./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_loop-simple/recursified_nested_5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursified_loop-simple/recursified_nested_5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu --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 c9dfd2bf12e8d041fe6d1d6bf651e6b1ba93f167a26b0485680374a443f598c5 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:50:36,519 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:50:36,610 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:50:36,615 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:50:36,616 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:50:36,643 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:50:36,644 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:50:36,645 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:50:36,646 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:50:36,646 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:50:36,647 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:50:36,648 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:50:36,649 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:50:36,650 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:50:36,650 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:50:36,651 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:50:36,652 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:50:36,652 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:50:36,653 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:50:36,654 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:50:36,654 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:50:36,655 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:50:36,656 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:50:36,656 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:50:36,657 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:50:36,657 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:50:36,658 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:50:36,658 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:50:36,659 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:50:36,660 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:50:36,660 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:50:36,661 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:50:36,661 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:50:36,661 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:50:36,662 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:50:36,662 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:50:36,662 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:50:36,663 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:50:36,663 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:50:36,663 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_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c9dfd2bf12e8d041fe6d1d6bf651e6b1ba93f167a26b0485680374a443f598c5 [2023-11-19 07:50:36,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:50:36,965 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:50:36,968 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:50:36,969 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:50:36,970 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:50:36,971 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/recursified_loop-simple/recursified_nested_5.c [2023-11-19 07:50:40,138 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:50:40,426 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:50:40,427 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/sv-benchmarks/c/recursified_loop-simple/recursified_nested_5.c [2023-11-19 07:50:40,438 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/data/a7624129c/f314878c5baa407d9960c010924cd167/FLAGa4a489497 [2023-11-19 07:50:40,462 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/data/a7624129c/f314878c5baa407d9960c010924cd167 [2023-11-19 07:50:40,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:50:40,474 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:50:40,478 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:50:40,478 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:50:40,484 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:50:40,485 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:50:40" (1/1) ... [2023-11-19 07:50:40,486 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4aaae256 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:40, skipping insertion in model container [2023-11-19 07:50:40,486 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:50:40" (1/1) ... [2023-11-19 07:50:40,521 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:50:40,755 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_df7d0f36-421c-40bf-a109-1f4181ad7d0b/sv-benchmarks/c/recursified_loop-simple/recursified_nested_5.c[2721,2734] [2023-11-19 07:50:40,763 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:50:40,778 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:50:40,825 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_df7d0f36-421c-40bf-a109-1f4181ad7d0b/sv-benchmarks/c/recursified_loop-simple/recursified_nested_5.c[2721,2734] [2023-11-19 07:50:40,829 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:50:40,846 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:50:40,847 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:40 WrapperNode [2023-11-19 07:50:40,847 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:50:40,849 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:50:40,850 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:50:40,850 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:50:40,859 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:40" (1/1) ... [2023-11-19 07:50:40,886 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:40" (1/1) ... [2023-11-19 07:50:40,914 INFO L138 Inliner]: procedures = 16, calls = 62, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2023-11-19 07:50:40,914 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:50:40,915 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:50:40,915 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:50:40,916 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:50:40,927 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:40" (1/1) ... [2023-11-19 07:50:40,927 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:40" (1/1) ... [2023-11-19 07:50:40,941 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:40" (1/1) ... [2023-11-19 07:50:40,941 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:40" (1/1) ... [2023-11-19 07:50:40,949 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:40" (1/1) ... [2023-11-19 07:50:40,952 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:40" (1/1) ... [2023-11-19 07:50:40,961 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:40" (1/1) ... [2023-11-19 07:50:40,963 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:40" (1/1) ... [2023-11-19 07:50:40,971 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:50:40,972 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:50:40,972 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:50:40,973 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:50:40,973 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:40" (1/1) ... [2023-11-19 07:50:40,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:50:40,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:41,007 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:50:41,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:50:41,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:50:41,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:50:41,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:50:41,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:50:41,051 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_24_to_25_0 [2023-11-19 07:50:41,051 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_24_to_25_0 [2023-11-19 07:50:41,051 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_23_to_24_0 [2023-11-19 07:50:41,051 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_23_to_24_0 [2023-11-19 07:50:41,052 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_25_to_26_0 [2023-11-19 07:50:41,052 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_25_to_26_0 [2023-11-19 07:50:41,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:50:41,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:50:41,052 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:50:41,052 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_27_to_27_0 [2023-11-19 07:50:41,053 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_27_to_27_0 [2023-11-19 07:50:41,053 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_26_to_27_0 [2023-11-19 07:50:41,053 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_26_to_27_0 [2023-11-19 07:50:41,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:50:41,145 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:50:41,147 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:50:41,469 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:50:41,482 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:50:41,483 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 07:50:41,495 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:50:41 BoogieIcfgContainer [2023-11-19 07:50:41,495 