./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca11f6b-651a-4149-b373-c58320627f91/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca11f6b-651a-4149-b373-c58320627f91/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_4ca11f6b-651a-4149-b373-c58320627f91/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca11f6b-651a-4149-b373-c58320627f91/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca11f6b-651a-4149-b373-c58320627f91/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_4ca11f6b-651a-4149-b373-c58320627f91/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 7a78b2f82c5c523b03c70ba898547797b8578723f2b367d871b1e6ef867cb4b5 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:03:00,208 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:03:00,273 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca11f6b-651a-4149-b373-c58320627f91/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 02:03:00,279 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:03:00,279 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:03:00,307 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:03:00,308 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:03:00,308 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:03:00,309 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:03:00,309 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:03:00,310 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:03:00,310 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:03:00,311 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:03:00,312 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:03:00,312 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:03:00,313 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:03:00,313 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 02:03:00,314 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:03:00,314 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:03:00,315 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:03:00,316 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:03:00,319 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 02:03:00,320 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:03:00,320 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 02:03:00,320 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:03:00,321 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 02:03:00,321 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:03:00,322 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:03:00,322 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:03:00,322 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:03:00,323 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:03:00,323 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:03:00,323 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:03:00,324 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:03:00,324 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 02:03:00,324 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:03:00,324 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:03:00,324 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:03:00,325 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:03:00,325 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 02:03:00,325 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:03:00,326 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:03:00,326 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_4ca11f6b-651a-4149-b373-c58320627f91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca11f6b-651a-4149-b373-c58320627f91/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a78b2f82c5c523b03c70ba898547797b8578723f2b367d871b1e6ef867cb4b5 [2023-11-29 02:03:00,550 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:03:00,570 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:03:00,573 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:03:00,574 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:03:00,574 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:03:00,575 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca11f6b-651a-4149-b373-c58320627f91/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_3.i [2023-11-29 02:03:03,308 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:03:03,469 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:03:03,469 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca11f6b-651a-4149-b373-c58320627f91/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_3.i [2023-11-29 02:03:03,476 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca11f6b-651a-4149-b373-c58320627f91/bin/uautomizer-verify-BQ2R08f2Ya/data/f07623774/889ab804d31f4dbdba8ba3706d9e8cbb/FLAGbda2bf0d6 [2023-11-29 02:03:03,859 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca11f6b-651a-4149-b373-c58320627f91/bin/uautomizer-verify-BQ2R08f2Ya/data/f07623774/889ab804d31f4dbdba8ba3706d9e8cbb [2023-11-29 02:03:03,861 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:03:03,862 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:03:03,863 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:03:03,863 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:03:03,868 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:03:03,869 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:03:03" (1/1) ... [2023-11-29 02:03:03,870 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bdfe298 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:03:03, skipping insertion in model container [2023-11-29 02:03:03,870 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:03:03" (1/1) ... [2023-11-29 02:03:03,894 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:03:04,024 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_4ca11f6b-651a-4149-b373-c58320627f91/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_3.i[1898,1911] [2023-11-29 02:03:04,038 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:03:04,045 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:03:04,059 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_4ca11f6b-651a-4149-b373-c58320627f91/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_3.i[1898,1911] [2023-11-29 02:03:04,067 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:03:04,082 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:03:04,083 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:03:04 WrapperNode [2023-11-29 02:03:04,083 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:03:04,084 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:03:04,084 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:03:04,084 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:03:04,092 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:03:04" (1/1) ... [2023-11-29 02:03:04,100 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:03:04" (1/1) ... [2023-11-29 02:03:04,120 INFO L138 Inliner]: procedures = 18, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2023-11-29 02:03:04,121 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:03:04,122 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:03:04,122 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:03:04,122 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:03:04,133 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:03:04" (1/1) ... [2023-11-29 02:03:04,133 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:03:04" (1/1) ... [2023-11-29 02:03:04,136 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:03:04" (1/1) ... [2023-11-29 02:03:04,151 INFO L175 MemorySlicer]: Split 21 memory accesses to 4 slices as follows [2, 4, 3, 12]. 57 percent of accesses are in the largest equivalence class. The 4 initializations are split as follows [2, 1, 0, 1]. The 5 writes are split as follows [0, 1, 1, 3]. [2023-11-29 02:03:04,152 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:03:04" (1/1) ... [2023-11-29 02:03:04,152 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:03:04" (1/1) ... [2023-11-29 02:03:04,159 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:03:04" (1/1) ... [2023-11-29 02:03:04,160 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:03:04" (1/1) ... [2023-11-29 02:03:04,162 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:03:04" (1/1) ... [2023-11-29 02:03:04,163 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:03:04" (1/1) ... [2023-11-29 02:03:04,166 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:03:04,167 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:03:04,167 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:03:04,167 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:03:04,168 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:03:04" (1/1) ... [2023-11-29 02:03:04,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:03:04,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca11f6b-651a-4149-b373-c58320627f91/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:03:04,198 