: With dead ends: 33 [2023-11-28 20:44:33,065 INFO L226 Difference]: Without dead ends: 15 [2023-11-28 20:44:33,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 20:44:33,074 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:44:33,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:44:33,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-28 20:44:33,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-28 20:44:33,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:33,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2023-11-28 20:44:33,115 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 14 [2023-11-28 20:44:33,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:44:33,116 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2023-11-28 20:44:33,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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) [2023-11-28 20:44:33,116 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2023-11-28 20:44:33,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-28 20:44:33,117 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:44:33,118 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:44:33,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-28 20:44:33,119 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:44:33,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:44:33,119 INFO L85 PathProgramCache]: Analyzing trace with hash 2062269015, now seen corresponding path program 1 times [2023-11-28 20:44:33,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:44:33,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097005933] [2023-11-28 20:44:33,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:33,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:44:33,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:33,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:44:33,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:44:33,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097005933] [2023-11-28 20:44:33,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097005933] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:44:33,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:44:33,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:44:33,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610102329] [2023-11-28 20:44:33,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:44:33,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:44:33,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:44:33,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:44:33,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:44:33,302 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2023-11-28 20:44:33,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:44:33,356 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2023-11-28 20:44:33,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:44:33,357 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-28 20:44:33,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:44:33,358 INFO L225 Difference]: With dead ends: 29 [2023-11-28 20:44:33,359 INFO L226 Difference]: Without dead ends: 19 [2023-11-28 20:44:33,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:44:33,361 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:44:33,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 10 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:44:33,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-28 20:44:33,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-28 20:44:33,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:33,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-11-28 20:44:33,370 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 14 [2023-11-28 20:44:33,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:44:33,370 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-11-28 20:44:33,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2023-11-28 20:44:33,371 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-11-28 20:44:33,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-28 20:44:33,372 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:44:33,372 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:44:33,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-28 20:44:33,373 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:44:33,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:44:33,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1610127347, now seen corresponding path program 1 times [2023-11-28 20:44:33,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:44:33,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780970466] [2023-11-28 20:44:33,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:33,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:44:33,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:34,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:44:34,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:44:34,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780970466] [2023-11-28 20:44:34,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780970466] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:44:34,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132606134] [2023-11-28 20:44:34,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:34,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:34,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:44:34,416 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:44:34,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 20:44:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:34,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-28 20:44:34,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:44:34,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:44:34,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:44:34,800 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 11 treesize of output 7 [2023-11-28 20:44:34,964 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 29 treesize of output 17 [2023-11-28 20:44:34,970 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 19 treesize of output 11 [2023-11-28 20:44:35,075 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 25 treesize of output 13 [2023-11-28 20:44:35,124 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 15 treesize of output 7 [2023-11-28 20:44:35,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:44:35,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:44:35,277 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 29 treesize of output 27 [2023-11-28 20:44:35,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 45 treesize of output 43 [2023-11-28 20:44:35,348 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 22 treesize of output 20 [2023-11-28 20:44:35,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 34 treesize of output 32 [2023-11-28 20:44:35,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:44:35,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132606134] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:44:35,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:44:35,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2023-11-28 20:44:35,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578359004] [2023-11-28 20:44:35,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:44:35,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-28 20:44:35,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:44:35,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-28 20:44:35,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2023-11-28 20:44:35,400 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 28 states have internal predecessors, (43), 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) [2023-11-28 20:44:35,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:44:35,576 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2023-11-28 20:44:35,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-28 20:44:35,577 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-28 20:44:35,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:44:35,578 INFO L225 Difference]: With dead ends: 27 [2023-11-28 20:44:35,578 INFO L226 Difference]: Without dead ends: 23 [2023-11-28 20:44:35,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2023-11-28 20:44:35,580 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:44:35,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 44 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:44:35,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-28 20:44:35,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-11-28 20:44:35,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 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) [2023-11-28 20:44:35,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-11-28 20:44:35,588 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 18 [2023-11-28 20:44:35,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:44:35,588 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-11-28 20:44:35,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 28 states have internal predecessors, (43), 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) [2023-11-28 20:44:35,589 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-11-28 20:44:35,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-28 20:44:35,589 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:44:35,589 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:44:35,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 20:44:35,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:35,791 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:44:35,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:44:35,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1605583531, now seen corresponding path program 2 times [2023-11-28 20:44:35,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:44:35,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220471358] [2023-11-28 20:44:35,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:35,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:44:35,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:35,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-28 20:44:35,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:44:35,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220471358] [2023-11-28 20:44:35,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220471358] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:44:35,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539283168] [2023-11-28 20:44:35,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:44:35,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:35,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:44:35,978 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:44:35,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 20:44:36,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:44:36,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:44:36,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 20:44:36,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:44:36,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-28 20:44:36,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:44:36,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-28 20:44:36,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539283168] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:44:36,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:44:36,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-28 20:44:36,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296885722] [2023-11-28 20:44:36,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:44:36,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-28 20:44:36,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:44:36,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-28 20:44:36,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-28 20:44:36,169 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 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) [2023-11-28 20:44:36,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:44:36,322 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2023-11-28 20:44:36,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-28 20:44:36,323 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-28 20:44:36,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:44:36,324 INFO L225 Difference]: With dead ends: 52 [2023-11-28 20:44:36,324 INFO L226 Difference]: Without dead ends: 27 [2023-11-28 20:44:36,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-11-28 20:44:36,325 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:44:36,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 33 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:44:36,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-28 20:44:36,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2023-11-28 