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:50:41,498 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:50:41,499 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:50:41,502 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:50:41,503 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:50:40" (1/3) ... [2023-11-19 07:50:41,503 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67e51ad3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:50:41, skipping insertion in model container [2023-11-19 07:50:41,504 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:40" (2/3) ... [2023-11-19 07:50:41,508 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67e51ad3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:50:41, skipping insertion in model container [2023-11-19 07:50:41,508 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:50:41" (3/3) ... [2023-11-19 07:50:41,510 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_nested_5.c [2023-11-19 07:50:41,533 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:50:41,534 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:50:41,589 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:50:41,596 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;@4861cb5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:50:41,597 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:50:41,601 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 40 states have internal predecessors, (45), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-19 07:50:41,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 07:50:41,612 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:41,613 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:41,614 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:41,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:41,620 INFO L85 PathProgramCache]: Analyzing trace with hash 370982842, now seen corresponding path program 1 times [2023-11-19 07:50:41,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:41,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219108348] [2023-11-19 07:50:41,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:41,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:41,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:42,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:42,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:42,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:42,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:42,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219108348] [2023-11-19 07:50:42,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219108348] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:42,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:42,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:50:42,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034383653] [2023-11-19 07:50:42,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:42,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:50:42,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:42,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:50:42,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:50:42,518 INFO L87 Difference]: Start difference. First operand has 51 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 40 states have internal predecessors, (45), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 07:50:42,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:42,787 INFO L93 Difference]: Finished difference Result 76 states and 99 transitions. [2023-11-19 07:50:42,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:50:42,790 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-11-19 07:50:42,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:42,801 INFO L225 Difference]: With dead ends: 76 [2023-11-19 07:50:42,801 INFO L226 Difference]: Without dead ends: 57 [2023-11-19 07:50:42,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:50:42,809 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 15 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:42,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 184 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:50:42,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-19 07:50:42,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2023-11-19 07:50:42,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.28125) internal successors, (41), 37 states have internal predecessors, (41), 10 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-11-19 07:50:42,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2023-11-19 07:50:42,892 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 17 [2023-11-19 07:50:42,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:42,893 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2023-11-19 07:50:42,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 07:50:42,894 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2023-11-19 07:50:42,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-19 07:50:42,899 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:42,899 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:42,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:50:42,900 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:42,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:42,903 INFO L85 PathProgramCache]: Analyzing trace with hash -485642250, now seen corresponding path program 1 times [2023-11-19 07:50:42,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:42,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902052427] [2023-11-19 07:50:42,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:42,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:42,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:43,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:43,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:43,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:43,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:43,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-19 07:50:43,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:43,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:50:43,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:43,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902052427] [2023-11-19 07:50:43,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902052427] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:43,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:43,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:50:43,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959663398] [2023-11-19 07:50:43,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:43,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:50:43,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:43,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:50:43,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:50:43,325 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:50:43,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:43,530 INFO L93 Difference]: Finished difference Result 103 states and 134 transitions. [2023-11-19 07:50:43,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:50:43,531 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2023-11-19 07:50:43,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:43,537 INFO L225 Difference]: With dead ends: 103 [2023-11-19 07:50:43,537 INFO L226 Difference]: Without dead ends: 57 [2023-11-19 07:50:43,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:50:43,546 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 15 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:43,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 168 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:50:43,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-19 07:50:43,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2023-11-19 07:50:43,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 38 states have internal predecessors, (42), 10 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2023-11-19 07:50:43,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2023-11-19 07:50:43,580 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 28 [2023-11-19 07:50:43,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:43,581 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2023-11-19 07:50:43,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:50:43,582 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2023-11-19 07:50:43,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-19 07:50:43,587 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:43,587 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:43,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:50:43,588 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:43,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:43,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1269279002, now seen corresponding path program 1 times [2023-11-19 07:50:43,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:43,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820407985] [2023-11-19 07:50:43,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:43,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:43,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:43,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:43,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:44,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:44,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:44,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:44,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:44,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-19 