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca11f6b-651a-4149-b373-c58320627f91/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:03:04,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca11f6b-651a-4149-b373-c58320627f91/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:03:04,237 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:03:04,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 02:03:04,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 02:03:04,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 02:03:04,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 02:03:04,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 02:03:04,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 02:03:04,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 02:03:04,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 02:03:04,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 02:03:04,239 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_38_to_41_0 [2023-11-29 02:03:04,239 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_38_to_41_0 [2023-11-29 02:03:04,239 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_44_to_45_0 [2023-11-29 02:03:04,239 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_44_to_45_0 [2023-11-29 02:03:04,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:03:04,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:03:04,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 02:03:04,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 02:03:04,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 02:03:04,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 02:03:04,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 02:03:04,336 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:03:04,338 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:03:04,485 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:03:04,508 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:03:04,508 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-29 02:03:04,509 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:03:04 BoogieIcfgContainer [2023-11-29 02:03:04,509 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:03:04,512 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:03:04,512 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:03:04,516 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:03:04,516 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:03:03" (1/3) ... [2023-11-29 02:03:04,517 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ce2cb70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:03:04, skipping insertion in model container [2023-11-29 02:03:04,517 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:03:04" (2/3) ... [2023-11-29 02:03:04,517 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ce2cb70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:03:04, skipping insertion in model container [2023-11-29 02:03:04,517 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:03:04" (3/3) ... [2023-11-29 02:03:04,519 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_simple_array_index_value_3.i [2023-11-29 02:03:04,537 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:03:04,537 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 02:03:04,579 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:03:04,584 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;@2313dfe3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:03:04,584 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 02:03:04,587 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 17 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 02:03:04,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-29 02:03:04,593 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:03:04,593 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:03:04,594 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting func_to_recursive_line_44_to_45_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_44_to_45_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:03:04,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:03:04,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1199887809, now seen corresponding path program 1 times [2023-11-29 02:03:04,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:03:04,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424901771] [2023-11-29 02:03:04,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:03:04,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:03:04,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:03:05,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:03:05,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:03:05,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:03:05,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:03:05,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424901771] [2023-11-29 02:03:05,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424901771] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:03:05,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:03:05,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 02:03:05,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71526759] [2023-11-29 02:03:05,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:03:05,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:03:05,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:03:05,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:03:05,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:03:05,201 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 17 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 02:03:05,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:03:05,360 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2023-11-29 02:03:05,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:03:05,362 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-11-29 02:03:05,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:03:05,370 INFO L225 Difference]: With dead ends: 42 [2023-11-29 02:03:05,370 INFO L226 Difference]: Without dead ends: 20 [2023-11-29 02:03:05,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 02:03:05,377 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:03:05,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 19 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:03:05,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-29 02:03:05,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-29 02:03:05,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 15 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 02:03:05,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2023-11-29 02:03:05,411 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2023-11-29 02:03:05,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:03:05,412 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2023-11-29 02:03:05,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 02:03:05,412 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2023-11-29 02:03:05,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-29 02:03:05,414 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:03:05,414 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:03:05,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 02:03:05,414 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting func_to_recursive_line_44_to_45_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_44_to_45_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:03:05,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:03:05,415 INFO L85 PathProgramCache]: Analyzing trace with hash -658709991, now seen corresponding path program 1 times [2023-11-29 02:03:05,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:03:05,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166070974] [2023-11-29 02:03:05,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:03:05,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:03:05,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:03:05,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:03:05,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:03:05,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:03:06,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:03:06,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:03:06,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:03:06,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166070974] [2023-11-29 02:03:06,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166070974] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:03:06,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510762941] [2023-11-29 02:03:06,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:03:06,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:03:06,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca11f6b-651a-4149-b373-c58320627f91/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:03:06,074 