20:44:36,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 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) [2023-11-28 20:44:36,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-11-28 20:44:36,332 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 19 [2023-11-28 20:44:36,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:44:36,332 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-11-28 20:44:36,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 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) [2023-11-28 20:44:36,332 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-11-28 20:44:36,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-28 20:44:36,333 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:44:36,333 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:44:36,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-28 20:44:36,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:36,534 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:44:36,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:44:36,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1351071695, now seen corresponding path program 3 times [2023-11-28 20:44:36,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:44:36,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828866257] [2023-11-28 20:44:36,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:36,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:44:36,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-28 20:44:36,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:44:36,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828866257] [2023-11-28 20:44:36,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828866257] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:44:36,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597094042] [2023-11-28 20:44:36,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:44:36,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:36,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:44:36,646 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:44:36,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 20:44:36,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-28 20:44:36,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:44:36,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 20:44:36,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:44:36,791 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-28 20:44:36,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:44:36,844 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-28 20:44:36,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597094042] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:44:36,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:44:36,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-28 20:44:36,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624892667] [2023-11-28 20:44:36,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:44:36,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-28 20:44:36,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:44:36,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-28 20:44:36,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-28 20:44:36,847 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 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) [2023-11-28 20:44:36,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:44:36,933 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2023-11-28 20:44:36,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 20:44:36,934 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-28 20:44:36,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:44:36,935 INFO L225 Difference]: With dead ends: 27 [2023-11-28 20:44:36,935 INFO L226 Difference]: Without dead ends: 23 [2023-11-28 20:44:36,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-11-28 20:44:36,936 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:44:36,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 22 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:44:36,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-28 20:44:36,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-28 20:44:36,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 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) [2023-11-28 20:44:36,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-11-28 20:44:36,944 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 21 [2023-11-28 20:44:36,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:44:36,944 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-11-28 20:44:36,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 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) [2023-11-28 20:44:36,945 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-11-28 20:44:36,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-28 20:44:36,945 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:44:36,945 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:44:36,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-28 20:44:37,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:37,149 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:44:37,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:44:37,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1086526679, now seen corresponding path program 4 times [2023-11-28 20:44:37,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:44:37,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074886586] [2023-11-28 20:44:37,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:37,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:44:37,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:38,622 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:44:38,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:44:38,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074886586] [2023-11-28 20:44:38,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074886586] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:44:38,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473505411] [2023-11-28 20:44:38,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 20:44:38,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:38,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:44:38,625 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:44:38,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 20:44:38,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 20:44:38,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:44:38,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-28 20:44:38,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:44:38,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:44:38,771 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 25 treesize of output 1 [2023-11-28 20:44:38,823 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 36 treesize of output 16 [2023-11-28 20:44:39,029 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 11 treesize of output 7 [2023-11-28 20:44:39,106 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 19 treesize of output 18 [2023-11-28 20:44:39,341 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 29 treesize of output 17 [2023-11-28 20:44:39,432 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:44:39,432 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 51 treesize of output 31 [2023-11-28 20:44:39,438 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 36 treesize of output 13 [2023-11-28 20:44:39,548 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 25 treesize of output 13 [2023-11-28 20:44:39,606 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 25 treesize of output 13 [2023-11-28 20:44:39,651 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 15 treesize of output 7 [2023-11-28 20:44:39,672 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:44:39,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:44:40,024 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 66 treesize of output 62 [2023-11-28 20:44:40,033 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:44:40,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 553 treesize of output 529 [2023-11-28 20:44:40,306 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:44:40,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473505411] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:44:40,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:44:40,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 45 [2023-11-28 20:44:40,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390268927] [2023-11-28 20:44:40,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:44:40,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-28 20:44:40,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:44:40,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-28 20:44:40,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1663, Unknown=0, NotChecked=0, Total=1980 [2023-11-28 20:44:40,310 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 45 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:42,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:44:42,021 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2023-11-28 20:44:42,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-28 20:44:42,021 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-28 20:44:42,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:44:42,023 INFO L225 Difference]: With dead ends: 43 [2023-11-28 20:44:42,023 INFO L226 Difference]: Without dead ends: 37 [2023-11-28 20:44:42,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=750, Invalid=3672, Unknown=0, NotChecked=0, Total=4422 [2023-11-28 20:44:42,025 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 29 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 20:44:42,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 106 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 20:44:42,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-28 20:44:42,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2023-11-28 20:44:42,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:42,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-11-28 20:44:42,036 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 22 [2023-11-28 20:44:42,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:44:42,036 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-11-28 20:44:42,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:42,036 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-11-28 20:44:42,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-28 20:44:42,037 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:44:42,037 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:44:42,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-28 20:44:42,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:42,238 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:44:42,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:44:42,238 INFO L85 PathProgramCache]: Analyzing trace with hash -657335055, now seen corresponding path program 5 times [2023-11-28 20:44:42,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:44:42,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913926596] [2023-11-28 20:44:42,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:42,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:44:42,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:42,352 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-28 20:44:42,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:44:42,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913926596] [2023-11-28 20:44:42,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913926596] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:44:42,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747603785] [2023-11-28 20:44:42,353 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 20:44:42,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:42,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:44:42,357 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:44:42,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-28 20:44:42,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-28 20:44:42,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:44:42,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 20:44:42,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:44:42,525 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-28 20:44:42,525 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:44:42,582 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-28 20:44:42,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747603785] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:44:42,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:44:42,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-28 