07:50:44,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:44,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-19 07:50:44,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:44,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:50:44,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:44,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820407985] [2023-11-19 07:50:44,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820407985] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:44,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:44,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:50:44,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811713367] [2023-11-19 07:50:44,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:44,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:50:44,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:44,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:50:44,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:50:44,212 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 1 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-19 07:50:44,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:44,359 INFO L93 Difference]: Finished difference Result 105 states and 137 transitions. [2023-11-19 07:50:44,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:50:44,360 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 1 states have call predecessors, (5), 3 states have call successors, (5) Word has length 39 [2023-11-19 07:50:44,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:44,362 INFO L225 Difference]: With dead ends: 105 [2023-11-19 07:50:44,362 INFO L226 Difference]: Without dead ends: 57 [2023-11-19 07:50:44,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:50:44,364 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 15 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:44,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 170 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:50:44,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-19 07:50:44,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2023-11-19 07:50:44,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 39 states have internal predecessors, (43), 10 states have call successors, (10), 5 states have call predecessors, (10), 8 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2023-11-19 07:50:44,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2023-11-19 07:50:44,378 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 39 [2023-11-19 07:50:44,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:44,379 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2023-11-19 07:50:44,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 1 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-19 07:50:44,379 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2023-11-19 07:50:44,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-19 07:50:44,385 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:44,386 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:44,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:50:44,387 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:44,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:44,387 INFO L85 PathProgramCache]: Analyzing trace with hash 457323246, now seen corresponding path program 1 times [2023-11-19 07:50:44,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:44,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19257412] [2023-11-19 07:50:44,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:44,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:44,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:44,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:44,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:44,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:44,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:44,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:44,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:44,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:44,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:44,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-19 07:50:44,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:44,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-19 07:50:44,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:44,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-19 07:50:44,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:44,935 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:50:44,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:44,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19257412] [2023-11-19 07:50:44,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19257412] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:44,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:44,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:50:44,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903828485] [2023-11-19 07:50:44,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:44,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:50:44,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:44,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:50:44,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:50:44,939 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-19 07:50:45,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:45,092 INFO L93 Difference]: Finished difference Result 107 states and 140 transitions. [2023-11-19 07:50:45,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:50:45,093 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 3 states have call successors, (7) Word has length 50 [2023-11-19 07:50:45,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:45,098 INFO L225 Difference]: With dead ends: 107 [2023-11-19 07:50:45,099 INFO L226 Difference]: Without dead ends: 57 [2023-11-19 07:50:45,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:50:45,110 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 15 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:45,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 172 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:50:45,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-19 07:50:45,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2023-11-19 07:50:45,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 40 states have internal predecessors, (44), 10 states have call successors, (10), 5 states have call predecessors, (10), 9 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2023-11-19 07:50:45,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2023-11-19 07:50:45,127 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 50 [2023-11-19 07:50:45,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:45,127 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2023-11-19 07:50:45,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-19 07:50:45,128 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2023-11-19 07:50:45,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-19 07:50:45,132 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:45,133 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:45,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:50:45,133 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:45,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:45,134 INFO L85 PathProgramCache]: Analyzing trace with hash -318248533, now seen corresponding path program 1 times [2023-11-19 07:50:45,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:45,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921506453] [2023-11-19 07:50:45,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:45,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:45,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:45,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:45,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:45,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:45,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:45,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:45,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:45,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:45,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:45,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:45,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:45,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-19 07:50:45,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:45,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-19 07:50:45,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:45,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-19 07:50:45,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:45,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-19 07:50:45,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:45,796 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 07:50:45,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:45,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921506453] [2023-11-19 