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca11f6b-651a-4149-b373-c58320627f91/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:03:06,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca11f6b-651a-4149-b373-c58320627f91/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:03:06,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:03:06,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 02:03:06,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:03:06,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:03:06,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:03:07,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:03:07,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510762941] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:03:07,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:03:07,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 10] total 24 [2023-11-29 02:03:07,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860581237] [2023-11-29 02:03:07,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:03:07,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 02:03:07,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:03:07,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 02:03:07,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2023-11-29 02:03:07,011 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 25 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 02:03:07,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:03:07,564 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2023-11-29 02:03:07,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 02:03:07,565 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) Word has length 19 [2023-11-29 02:03:07,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:03:07,566 INFO L225 Difference]: With dead ends: 42 [2023-11-29 02:03:07,566 INFO L226 Difference]: Without dead ends: 31 [2023-11-29 02:03:07,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 02:03:07,569 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 31 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:03:07,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 38 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:03:07,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-29 02:03:07,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-11-29 02:03:07,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 20 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 02:03:07,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-11-29 02:03:07,578 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 19 [2023-11-29 02:03:07,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:03:07,579 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-11-29 02:03:07,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 02:03:07,579 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-11-29 02:03:07,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-29 02:03:07,580 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:03:07,581 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:03:07,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca11f6b-651a-4149-b373-c58320627f91/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 02:03:07,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca11f6b-651a-4149-b373-c58320627f91/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:03:07,782 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting func_to_recursive_line_44_to_45_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_44_to_45_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:03:07,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:03:07,782 INFO L85 PathProgramCache]: Analyzing trace with hash -60655971, now seen corresponding path program 2 times [2023-11-29 02:03:07,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:03:07,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424384705] [2023-11-29 02:03:07,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:03:07,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:03:07,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:03:08,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:03:08,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:03:09,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:03:09,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:03:10,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:03:10,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:03:10,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:03:10,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:03:10,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:03:10,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:03:10,706 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 02:03:10,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:03:10,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424384705] [2023-11-29 02:03:10,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424384705] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:03:10,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237062566] [2023-11-29 02:03:10,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:03:10,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:03:10,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca11f6b-651a-4149-b373-c58320627f91/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:03:10,712 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca11f6b-651a-4149-b373-c58320627f91/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:03:10,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca11f6b-651a-4149-b373-c58320627f91/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 02:03:10,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:03:10,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:03:10,891 WARN L260 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 177 conjunts are in the unsatisfiable core [2023-11-29 02:03:10,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:03:11,112 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 21 [2023-11-29 02:03:12,732 INFO L349 Elim1Store]: treesize reduction 447, result has 3.7 percent of original size [2023-11-29 02:03:12,732 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 3 case distinctions, treesize of input 123 treesize of output 25 [2023-11-29 02:03:12,877 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 7 treesize of output 3 [2023-11-29 02:03:12,933 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 [2023-11-29 02:03:13,423 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 02:03:13,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:03:20,813 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:03:20,814 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:03:20,815 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:03:20,817 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:03:20,818 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:03:20,820 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:03:20,823 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:03:20,919 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:03:20,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 0 select indices, 0 select index equivalence classes, 15 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 16 case distinctions, treesize of input 363 treesize of output 478 [2023-11-29 02:03:21,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 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 160 treesize of output 152 [2023-11-29 02:03:21,130 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:03:21,132 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:03:21,141 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:03:21,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 198 treesize of output 100 [2023-11-29 02:03:21,158 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:03:21,159 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:03:21,161 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:03:21,162 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:03:21,163 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:03:21,165 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:03:21,166 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:03:21,168 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:03:21,170 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:03:21,181 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:03:21,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 157 treesize of output 101 [2023-11-29 02:03:21,193 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:03:21,195 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:03:21,196 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:03:21,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 64 [2023-11-29 02:03:21,203 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 20 treesize of output 8 [2023-11-29 02:03:23,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237062566] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:03:23,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:03:23,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 