20:44:42,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323267317] [2023-11-28 20:44:42,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:44:42,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-28 20:44:42,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:44:42,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-28 20:44:42,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-28 20:44:42,585 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:42,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:44:42,729 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2023-11-28 20:44:42,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-28 20:44:42,729 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-28 20:44:42,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:44:42,730 INFO L225 Difference]: With dead ends: 61 [2023-11-28 20:44:42,730 INFO L226 Difference]: Without dead ends: 31 [2023-11-28 20:44:42,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-11-28 20:44:42,731 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 26 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:44:42,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 35 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:44:42,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-28 20:44:42,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2023-11-28 20:44:42,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:42,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-11-28 20:44:42,741 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 23 [2023-11-28 20:44:42,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:44:42,741 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-11-28 20:44:42,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:42,741 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-11-28 20:44:42,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-28 20:44:42,742 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:44:42,742 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:44:42,748 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-28 20:44:42,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:42,943 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:44:42,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:44:42,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1840892267, now seen corresponding path program 6 times [2023-11-28 20:44:42,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:44:42,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302941848] [2023-11-28 20:44:42,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:42,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:44:42,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:43,048 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-28 20:44:43,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:44:43,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302941848] [2023-11-28 20:44:43,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302941848] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:44:43,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125994741] [2023-11-28 20:44:43,049 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-28 20:44:43,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:43,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:44:43,050 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:44:43,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-28 20:44:43,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-28 20:44:43,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:44:43,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 20:44:43,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:44:43,235 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-28 20:44:43,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:44:43,297 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-28 20:44:43,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125994741] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:44:43,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:44:43,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-28 20:44:43,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749861876] [2023-11-28 20:44:43,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:44:43,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-28 20:44:43,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:44:43,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-28 20:44:43,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-28 20:44:43,300 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:43,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:44:43,390 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2023-11-28 20:44:43,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-28 20:44:43,390 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-28 20:44:43,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:44:43,391 INFO L225 Difference]: With dead ends: 31 [2023-11-28 20:44:43,391 INFO L226 Difference]: Without dead ends: 27 [2023-11-28 20:44:43,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2023-11-28 20:44:43,392 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:44:43,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 20 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:44:43,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-28 20:44:43,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-28 20:44:43,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:43,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2023-11-28 20:44:43,403 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 25 [2023-11-28 20:44:43,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:44:43,403 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2023-11-28 20:44:43,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:43,403 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2023-11-28 20:44:43,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-28 20:44:43,404 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:44:43,404 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:44:43,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-28 20:44:43,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:43,610 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:44:43,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:44:43,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1213009165, now seen corresponding path program 7 times [2023-11-28 20:44:43,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:44:43,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164415718] [2023-11-28 20:44:43,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:43,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:44:43,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:46,071 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:44:46,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:44:46,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164415718] [2023-11-28 20:44:46,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164415718] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:44:46,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38122587] [2023-11-28 20:44:46,072 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-28 20:44:46,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:46,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:44:46,073 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:44:46,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-28 20:44:46,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:46,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 66 conjunts are in the unsatisfiable core [2023-11-28 20:44:46,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:44:46,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:44:46,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:44:46,258 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 23 treesize of output 11 [2023-11-28 20:44:46,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-28 20:44:46,459 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 11 treesize of output 7 [2023-11-28 20:44:46,536 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 19 treesize of output 18 [2023-11-28 20:44:46,618 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:44:46,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-28 20:44:46,820 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 29 treesize of output 17 [2023-11-28 20:44:46,915 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 33 treesize of output 21 [2023-11-28 20:44:46,990 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 39 treesize of output 27 [2023-11-28 20:44:46,997 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:44:46,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 20 [2023-11-28 20:44:47,107 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 25 treesize of output 13 [2023-11-28 20:44:47,169 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 25 treesize of output 13 [2023-11-28 20:44:47,220 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 25 treesize of output 13 [2023-11-28 20:44:47,261 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 15 treesize of output 7 [2023-11-28 20:44:47,293 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:44:47,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:44:47,784 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 119 treesize of output 113 [2023-11-28 20:44:47,796 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:44:47,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 22498 treesize of output 21858 [2023-11-28 20:44:48,222 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 100 treesize of output 94 [2023-11-28 20:44:48,272 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:44:48,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 440002 treesize of output 419522 [2023-11-28 20:44:48,433 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:44:48,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38122587] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:44:48,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:44:48,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 53 [2023-11-28 20:44:48,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896779843] [2023-11-28 20:44:48,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:44:48,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-28 20:44:48,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:44:48,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-28 20:44:48,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=2442, Unknown=0, NotChecked=0, Total=2756 [2023-11-28 20:44:48,437 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 53 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 53 states have internal predecessors, (67), 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) [2023-11-28 20:44:49,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:44:49,608 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2023-11-28 20:44:49,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-28 20:44:49,609 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 53 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-28 20:44:49,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:44:49,610 INFO L225 Difference]: With dead ends: 37 [2023-11-28 20:44:49,610 INFO L226 Difference]: Without dead ends: 33 [2023-11-28 20:44:49,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1488 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=502, Invalid=3658, Unknown=0, NotChecked=0, Total=4160 [2023-11-28 20:44:49,612 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 14 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-28 20:44:49,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 97 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-28 20:44:49,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-28 20:44:49,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2023-11-28 20:44:49,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 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) [2023-11-28 20:44:49,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2023-11-28 20:44:49,622 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 26 [2023-11-28 20:44:49,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:44:49,622 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2023-11-28 20:44:49,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 53 states have internal predecessors, (67), 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) [2023-11-28 20:44:49,622 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2023-11-28 20:44:49,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-28 20:44:49,623 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:44:49,623 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:44:49,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-28 