07:50:45,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921506453] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:45,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:45,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:50:45,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3695609] [2023-11-19 07:50:45,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:45,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:50:45,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:45,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:50:45,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:50:45,809 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (9), 1 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 07:50:45,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:45,931 INFO L93 Difference]: Finished difference Result 109 states and 143 transitions. [2023-11-19 07:50:45,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:50:45,932 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (9), 1 states have call predecessors, (9), 3 states have call successors, (9) Word has length 61 [2023-11-19 07:50:45,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:45,935 INFO L225 Difference]: With dead ends: 109 [2023-11-19 07:50:45,935 INFO L226 Difference]: Without dead ends: 57 [2023-11-19 07:50:45,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:50:45,937 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 15 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:45,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 174 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:50:45,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-19 07:50:45,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-11-19 07:50:45,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 36 states have (on average 1.25) internal successors, (45), 41 states have internal predecessors, (45), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) [2023-11-19 07:50:45,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2023-11-19 07:50:45,960 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 61 [2023-11-19 07:50:45,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:45,962 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2023-11-19 07:50:45,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (9), 1 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 07:50:45,962 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2023-11-19 07:50:45,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-19 07:50:45,965 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:45,966 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:45,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:50:45,966 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:45,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:45,967 INFO L85 PathProgramCache]: Analyzing trace with hash 256012470, now seen corresponding path program 1 times [2023-11-19 07:50:45,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:45,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590963651] [2023-11-19 07:50:45,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:45,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:45,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:46,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:46,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:46,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:46,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:46,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:46,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:46,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:46,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:47,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:47,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:47,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:47,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:47,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-19 07:50:47,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:47,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-19 07:50:47,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:47,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-19 07:50:47,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:47,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-19 07:50:47,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:47,166 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 07:50:47,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:47,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590963651] [2023-11-19 07:50:47,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590963651] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:47,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144757990] [2023-11-19 07:50:47,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:47,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:47,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:47,170 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:47,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:50:47,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:47,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:50:47,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:47,425 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 07:50:47,425 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:50:47,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144757990] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:47,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:50:47,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2023-11-19 07:50:47,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412940209] [2023-11-19 07:50:47,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:47,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:50:47,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:47,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:50:47,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:50:47,428 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2023-11-19 07:50:47,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:47,466 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2023-11-19 07:50:47,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:50:47,467 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 66 [2023-11-19 07:50:47,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:47,469 INFO L225 Difference]: With dead ends: 70 [2023-11-19 07:50:47,469 INFO L226 Difference]: Without dead ends: 65 [2023-11-19 07:50:47,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:50:47,471 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 12 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:47,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 167 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:50:47,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-19 07:50:47,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2023-11-19 07:50:47,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 38 states have (on average 1.236842105263158) internal successors, (47), 43 states have internal predecessors, (47), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) [2023-11-19 07:50:47,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2023-11-19 07:50:47,490 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 66 [2023-11-19 07:50:47,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:47,491 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2023-11-19 07:50:47,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2023-11-19 07:50:47,492 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2023-11-19 07:50:47,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-19 07:50:47,493 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:47,494 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:47,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 07:50:47,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:47,716 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:47,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:47,716 INFO L85 PathProgramCache]: Analyzing trace with hash 257859512, now seen corresponding path program 1 times [2023-11-19 07:50:47,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:47,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126842044] [2023-11-19 07:50:47,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:47,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:47,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:48,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:48,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:48,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:48,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:48,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:48,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:48,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:48,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:48,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:48,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:48,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:48,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:48,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-19 07:50:48,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:48,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-19 