35 [2023-11-29 02:03:23,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223453548] [2023-11-29 02:03:23,751 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:03:23,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-29 02:03:23,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:03:23,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-29 02:03:23,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 02:03:23,755 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 36 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 30 states have internal predecessors, (40), 11 states have call successors, (11), 6 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2023-11-29 02:03:33,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:03:33,997 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2023-11-29 02:03:33,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-29 02:03:33,998 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 30 states have internal predecessors, (40), 11 states have call successors, (11), 6 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) Word has length 34 [2023-11-29 02:03:33,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:03:34,000 INFO L225 Difference]: With dead ends: 90 [2023-11-29 02:03:34,000 INFO L226 Difference]: Without dead ends: 73 [2023-11-29 02:03:34,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=713, Invalid=5767, Unknown=0, NotChecked=0, Total=6480 [2023-11-29 02:03:34,003 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 134 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 1463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:03:34,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 190 Invalid, 1463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 1289 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-11-29 02:03:34,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-29 02:03:34,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 43. [2023-11-29 02:03:34,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 02:03:34,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2023-11-29 02:03:34,014 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 34 [2023-11-29 02:03:34,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:03:34,014 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2023-11-29 02:03:34,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 30 states have internal predecessors, (40), 11 states have call successors, (11), 6 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2023-11-29 02:03:34,015 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2023-11-29 02:03:34,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-29 02:03:34,016 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:03:34,016 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:03:34,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca11f6b-651a-4149-b373-c58320627f91/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 02:03:34,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca11f6b-651a-4149-b373-c58320627f91/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:03:34,217 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting func_to_recursive_line_44_to_45_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_44_to_45_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:03:34,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:03:34,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1365411467, now seen corresponding path program 3 times [2023-11-29 02:03:34,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:03:34,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890383825] [2023-11-29 02:03:34,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:03:34,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:03:34,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:03:34,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:03:34,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:03:35,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:03:35,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:03:36,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:03:36,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:03:36,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:03:36,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:03:36,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:03:36,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:03:36,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:03:36,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:03:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 02:03:36,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:03:36,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890383825] [2023-11-29 02:03:36,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890383825] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:03:36,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429951325] [2023-11-29 02:03:36,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:03:36,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:03:36,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca11f6b-651a-4149-b373-c58320627f91/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:03:36,988 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca11f6b-651a-4149-b373-c58320627f91/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:03:36,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca11f6b-651a-4149-b373-c58320627f91/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 02:03:38,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-29 02:03:38,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:03:38,598 WARN L260 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 198 conjunts are in the unsatisfiable core [2023-11-29 02:03:38,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:03:38,776 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 21 [2023-11-29 02:03:40,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:40,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:40,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:40,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:40,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:40,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:40,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:41,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:41,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:41,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:41,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 25 [2023-11-29 02:03:41,161 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 7 treesize of output 3 [2023-11-29 02:03:41,232 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 [2023-11-29 02:03:41,638 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 54 refuted. 4 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 02:03:41,638 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:04:00,489 WARN L293 SmtUtils]: Spent 11.64s on a formula simplification. DAG size of input: 130 DAG size of output: 128 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-11-29 02:04:10,034 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:10,035 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:10,037 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:10,039 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:10,040 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:10,048 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:10,051 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:10,053 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:10,054 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:10,056 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:10,058 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:10,060 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:10,061 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:10,065 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:10,066 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:10,068 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:10,366 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:04:10,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 8 stores, 0 select indices, 0 select index equivalence classes, 28 disjoint index pairs (out of 0 index pairs), introduced 8 new quantified variables, introduced 40 case distinctions, treesize of input 875 treesize of output 1288 [2023-11-29 02:04:10,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 7 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 256 treesize of output 327 [2023-11-29 02:04:11,118 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,119 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,132 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,133 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,138 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,141 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,142 