20:44:49,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:49,824 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:44:49,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:44:49,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1071497813, now seen corresponding path program 8 times [2023-11-28 20:44:49,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:44:49,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40077239] [2023-11-28 20:44:49,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:49,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:44:49,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:49,935 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-28 20:44:49,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:44:49,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40077239] [2023-11-28 20:44:49,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40077239] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:44:49,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205155687] [2023-11-28 20:44:49,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:44:49,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:49,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:44:49,937 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:44:49,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-28 20:44:50,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:44:50,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:44:50,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-28 20:44:50,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:44:50,128 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-28 20:44:50,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:44:50,193 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-28 20:44:50,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205155687] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:44:50,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:44:50,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-28 20:44:50,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788204972] [2023-11-28 20:44:50,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:44:50,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-28 20:44:50,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:44:50,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-28 20:44:50,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-28 20:44:50,196 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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) [2023-11-28 20:44:50,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:44:50,360 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2023-11-28 20:44:50,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-28 20:44:50,360 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-28 20:44:50,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:44:50,361 INFO L225 Difference]: With dead ends: 70 [2023-11-28 20:44:50,361 INFO L226 Difference]: Without dead ends: 35 [2023-11-28 20:44:50,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2023-11-28 20:44:50,362 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 26 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:44:50,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 33 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:44:50,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-28 20:44:50,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2023-11-28 20:44:50,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:50,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2023-11-28 20:44:50,374 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 27 [2023-11-28 20:44:50,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:44:50,374 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2023-11-28 20:44:50,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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) [2023-11-28 20:44:50,374 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2023-11-28 20:44:50,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-28 20:44:50,375 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:44:50,375 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:44:50,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-28 20:44:50,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:50,576 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:44:50,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:44:50,576 INFO L85 PathProgramCache]: Analyzing trace with hash 777477553, now seen corresponding path program 9 times [2023-11-28 20:44:50,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:44:50,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329772780] [2023-11-28 20:44:50,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:50,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:44:50,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:50,715 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-28 20:44:50,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:44:50,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329772780] [2023-11-28 20:44:50,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329772780] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:44:50,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847462535] [2023-11-28 20:44:50,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:44:50,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:50,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:44:50,717 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:44:50,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-28 20:44:50,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-28 20:44:50,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:44:50,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-28 20:44:50,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:44:51,013 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-28 20:44:51,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:44:51,086 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-28 20:44:51,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847462535] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:44:51,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:44:51,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-28 20:44:51,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497247143] [2023-11-28 20:44:51,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:44:51,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-28 20:44:51,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:44:51,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-28 20:44:51,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-28 20:44:51,088 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:51,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:44:51,216 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2023-11-28 20:44:51,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-28 20:44:51,216 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-11-28 20:44:51,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:44:51,217 INFO L225 Difference]: With dead ends: 35 [2023-11-28 20:44:51,217 INFO L226 Difference]: Without dead ends: 31 [2023-11-28 20:44:51,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 48 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2023-11-28 20:44:51,218 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:44:51,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 20 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:44:51,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-28 20:44:51,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-11-28 20:44:51,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 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) [2023-11-28 20:44:51,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2023-11-28 20:44:51,230 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 29 [2023-11-28 20:44:51,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:44:51,230 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2023-11-28 20:44:51,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:44:51,231 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2023-11-28 20:44:51,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-28 20:44:51,231 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:44:51,232 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:44:51,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-28 20:44:51,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:51,432 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:44:51,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:44:51,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1647923369, now seen corresponding path program 10 times [2023-11-28 20:44:51,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:44:51,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609020121] [2023-11-28 20:44:51,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:51,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:44:51,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:54,539 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:44:54,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:44:54,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609020121] [2023-11-28 20:44:54,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609020121] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:44:54,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601976266] [2023-11-28 20:44:54,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 20:44:54,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:54,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:44:54,541 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:44:54,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-28 20:44:54,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 20:44:54,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:44:54,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 86 conjunts are in the unsatisfiable core [2023-11-28 20:44:54,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:44:54,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:44:54,798 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 [2023-11-28 20:44:54,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:44:54,866 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 33 treesize of output 13 [2023-11-28 20:44:54,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:44:54,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:44:54,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2023-11-28 20:44:55,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:44:55,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:44:55,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:44:55,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2023-11-28 20:45:01,942 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 11 treesize of output 7 [2023-11-28 20:45:06,049 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 19 treesize of output 18 [2023-11-28 20:45:10,174 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:45:10,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-28 20:45:14,328 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:45:14,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-11-28 20:45:18,817 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 29 treesize of output 17 [2023-11-28 20:45:18,972 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 33 treesize of output 21 [2023-11-28 20:45:19,172 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 39 treesize of output 27 [2023-11-28 20:45:19,343 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 44 treesize of output 32 [2023-11-28 20:45:19,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:45:19,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:45:19,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:45:19,352 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-28 20:45:19,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:45:19,353 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-28 20:45:19,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:45:19,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:45:19,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:45:19,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:45:19,358 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-28 20:45:19,359 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-28 20:45:19,366 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:45:19,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 70 treesize of output 36 [2023-11-28 20:45:19,557 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 25 treesize of output 13 [2023-11-28 20:45:19,651 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 25 treesize of output 