07:50:48,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:48,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-19 07:50:48,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:48,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-19 07:50:48,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:48,885 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 07:50:48,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:48,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126842044] [2023-11-19 07:50:48,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126842044] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:48,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404124363] [2023-11-19 07:50:48,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:48,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:48,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:48,888 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:48,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:50:49,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:49,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:50:49,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:49,115 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 07:50:49,116 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:50:49,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404124363] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:49,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:50:49,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2023-11-19 07:50:49,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750685076] [2023-11-19 07:50:49,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:49,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:50:49,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:49,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:50:49,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:50:49,119 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2023-11-19 07:50:49,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:49,157 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2023-11-19 07:50:49,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:50:49,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 66 [2023-11-19 07:50:49,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:49,160 INFO L225 Difference]: With dead ends: 66 [2023-11-19 07:50:49,161 INFO L226 Difference]: Without dead ends: 63 [2023-11-19 07:50:49,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:50:49,162 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 3 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:49,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 166 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:50:49,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-19 07:50:49,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2023-11-19 07:50:49,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 40 states have (on average 1.225) internal successors, (49), 45 states have internal predecessors, (49), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) [2023-11-19 07:50:49,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2023-11-19 07:50:49,175 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 66 [2023-11-19 07:50:49,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:49,176 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2023-11-19 07:50:49,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2023-11-19 07:50:49,176 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2023-11-19 07:50:49,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-19 07:50:49,177 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:49,177 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:49,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:49,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:50:49,393 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:49,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:49,394 INFO L85 PathProgramCache]: Analyzing trace with hash 257861434, now seen corresponding path program 1 times [2023-11-19 07:50:49,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:49,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805663573] [2023-11-19 07:50:49,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:49,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:49,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:49,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:49,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:50,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:50,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:50,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:50,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:50,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:50,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:50,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:50,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:50,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:50,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:50,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-19 07:50:50,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:50,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-19 07:50:50,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:50,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-19 07:50:50,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:50,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-19 07:50:50,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:50,504 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 07:50:50,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:50,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805663573] [2023-11-19 07:50:50,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805663573] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:50,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530274636] [2023-11-19 07:50:50,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:50,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:50,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:50,506 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:50,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:50:50,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:50,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-19 07:50:50,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:50,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 07:50:50,911 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 07:50:50,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 07:50:52,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530274636] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:52,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:52,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 19 [2023-11-19 07:50:52,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905368627] [2023-11-19 07:50:52,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:52,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 07:50:52,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:52,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 07:50:52,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-11-19 07:50:52,059 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 19 states, 14 states have (on average 4.571428571428571) internal successors, (64), 16 states have internal predecessors, (64), 7 states have call successors, (25), 5 states have call predecessors, (25), 6 states have return successors, (18), 3 states have call predecessors, (18), 7 states have call successors, (18) [2023-11-19 07:50:52,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:52,502 INFO L93 Difference]: Finished difference Result 121 states and 155 transitions. [2023-11-19 07:50:52,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:50:52,503 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 14 states have (on average 4.571428571428571) internal successors, (64), 16 states have internal predecessors, (64), 7 states have call successors, (25), 5 states have call predecessors, (25), 6 states have return successors, (18), 3 states have call predecessors, (18), 7 states have call successors, (18) Word has length 66 [2023-11-19 07:50:52,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:52,505 INFO L225 Difference]: With dead ends: 121 [2023-11-19 07:50:52,505 INFO L226 Difference]: Without dead ends: 63 [2023-11-19 07:50:52,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 141 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2023-11-19 07:50:52,508 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 15 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:52,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 279 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:50:52,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-19 07:50:52,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-11-19 07:50:52,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 46 states have internal predecessors, (50), 10 states have call successors, (10), 5 states have call predecessors, (10), 11 states have return successors, (16), 11 states have call predecessors, (16), 10 states have call successors, (16) [2023-11-19 07:50:52,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2023-11-19 07:50:52,517 