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,149 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:04:11,149 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 161 treesize of output 82 [2023-11-29 02:04:11,215 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,217 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,218 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,219 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,220 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,222 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 312 treesize of output 172 [2023-11-29 02:04:11,273 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,275 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,276 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,280 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,281 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,294 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,297 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,300 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,302 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,304 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,321 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,322 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,334 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,340 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,354 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:04:11,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 161 treesize of output 103 [2023-11-29 02:04:11,386 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,386 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,387 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,388 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,393 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,394 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,395 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 249 treesize of output 136 [2023-11-29 02:04:11,421 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,422 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,424 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,425 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,428 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,431 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,432 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 282 treesize of output 157 [2023-11-29 02:04:11,449 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,450 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,453 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,454 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,455 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,456 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 218 treesize of output 119 [2023-11-29 02:04:11,472 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,473 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,474 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,481 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,482 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,483 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,485 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:04:11,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 152 treesize of output 83 [2023-11-29 02:04:11,492 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 20 treesize of output 8 [2023-11-29 02:04:21,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429951325] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:04:21,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:04:21,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 39 [2023-11-29 02:04:21,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105152009] [2023-11-29 02:04:21,838 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:04:21,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-29 02:04:21,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:04:21,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-29 02:04:21,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2107, Unknown=4, NotChecked=0, Total=2256 [2023-11-29 02:04:21,840 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 40 states, 30 states have (on average 1.5) internal successors, (45), 34 states have internal predecessors, (45), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (12), 12 states have call predecessors, (12), 10 states have call successors, (12) [2023-11-29 02:05:05,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:05:05,761 INFO L93 Difference]: Finished difference Result 113 states and 126 transitions. [2023-11-29 02:05:05,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-29 02:05:05,762 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 30 states have (on average 1.5) internal successors, (45), 34 states have internal predecessors, (45), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (12), 12 states have call predecessors, (12), 10 states have call successors, (12) Word has length 39 [2023-11-29 02:05:05,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:05:05,764 INFO L225 Difference]: With dead ends: 113 [2023-11-29 02:05:05,764 INFO L226 Difference]: Without dead ends: 90 [2023-11-29 02:05:05,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1599 ImplicationChecksByTransitivity, 32.2s TimeCoverageRelationStatistics Valid=979, Invalid=7927, Unknown=24, NotChecked=0, Total=8930 [2023-11-29 02:05:05,768 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 232 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 1446 mSolverCounterSat, 269 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 1718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1446 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:05:05,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 187 Invalid, 1718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1446 Invalid, 3 Unknown, 0 Unchecked, 17.1s Time] [2023-11-29 02:05:05,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-11-29 02:05:05,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 48. [2023-11-29 02:05:05,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 02:05:05,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2023-11-29 02:05:05,786 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 39 [2023-11-29 02:05:05,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:05:05,786 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2023-11-29 02:05:05,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 30 states have (on average 1.5) internal successors, (45), 34 states have internal predecessors, (45), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (12), 12 states have call predecessors, (12), 10 states have call successors, (12) [2023-11-29 02:05:05,786 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2023-11-29 02:05:05,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-29 02:05:05,788 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:05:05,788 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:05:05,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca11f6b-651a-4149-b373-c58320627f91/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 02:05:05,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca11f6b-651a-4149-b373-c58320627f91/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:05:05,989 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting func_to_recursive_line_44_to_45_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_44_to_45_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:05:05,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:05:05,989 INFO L85 PathProgramCache]: Analyzing trace with hash -304965493, now seen corresponding path program 4 times [2023-11-29 02:05:05,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:05:05,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624258929] [2023-11-29 02:05:05,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:05:05,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:05:06,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:07,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:05:07,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:07,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:05:07,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:08,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:05:08,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:09,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:05:09,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:09,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:05:09,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:09,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:05:09,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:09,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:05:09,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:09,701 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 