13 [2023-11-28 20:45:19,745 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 25 treesize of output 13 [2023-11-28 20:45:19,831 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 25 treesize of output 13 [2023-11-28 20:45:19,886 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 15 treesize of output 7 [2023-11-28 20:45:19,923 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:45:19,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:45:21,033 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 188 treesize of output 180 [2023-11-28 20:45:21,058 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:45:21,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3153851 treesize of output 3096507 [2023-11-28 20:45:22,459 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 20 treesize of output 18 [2023-11-28 20:45:22,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 30 treesize of output 28 [2023-11-28 20:45:22,534 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:45:22,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601976266] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:45:22,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:45:22,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 69 [2023-11-28 20:45:22,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21491073] [2023-11-28 20:45:22,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:45:22,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-11-28 20:45:22,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:45:22,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-11-28 20:45:22,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=598, Invalid=4087, Unknown=7, NotChecked=0, Total=4692 [2023-11-28 20:45:22,538 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 69 states, 69 states have (on average 1.144927536231884) internal successors, (79), 69 states have internal predecessors, (79), 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) [2023-11-28 20:45:30,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:45:30,573 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2023-11-28 20:45:30,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-28 20:45:30,574 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.144927536231884) internal successors, (79), 69 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-11-28 20:45:30,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:45:30,575 INFO L225 Difference]: With dead ends: 71 [2023-11-28 20:45:30,575 INFO L226 Difference]: Without dead ends: 65 [2023-11-28 20:45:30,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3864 ImplicationChecksByTransitivity, 33.4s TimeCoverageRelationStatistics Valid=1626, Invalid=10357, Unknown=7, NotChecked=0, Total=11990 [2023-11-28 20:45:30,581 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 88 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:45:30,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 108 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-28 20:45:30,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-28 20:45:30,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 34. [2023-11-28 20:45:30,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:45:30,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2023-11-28 20:45:30,597 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 30 [2023-11-28 20:45:30,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:45:30,597 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2023-11-28 20:45:30,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.144927536231884) internal successors, (79), 69 states have internal predecessors, (79), 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) [2023-11-28 20:45:30,597 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2023-11-28 20:45:30,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-28 20:45:30,598 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:45:30,598 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:45:30,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-28 20:45:30,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-28 20:45:30,799 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:45:30,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:45:30,799 INFO L85 PathProgramCache]: Analyzing trace with hash 474059377, now seen corresponding path program 11 times [2023-11-28 20:45:30,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:45:30,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629777230] [2023-11-28 20:45:30,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:45:30,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:45:30,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:45:30,991 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-28 20:45:30,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:45:30,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629777230] [2023-11-28 20:45:30,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629777230] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:45:30,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54043510] [2023-11-28 20:45:30,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 20:45:30,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:45:30,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:45:30,993 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:45:30,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-28 20:45:31,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-28 20:45:31,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:45:31,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-28 20:45:31,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:45:31,459 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-28 20:45:31,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:45:31,559 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-28 20:45:31,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54043510] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:45:31,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:45:31,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-11-28 20:45:31,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355728812] [2023-11-28 20:45:31,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:45:31,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-28 20:45:31,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:45:31,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-28 20:45:31,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-11-28 20:45:31,561 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 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) [2023-11-28 20:45:31,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:45:31,752 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2023-11-28 20:45:31,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-28 20:45:31,752 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-28 20:45:31,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:45:31,753 INFO L225 Difference]: With dead ends: 79 [2023-11-28 20:45:31,753 INFO L226 Difference]: Without dead ends: 39 [2023-11-28 20:45:31,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2023-11-28 20:45:31,754 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 38 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:45:31,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 29 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:45:31,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-28 20:45:31,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2023-11-28 20:45:31,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:45:31,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2023-11-28 20:45:31,769 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 31 [2023-11-28 20:45:31,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:45:31,769 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2023-11-28 20:45:31,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 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) [2023-11-28 20:45:31,769 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2023-11-28 20:45:31,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-28 20:45:31,770 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:45:31,770 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:45:31,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-28 20:45:31,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-28 20:45:31,970 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:45:31,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:45:31,970 INFO L85 PathProgramCache]: Analyzing trace with hash 181664661, now seen corresponding path program 12 times [2023-11-28 20:45:31,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:45:31,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096398089] [2023-11-28 20:45:31,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:45:31,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:45:31,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:45:32,121 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-28 20:45:32,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:45:32,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096398089] [2023-11-28 20:45:32,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096398089] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:45:32,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837933653] [2023-11-28 20:45:32,122 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-28 20:45:32,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:45:32,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:45:32,123 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:45:32,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-28 20:45:32,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-28 20:45:32,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:45:32,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-28 20:45:32,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:45:32,385 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-28 20:45:32,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:45:32,467 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-28 20:45:32,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837933653] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:45:32,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:45:32,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-11-28 20:45:32,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920866034] [2023-11-28 20:45:32,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:45:32,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-28 20:45:32,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:45:32,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-28 20:45:32,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-11-28 20:45:32,469 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 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) [2023-11-28 20:45:32,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:45:32,629 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2023-11-28 20:45:32,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-28 20:45:32,629 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-11-28 20:45:32,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:45:32,630 INFO L225 Difference]: With dead ends: 39 [2023-11-28 20:45:32,630 INFO L226 Difference]: Without dead ends: 35 [2023-11-28 20:45:32,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 54 SyntacticMatches, 10 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2023-11-28 20:45:32,631 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 27 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:45:32,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 28 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:45:32,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-28 20:45:32,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-11-28 20:45:32,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:45:32,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2023-11-28 20:45:32,648 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 33 [2023-11-28 20:45:32,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:45:32,648 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2023-11-28 20:45:32,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 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) [2023-11-28 20:45:32,649 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2023-11-28 20:45:32,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-28 20:45:32,649 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:45:32,649 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:45:32,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-28 20:45:32,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-28 20:45:32,850 