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 66 [2023-11-19 07:50:52,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:52,518 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2023-11-19 07:50:52,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 14 states have (on average 4.571428571428571) internal successors, (64), 16 states have internal predecessors, (64), 7 states have call successors, (25), 5 states have call predecessors, (25), 6 states have return successors, (18), 3 states have call predecessors, (18), 7 states have call successors, (18) [2023-11-19 07:50:52,518 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2023-11-19 07:50:52,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-19 07:50:52,519 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:52,520 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:52,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:52,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:52,733 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:52,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:52,734 INFO L85 PathProgramCache]: Analyzing trace with hash -102314523, now seen corresponding path program 2 times [2023-11-19 07:50:52,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:52,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762913208] [2023-11-19 07:50:52,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:52,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:52,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:53,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:53,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:53,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:53,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:53,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:53,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:53,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:54,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:54,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:54,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:54,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:54,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:54,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-11-19 07:50:54,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:54,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-19 07:50:54,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:54,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-19 07:50:54,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:54,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-11-19 07:50:54,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:54,358 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-19 07:50:54,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:54,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762913208] [2023-11-19 07:50:54,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762913208] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:54,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842155434] [2023-11-19 07:50:54,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:50:54,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:54,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:54,365 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:54,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:50:54,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:50:54,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:50:54,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 57 conjunts are in the unsatisfiable core [2023-11-19 07:50:54,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:54,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 07:50:54,931 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-19 07:50:54,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:56,696 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 07:50:56,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842155434] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:56,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:56,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 14] total 30 [2023-11-19 07:50:56,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685584872] [2023-11-19 07:50:56,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:56,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-19 07:50:56,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:56,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-19 07:50:56,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2023-11-19 07:50:56,701 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 30 states, 22 states have (on average 3.5) internal successors, (77), 26 states have internal predecessors, (77), 13 states have call successors, (31), 6 states have call predecessors, (31), 8 states have return successors, (25), 5 states have call predecessors, (25), 13 states have call successors, (25) [2023-11-19 07:50:57,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:57,295 INFO L93 Difference]: Finished difference Result 125 states and 159 transitions. [2023-11-19 07:50:57,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-19 07:50:57,296 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 22 states have (on average 3.5) internal successors, (77), 26 states have internal predecessors, (77), 13 states have call successors, (31), 6 states have call predecessors, (31), 8 states have return successors, (25), 5 states have call predecessors, (25), 13 states have call successors, (25) Word has length 71 [2023-11-19 07:50:57,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:57,297 INFO L225 Difference]: With dead ends: 125 [2023-11-19 07:50:57,297 INFO L226 Difference]: Without dead ends: 65 [2023-11-19 07:50:57,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 143 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=234, Invalid=1406, Unknown=0, NotChecked=0, Total=1640 [2023-11-19 07:50:57,299 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 57 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:57,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 321 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:50:57,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-19 07:50:57,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-11-19 07:50:57,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 47 states have internal predecessors, (51), 10 states have call successors, (10), 5 states have call predecessors, (10), 12 states have return successors, (17), 12 states have call predecessors, (17), 10 states have call successors, (17) [2023-11-19 07:50:57,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2023-11-19 07:50:57,312 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 71 [2023-11-19 07:50:57,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:57,312 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2023-11-19 07:50:57,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 22 states have (on average 3.5) internal successors, (77), 26 states have internal predecessors, (77), 13 states have call successors, (31), 6 states have call predecessors, (31), 8 states have return successors, (25), 5 states have call predecessors, (25), 13 states have call successors, (25) [2023-11-19 07:50:57,313 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2023-11-19 07:50:57,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-19 07:50:57,314 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:57,314 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:57,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-19 07:50:57,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:57,529 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:57,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:57,529 INFO L85 PathProgramCache]: Analyzing trace with hash -879772816, now seen corresponding path program 3 times [2023-11-19 07:50:57,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:57,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149544530] [2023-11-19 07:50:57,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:57,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:57,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:58,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:58,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:58,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:58,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:58,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:58,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:59,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:59,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:59,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:59,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:59,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:59,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:59,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:59,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:59,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:50:59,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:59,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-19 07:50:59,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:59,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-19 07:50:59,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:59,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-11-19 