02:05:09,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:05:09,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624258929] [2023-11-29 02:05:09,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624258929] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:05:09,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110545921] [2023-11-29 02:05:09,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:05:09,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:05:09,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca11f6b-651a-4149-b373-c58320627f91/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:05:09,702 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca11f6b-651a-4149-b373-c58320627f91/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:05:09,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca11f6b-651a-4149-b373-c58320627f91/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 02:05:09,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:05:09,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:05:09,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 105 conjunts are in the unsatisfiable core [2023-11-29 02:05:09,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:05:10,554 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-29 02:05:10,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:05:14,384 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:05:14,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110545921] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:05:14,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:05:14,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13, 29] total 63 [2023-11-29 02:05:14,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526189960] [2023-11-29 02:05:14,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:05:14,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-11-29 02:05:14,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:05:14,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-11-29 02:05:14,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=3643, Unknown=0, NotChecked=0, Total=4032 [2023-11-29 02:05:14,389 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 64 states, 48 states have (on average 1.3125) internal successors, (63), 54 states have internal predecessors, (63), 17 states have call successors, (17), 10 states have call predecessors, (17), 21 states have return successors, (21), 19 states have call predecessors, (21), 16 states have call successors, (21) [2023-11-29 02:05:23,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:05:23,899 INFO L93 Difference]: Finished difference Result 171 states and 191 transitions. [2023-11-29 02:05:23,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-29 02:05:23,899 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 48 states have (on average 1.3125) internal successors, (63), 54 states have internal predecessors, (63), 17 states have call successors, (17), 10 states have call predecessors, (17), 21 states have return successors, (21), 19 states have call predecessors, (21), 16 states have call successors, (21) Word has length 44 [2023-11-29 02:05:23,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:05:23,901 INFO L225 Difference]: With dead ends: 171 [2023-11-29 02:05:23,901 INFO L226 Difference]: Without dead ends: 106 [2023-11-29 02:05:23,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3019 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=1745, Invalid=11827, Unknown=0, NotChecked=0, Total=13572 [2023-11-29 02:05:23,905 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 220 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:05:23,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 202 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-29 02:05:23,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-11-29 02:05:23,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 64. [2023-11-29 02:05:23,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 38 states have (on average 1.131578947368421) internal successors, (43), 40 states have internal predecessors, (43), 10 states have call successors, (10), 8 states have call predecessors, (10), 15 states have return successors, (16), 15 states have call predecessors, (16), 8 states have call successors, (16) [2023-11-29 02:05:23,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2023-11-29 02:05:23,919 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 44 [2023-11-29 02:05:23,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:05:23,919 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2023-11-29 02:05:23,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 48 states have (on average 1.3125) internal successors, (63), 54 states have internal predecessors, (63), 17 states have call successors, (17), 10 states have call predecessors, (17), 21 states have return successors, (21), 19 states have call predecessors, (21), 16 states have call successors, (21) [2023-11-29 02:05:23,920 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2023-11-29 02:05:23,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-29 02:05:23,922 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:05:23,922 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:05:23,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca11f6b-651a-4149-b373-c58320627f91/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 02:05:24,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca11f6b-651a-4149-b373-c58320627f91/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:05:24,123 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting func_to_recursive_line_44_to_45_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_44_to_45_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:05:24,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:05:24,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1581847997, now seen corresponding path program 5 times [2023-11-29 02:05:24,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:05:24,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488241371] [2023-11-29 02:05:24,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:05:24,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:05:24,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:27,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 02:05:27,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:30,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:05:30,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:32,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:05:32,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:34,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:05:34,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:36,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:05:36,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:38,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:05:38,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:39,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:05:39,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:40,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:05:40,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:41,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:05:41,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:42,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:05:42,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:42,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:05:42,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:43,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:05:43,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:43,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:05:43,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:43,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:05:43,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:44,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 02:05:44,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:44,353 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-29 02:05:44,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:05:44,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488241371] [2023-11-29 02:05:44,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488241371] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:05:44,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250564243] [2023-11-29 02:05:44,354 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:05:44,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:05:44,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca11f6b-651a-4149-b373-c58320627f91/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:05:44,355 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca11f6b-651a-4149-b373-c58320627f91/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:05:44,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca11f6b-651a-4149-b373-c58320627f91/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process