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:45:32,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:45:32,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1356713459, now seen corresponding path program 13 times [2023-11-28 20:45:32,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:45:32,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240720656] [2023-11-28 20:45:32,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:45:32,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:45:32,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:45:36,322 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:45:36,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:45:36,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240720656] [2023-11-28 20:45:36,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240720656] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:45:36,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098236481] [2023-11-28 20:45:36,322 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-28 20:45:36,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:45:36,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:45:36,323 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:45:36,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-28 20:45:36,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:45:36,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 100 conjunts are in the unsatisfiable core [2023-11-28 20:45:36,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:45:36,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:45:36,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:45:36,527 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 23 treesize of output 11 [2023-11-28 20:45:36,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-28 20:45:36,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2023-11-28 20:45:36,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 41 [2023-11-28 20:45:36,941 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 11 treesize of output 7 [2023-11-28 20:45:37,050 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 19 treesize of output 18 [2023-11-28 20:45:37,174 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:45:37,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-28 20:45:37,302 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:45:37,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-11-28 20:45:37,420 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:45:37,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-11-28 20:45:37,739 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 29 treesize of output 17 [2023-11-28 20:45:37,885 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 33 treesize of output 21 [2023-11-28 20:45:38,042 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 39 treesize of output 27 [2023-11-28 20:45:38,202 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 44 treesize of output 32 [2023-11-28 20:45:38,337 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 49 treesize of output 37 [2023-11-28 20:45:38,345 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:45:38,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 68 treesize of output 28 [2023-11-28 20:45:38,568 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 25 treesize of output 13 [2023-11-28 20:45:38,653 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 25 treesize of output 13 [2023-11-28 20:45:38,740 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 25 treesize of output 13 [2023-11-28 20:45:38,841 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 25 treesize of output 13 [2023-11-28 20:45:38,931 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 25 treesize of output 13 [2023-11-28 20:45:38,987 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 15 treesize of output 7 [2023-11-28 20:45:39,037 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:45:39,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:45:40,429 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 273 treesize of output 263 [2023-11-28 20:45:40,477 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:45:40,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1839305172 treesize of output 1820430804 [2023-11-28 20:45:41,905 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 240 treesize of output 230 [2023-11-28 20:45:45,868 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:45:45,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 4166719812129622 treesize of output 4087554974929750 [2023-11-28 20:46:06,207 WARN L293 SmtUtils]: Spent 19.92s on a formula simplification. DAG size of input: 85215 DAG size of output: 102 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 20:46:06,607 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:46:06,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098236481] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:46:06,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:46:06,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 77 [2023-11-28 20:46:06,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669227466] [2023-11-28 20:46:06,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:46:06,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2023-11-28 20:46:06,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:46:06,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2023-11-28 20:46:06,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=542, Invalid=5310, Unknown=0, NotChecked=0, Total=5852 [2023-11-28 20:46:06,611 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 77 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 77 states have internal predecessors, (91), 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) [2023-11-28 20:46:13,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:46:13,601 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2023-11-28 20:46:13,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-28 20:46:13,601 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 77 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-28 20:46:13,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:46:13,602 INFO L225 Difference]: With dead ends: 47 [2023-11-28 20:46:13,602 INFO L226 Difference]: Without dead ends: 43 [2023-11-28 20:46:13,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3330 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=860, Invalid=8070, Unknown=0, NotChecked=0, Total=8930 [2023-11-28 20:46:13,607 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:46:13,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 144 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1090 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-11-28 20:46:13,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-28 20:46:13,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2023-11-28 20:46:13,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:13,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2023-11-28 20:46:13,635 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 34 [2023-11-28 20:46:13,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:46:13,635 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2023-11-28 20:46:13,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 77 states have internal predecessors, (91), 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) [2023-11-28 20:46:13,635 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2023-11-28 20:46:13,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-28 20:46:13,636 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:46:13,636 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:46:13,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-28 20:46:13,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-28 20:46:13,836 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:46:13,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:46:13,837 INFO L85 PathProgramCache]: Analyzing trace with hash -871479467, now seen corresponding path program 14 times [2023-11-28 20:46:13,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:46:13,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135254913] [2023-11-28 20:46:13,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:46:13,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:46:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:46:14,218 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-28 20:46:14,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:46:14,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135254913] [2023-11-28 20:46:14,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135254913] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:46:14,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503229522] [2023-11-28 20:46:14,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:46:14,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:46:14,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:46:14,219 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:46:14,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-28 20:46:14,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:46:14,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:46:14,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-28 20:46:14,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:46:14,697 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-28 20:46:14,697 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:46:14,999 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-28 20:46:14,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503229522] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:46:14,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:46:14,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-11-28 20:46:14,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232774837] [2023-11-28 20:46:14,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:46:15,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-28 20:46:15,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:46:15,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-28 20:46:15,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2023-11-28 20:46:15,001 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:15,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:46:15,546 INFO L93 Difference]: Finished difference Result 88 states and 99 transitions. [2023-11-28 20:46:15,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-28 20:46:15,547 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-11-28 20:46:15,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:46:15,547 INFO L225 Difference]: With dead ends: 88 [2023-11-28 20:46:15,547 INFO L226 Difference]: Without dead ends: 43 [2023-11-28 20:46:15,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 51 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2023-11-28 20:46:15,549 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 36 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 20:46:15,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 30 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 20:46:15,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-28 20:46:15,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2023-11-28 20:46:15,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:15,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2023-11-28 20:46:15,578 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 35 [2023-11-28 20:46:15,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:46:15,578 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2023-11-28 20:46:15,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:15,579 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2023-11-28 20:46:15,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-28 20:46:15,579 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:46:15,579 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:46:15,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-28 20:46:15,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-28 20:46:15,780 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:46:15,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:46:15,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1606824753, now seen corresponding path program 15 times [2023-11-28 20:46:15,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:46:15,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118148192] [2023-11-28 20:46:15,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:46:15,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:46:15,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:46:16,143 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-28 20:46:16,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:46:16,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118148192] [2023-11-28 20:46:16,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118148192] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:46:16,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335403407] [2023-11-28 