07:50:59,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:59,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-19 07:50:59,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:59,713 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 07:50:59,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:59,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149544530] [2023-11-19 07:50:59,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149544530] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:59,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426875697] [2023-11-19 07:50:59,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:50:59,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:59,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:59,716 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:59,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:51:00,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-11-19 07:51:00,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:51:00,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 79 conjunts are in the unsatisfiable core [2023-11-19 07:51:00,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:51:00,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 07:51:00,447 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 07:51:00,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:51:03,208 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 07:51:03,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426875697] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:51:03,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:51:03,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 18] total 38 [2023-11-19 07:51:03,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919474594] [2023-11-19 07:51:03,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:51:03,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-19 07:51:03,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:03,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-19 07:51:03,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1201, Unknown=0, NotChecked=0, Total=1406 [2023-11-19 07:51:03,213 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 38 states, 28 states have (on average 3.0) internal successors, (84), 33 states have internal predecessors, (84), 15 states have call successors, (33), 7 states have call predecessors, (33), 11 states have return successors, (28), 8 states have call predecessors, (28), 15 states have call successors, (28) [2023-11-19 07:51:04,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:51:04,405 INFO L93 Difference]: Finished difference Result 131 states and 166 transitions. [2023-11-19 07:51:04,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-19 07:51:04,406 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 28 states have (on average 3.0) internal successors, (84), 33 states have internal predecessors, (84), 15 states have call successors, (33), 7 states have call predecessors, (33), 11 states have return successors, (28), 8 states have call predecessors, (28), 15 states have call successors, (28) Word has length 76 [2023-11-19 07:51:04,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:51:04,407 INFO L225 Difference]: With dead ends: 131 [2023-11-19 07:51:04,407 INFO L226 Difference]: Without dead ends: 69 [2023-11-19 07:51:04,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 149 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=364, Invalid=2288, Unknown=0, NotChecked=0, Total=2652 [2023-11-19 07:51:04,409 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 53 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 07:51:04,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 622 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 07:51:04,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-19 07:51:04,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-11-19 07:51:04,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 49 states have internal predecessors, (53), 10 states have call successors, (10), 5 states have call predecessors, (10), 14 states have return successors, (19), 14 states have call predecessors, (19), 10 states have call successors, (19) [2023-11-19 07:51:04,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2023-11-19 07:51:04,417 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 76 [2023-11-19 07:51:04,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:51:04,417 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2023-11-19 07:51:04,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 28 states have (on average 3.0) internal successors, (84), 33 states have internal predecessors, (84), 15 states have call successors, (33), 7 states have call predecessors, (33), 11 states have return successors, (28), 8 states have call predecessors, (28), 15 states have call successors, (28) [2023-11-19 07:51:04,418 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2023-11-19 07:51:04,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-19 07:51:04,419 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:51:04,419 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:51:04,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:51:04,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:51:04,641 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:51:04,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:04,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1485749082, now seen corresponding path program 4 times [2023-11-19 07:51:04,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:04,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127633441] [2023-11-19 07:51:04,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:04,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:04,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:05,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:51:05,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:06,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:51:06,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:06,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:51:06,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:07,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:51:07,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:07,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:51:07,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:07,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:51:07,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:07,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:51:07,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:08,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:51:08,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:08,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:51:08,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:08,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:51:08,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:08,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-19 07:51:08,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:08,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-19 07:51:08,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:08,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-19 07:51:08,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:08,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-11-19 07:51:08,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:08,248 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 35 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-11-19 07:51:08,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:08,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127633441] [2023-11-19 07:51:08,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127633441] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:51:08,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711047626] [2023-11-19 07:51:08,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:51:08,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:08,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:51:08,253 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:51:08,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:51:08,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:51:08,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:51:08,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 75 conjunts are in the unsatisfiable core [2023-11-19 07:51:08,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:51:08,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 07:51:08,835 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 35 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-11-19 07:51:08,835 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:51:12,782 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 70 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 07:51:12,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711047626] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:51:12,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:51:12,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 26] total 38 [2023-11-19 07:51:12,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165172805] [2023-11-19 07:51:12,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:51:12,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-19 