20:46:16,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:46:16,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:46:16,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:46:16,145 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:46:16,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-28 20:46:16,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-28 20:46:16,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:46:16,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-28 20:46:16,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:46:16,821 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-28 20:46:16,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:46:17,150 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-28 20:46:17,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335403407] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:46:17,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:46:17,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-11-28 20:46:17,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442158550] [2023-11-28 20:46:17,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:46:17,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-28 20:46:17,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:46:17,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-28 20:46:17,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2023-11-28 20:46:17,153 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:17,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:46:17,767 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2023-11-28 20:46:17,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-28 20:46:17,768 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-28 20:46:17,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:46:17,768 INFO L225 Difference]: With dead ends: 43 [2023-11-28 20:46:17,768 INFO L226 Difference]: Without dead ends: 39 [2023-11-28 20:46:17,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 12 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2023-11-28 20:46:17,769 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 34 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-28 20:46:17,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 31 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-28 20:46:17,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-28 20:46:17,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-11-28 20:46:17,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:17,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2023-11-28 20:46:17,795 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 37 [2023-11-28 20:46:17,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:46:17,796 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2023-11-28 20:46:17,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:17,796 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2023-11-28 20:46:17,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-28 20:46:17,796 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:46:17,796 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:46:17,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-28 20:46:17,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-28 20:46:17,997 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:46:17,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:46:17,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1707963945, now seen corresponding path program 16 times [2023-11-28 20:46:17,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:46:17,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495114240] [2023-11-28 20:46:17,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:46:17,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:46:18,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:46:25,741 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:46:25,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:46:25,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495114240] [2023-11-28 20:46:25,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495114240] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:46:25,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157746418] [2023-11-28 20:46:25,741 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 20:46:25,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:46:25,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:46:25,742 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:46:25,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-28 20:46:26,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 20:46:26,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:46:26,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 121 conjunts are in the unsatisfiable core [2023-11-28 20:46:26,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:46:26,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:46:26,278 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 23 treesize of output 1 [2023-11-28 20:46:26,404 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 35 treesize of output 15 [2023-11-28 20:46:26,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 29 [2023-11-28 20:46:26,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 43 [2023-11-28 20:46:26,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 57 [2023-11-28 20:46:27,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 71 [2023-11-28 20:46:27,878 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 11 treesize of output 7 [2023-11-28 20:46:28,142 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 19 treesize of output 18 [2023-11-28 20:46:28,416 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:46:28,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-28 20:46:28,712 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:46:28,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-11-28 20:46:28,974 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:46:28,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-11-28 20:46:29,331 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:46:29,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2023-11-28 20:46:30,315 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 29 treesize of output 17 [2023-11-28 20:46:30,599 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 33 treesize of output 21 [2023-11-28 20:46:30,909 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 39 treesize of output 27 [2023-11-28 20:46:31,284 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 44 treesize of output 32 [2023-11-28 20:46:31,630 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 49 treesize of output 37 [2023-11-28 20:46:31,963 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 54 treesize of output 42 [2023-11-28 20:46:31,974 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:46:31,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 80 treesize of output 32 [2023-11-28 20:46:32,460 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 25 treesize of output 13 [2023-11-28 20:46:32,693 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 25 treesize of output 13 [2023-11-28 20:46:32,918 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 25 treesize of output 13 [2023-11-28 20:46:33,160 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 25 treesize of output 13 [2023-11-28 20:46:33,387 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 25 treesize of output 13 [2023-11-28 20:46:33,594 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 25 treesize of output 13 [2023-11-28 20:46:33,754 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 15 treesize of output 7 [2023-11-28 20:46:33,872 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 15 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:46:33,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:46:38,182 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 374 treesize of output 362 [2023-11-28 20:46:38,337 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:46:38,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 4221952852093 treesize of output 4198330531965 [2023-11-28 20:46:48,176 WARN L293 SmtUtils]: Spent 9.83s on a formula simplification. DAG size of input: 1968 DAG size of output: 409 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 20:46:51,935 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:46:51,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157746418] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:46:51,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:46:51,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 93 [2023-11-28 20:46:51,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389540815] [2023-11-28 20:46:51,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:46:51,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2023-11-28 20:46:51,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:46:51,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2023-11-28 20:46:51,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=7475, Unknown=0, NotChecked=0, Total=8556 [2023-11-28 20:46:51,942 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 93 states, 93 states have (on average 1.10752688172043) internal successors, (103), 93 states have internal predecessors, (103), 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) [2023-11-28 20:47:19,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:47:19,933 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2023-11-28 20:47:19,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-11-28 20:47:19,933 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.10752688172043) internal successors, (103), 93 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-11-28 20:47:19,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:47:19,934 INFO L225 Difference]: With dead ends: 83 [2023-11-28 20:47:19,934 INFO L226 Difference]: Without dead ends: 77 [2023-11-28 20:47:19,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6979 ImplicationChecksByTransitivity, 38.1s TimeCoverageRelationStatistics Valid=2646, Invalid=17660, Unknown=0, NotChecked=0, Total=20306 [2023-11-28 20:47:19,936 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 102 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 1619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:47:19,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 150 Invalid, 1619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 1402 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-11-28 20:47:19,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-28 20:47:19,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 42. [2023-11-28 20:47:19,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:47:19,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2023-11-28 20:47:19,973 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 38 [2023-11-28 20:47:19,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:47:19,973 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2023-11-28 20:47:19,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.10752688172043) internal successors, (103), 93 states have internal predecessors, (103), 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) [2023-11-28 20:47:19,974 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2023-11-28 20:47:19,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-28 20:47:19,974 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:47:19,974 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:47:19,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-28 20:47:20,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-28 20:47:20,174 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:47:20,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:47:20,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1387198479, now seen corresponding path program 17 times [2023-11-28 20:47:20,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:47:20,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096143281] [2023-11-28 20:47:20,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:47:20,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:47:20,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:47:20,669 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-28 20:47:20,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:47:20,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096143281] [2023-11-28 20:47:20,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096143281] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:47:20,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414904990] [2023-11-28 20:47:20,669 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 20:47:20,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:47:20,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:47:20,670 