07:51:12,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:12,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-19 07:51:12,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1119, Unknown=0, NotChecked=0, Total=1406 [2023-11-19 07:51:12,787 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand has 38 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 31 states have internal predecessors, (79), 10 states have call successors, (29), 9 states have call predecessors, (29), 14 states have return successors, (29), 11 states have call predecessors, (29), 10 states have call successors, (29) [2023-11-19 07:51:13,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:51:13,515 INFO L93 Difference]: Finished difference Result 137 states and 171 transitions. [2023-11-19 07:51:13,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:51:13,516 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 31 states have internal predecessors, (79), 10 states have call successors, (29), 9 states have call predecessors, (29), 14 states have return successors, (29), 11 states have call predecessors, (29), 10 states have call successors, (29) Word has length 86 [2023-11-19 07:51:13,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:51:13,517 INFO L225 Difference]: With dead ends: 137 [2023-11-19 07:51:13,517 INFO L226 Difference]: Without dead ends: 71 [2023-11-19 07:51:13,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 173 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=390, Invalid=1416, Unknown=0, NotChecked=0, Total=1806 [2023-11-19 07:51:13,519 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 63 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 07:51:13,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 591 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 07:51:13,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-19 07:51:13,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2023-11-19 07:51:13,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 45 states have (on average 1.2) internal successors, (54), 50 states have internal predecessors, (54), 10 states have call successors, (10), 5 states have call predecessors, (10), 15 states have return successors, (20), 15 states have call predecessors, (20), 10 states have call successors, (20) [2023-11-19 07:51:13,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2023-11-19 07:51:13,526 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 86 [2023-11-19 07:51:13,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:51:13,527 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2023-11-19 07:51:13,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 31 states have internal predecessors, (79), 10 states have call successors, (29), 9 states have call predecessors, (29), 14 states have return successors, (29), 11 states have call predecessors, (29), 10 states have call successors, (29) [2023-11-19 07:51:13,527 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2023-11-19 07:51:13,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-19 07:51:13,529 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:51:13,529 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:51:13,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:51:13,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:13,745 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:51:13,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:13,745 INFO L85 PathProgramCache]: Analyzing trace with hash 631752785, now seen corresponding path program 5 times [2023-11-19 07:51:13,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:13,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375066391] [2023-11-19 07:51:13,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:13,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:14,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:51:14,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:15,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:51:15,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:15,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:51:15,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:16,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:51:16,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:16,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:51:16,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:16,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:51:16,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:17,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:51:17,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:17,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:51:17,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:17,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:51:17,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:17,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:51:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:17,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:51:17,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:17,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-19 07:51:17,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:17,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-19 07:51:17,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:17,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-11-19 07:51:17,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:17,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-11-19 07:51:17,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:17,608 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-11-19 07:51:17,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:17,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375066391] [2023-11-19 07:51:17,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375066391] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:51:17,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354001577] [2023-11-19 07:51:17,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:51:17,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:17,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:51:17,610 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:51:17,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7d0f36-421c-40bf-a109-1f4181ad7d0b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:51:18,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-11-19 07:51:18,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:51:18,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 146 conjunts are in the unsatisfiable core [2023-11-19 07:51:18,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:51:18,129 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 1670 treesize of output 1654 [2023-11-19 07:51:18,317 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 [2023-11-19 07:51:20,699 WARN L854 $PredicateComparison]: unable to prove that (or (= (store |c_old(#memory_int)| |c_func_to_recursive_line_27_to_27_0_#in~e.base| (select |c_#memory_int| |c_func_to_recursive_line_27_to_27_0_#in~e.base|)) |c_#memory_int|) (exists ((|v_#memory_int_BEFORE_CALL_55| (Array Int (Array Int Int)))) (let ((.cse0 (@diff |v_#memory_int_BEFORE_CALL_55| |c_#memory_int|))) (and (= (store |v_#memory_int_BEFORE_CALL_55| .cse0 (select |c_#memory_int| .cse0)) |c_#memory_int|) (= (store |c_old(#memory_int)| |c_func_to_recursive_line_27_to_27_0_#in~e.base| (select |v_#memory_int_BEFORE_CALL_55| |c_func_to_recursive_line_27_to_27_0_#in~e.base|)) |v_#memory_int_BEFORE_CALL_55|) (= .cse0 |c_func_to_recursive_line_27_to_27_0_#in~e.base|))))) is different from false [2023-11-19 07:51:22,704 WARN L876 $PredicateComparison]: unable to prove that (or (= (store |c_old(#memory_int)| |c_func_to_recursive_line_27_to_27_0_#in~e.base| (select |c_#memory_int| |c_func_to_recursive_line_27_to_27_0_#in~e.base|)) |c_#memory_int|) (exists ((|v_#memory_int_BEFORE_CALL_55| (Array Int (Array Int Int)))) (let ((.cse0 (@diff |v_#memory_int_BEFORE_CALL_55| |c_#memory_int|))) (and (= (store |v_#memory_int_BEFORE_CALL_55| .cse0 (select |c_#memory_int| .cse0)) |c_#memory_int|) (= (store |c_old(#memory_int)| |c_func_to_recursive_line_27_to_27_0_#in~e.base| (select |v_#memory_int_BEFORE_CALL_55| |c_func_to_recursive_line_27_to_27_0_#in~e.base|)) |v_#memory_int_BEFORE_CALL_55|) (= .cse0 |c_func_to_recursive_line_27_to_27_0_#in~e.base|))))) is different from true [2023-11-19 07:51:24,909 WARN L854 $PredicateComparison]: unable to prove that (and (= |c_func_to_recursive_line_26_to_27_0_#in~d.base| c_func_to_recursive_line_26_to_27_0_~d.base) (= c_func_to_recursive_line_26_to_27_0_~d.offset |c_func_to_recursive_line_26_to_27_0_#in~d.offset|) (or (= (store |c_old(#memory_int)| |c_func_to_recursive_line_26_to_27_0_#in~e.base| (select |c_#memory_int| |c_func_to_recursive_line_26_to_27_0_#in~e.base|)) |c_#memory_int|) (exists ((|v_#memory_int_BEFORE_CALL_60| (Array Int (Array Int Int)))) (let ((.cse0 (@diff |v_#memory_int_BEFORE_CALL_60| |c_#memory_int|))) (and (= (store |v_#memory_int_BEFORE_CALL_60| .cse0 (select |c_#memory_int| .cse0)) |c_#memory_int|) (= .cse0 |c_func_to_recursive_line_26_to_27_0_#in~e.base|) (= (store |c_old(#memory_int)| |c_func_to_recursive_line_26_to_27_0_#in~e.base| (select |v_#memory_int_BEFORE_CALL_60| |c_func_to_recursive_line_26_to_27_0_#in~e.base|)) |v_#memory_int_BEFORE_CALL_60|)))))) is different from false