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:47:20,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-28 20:47:21,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-28 20:47:21,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:47:21,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-28 20:47:21,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:47:21,976 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-28 20:47:21,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:47:22,369 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-28 20:47:22,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414904990] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:47:22,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:47:22,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-11-28 20:47:22,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347436787] [2023-11-28 20:47:22,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:47:22,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-28 20:47:22,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:47:22,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-28 20:47:22,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-11-28 20:47:22,371 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:47:23,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:47:23,072 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2023-11-28 20:47:23,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-28 20:47:23,073 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-28 20:47:23,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:47:23,074 INFO L225 Difference]: With dead ends: 97 [2023-11-28 20:47:23,074 INFO L226 Difference]: Without dead ends: 47 [2023-11-28 20:47:23,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 56 SyntacticMatches, 13 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2023-11-28 20:47:23,075 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 28 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-28 20:47:23,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 37 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-28 20:47:23,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-28 20:47:23,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2023-11-28 20:47:23,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 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) [2023-11-28 20:47:23,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2023-11-28 20:47:23,112 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 39 [2023-11-28 20:47:23,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:47:23,113 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2023-11-28 20:47:23,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:47:23,113 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2023-11-28 20:47:23,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-28 20:47:23,113 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:47:23,113 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:47:23,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-28 20:47:23,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:47:23,314 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:47:23,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:47:23,314 INFO L85 PathProgramCache]: Analyzing trace with hash -344113003, now seen corresponding path program 18 times [2023-11-28 20:47:23,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:47:23,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173586983] [2023-11-28 20:47:23,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:47:23,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:47:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:47:23,827 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-28 20:47:23,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:47:23,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173586983] [2023-11-28 20:47:23,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173586983] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:47:23,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084001169] [2023-11-28 20:47:23,827 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-28 20:47:23,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:47:23,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:47:23,828 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:47:23,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-28 20:47:24,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-28 20:47:24,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:47:24,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-28 20:47:24,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:47:24,948 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-28 20:47:24,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:47:25,381 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-28 20:47:25,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084001169] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:47:25,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:47:25,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-11-28 20:47:25,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141313193] [2023-11-28 20:47:25,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:47:25,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-28 20:47:25,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:47:25,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-28 20:47:25,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-11-28 20:47:25,384 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:47:25,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:47:25,987 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2023-11-28 20:47:25,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-28 20:47:25,988 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-11-28 20:47:25,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:47:25,989 INFO L225 Difference]: With dead ends: 47 [2023-11-28 20:47:25,989 INFO L226 Difference]: Without dead ends: 43 [2023-11-28 20:47:25,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 59 SyntacticMatches, 14 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2023-11-28 20:47:25,990 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 27 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 20:47:25,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 21 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 20:47:25,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-28 20:47:26,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-11-28 20:47:26,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:47:26,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2023-11-28 20:47:26,030 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 41 [2023-11-28 20:47:26,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:47:26,031 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2023-11-28 20:47:26,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:47:26,031 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2023-11-28 20:47:26,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-28 20:47:26,031 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:47:26,031 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:47:26,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-28 20:47:26,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-11-28 20:47:26,231 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:47:26,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:47:26,232 INFO L85 PathProgramCache]: Analyzing trace with hash -2057492237, now seen corresponding path program 19 times [2023-11-28 20:47:26,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:47:26,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009861142] [2023-11-28 20:47:26,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:47:26,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:47:26,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:47:36,734 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:47:36,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:47:36,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009861142] [2023-11-28 20:47:36,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009861142] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:47:36,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270365085] [2023-11-28 20:47:36,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-28 20:47:36,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:47:36,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:47:36,735 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:47:36,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_887ade7d-14fa-4a95-b074-daeed1d0a32a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-28 20:47:36,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:47:36,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 134 conjunts are in the unsatisfiable core [2023-11-28 20:47:36,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:47:36,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:47:37,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:47:37,174 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 23 treesize of output 11 [2023-11-28 20:47:37,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-28 20:47:37,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2023-11-28 20:47:37,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 41 [2023-11-28 20:47:37,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 51 [2023-11-28 20:47:38,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 61 [2023-11-28 20:47:38,717 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 11 treesize of output 7 [2023-11-28 20:47:38,969 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 19 treesize of output 18 [2023-11-28 20:47:39,214 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:47:39,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-28 20:47:39,497 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:47:39,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-11-28 20:47:39,800 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:47:39,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-11-28 20:47:40,153 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:47:40,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2023-11-28 20:47:40,449 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:47:40,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2023-11-28 20:47:41,349 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 29 treesize of output 17 [2023-11-28 20:47:41,743 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 33 treesize of output 21 [2023-11-28 20:47:42,076 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 39 treesize of output 27 [2023-11-28 20:47:42,449 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 44 treesize of output 32 [2023-11-28 20:47:42,940 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 49 treesize of output 37 [2023-11-28 20:47:43,361 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 54 treesize of output 42 [2023-11-28 20:47:43,712 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 59 treesize of output 47 [2023-11-28 20:47:43,724 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:47:43,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 92 treesize of output 36 [2023-11-28 20:47:44,351 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 25 treesize of output 13 [2023-11-28 20:47:44,593 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 25 treesize of output 13 [2023-11-28 20:47:44,842 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 25 treesize of output 13 [2023-11-28 20:47:45,149 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 25 treesize of output 13 [2023-11-28 20:47:45,418 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 25 treesize of output 13 [2023-11-28 20:47:45,670 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 25 treesize of output 13 [2023-11-28 20:47:45,950 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 25 treesize of output 13 [2023-11-28 20:47:46,099 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 15 treesize of output 7 [2023-11-28 20:47:46,248 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:47:46,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:47:52,000 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 491 treesize of output 477 [2023-11-28 20:47:52,297 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:47:52,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 39003368969904542 treesize of output 38889019760615838 [2023-11-28 20:48:02,864 WARN L293 SmtUtils]: Spent 10.55s on a formula simplification. DAG size of input: 4524 DAG size of output: 144 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 20:48:08,060 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 444 treesize of output 430