./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursified_loop-simple/recursified_nested_5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows 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_6c174ea0-79b0-41f3-85fb-f1da96cfb6c1/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c174ea0-79b0-41f3-85fb-f1da96cfb6c1/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_6c174ea0-79b0-41f3-85fb-f1da96cfb6c1/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c174ea0-79b0-41f3-85fb-f1da96cfb6c1/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_6c174ea0-79b0-41f3-85fb-f1da96cfb6c1/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c174ea0-79b0-41f3-85fb-f1da96cfb6c1/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --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 07:42:04,373 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:42:04,446 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c174ea0-79b0-41f3-85fb-f1da96cfb6c1/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-19 07:42:04,452 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:42:04,452 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:42:04,479 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:42:04,480 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:42:04,481 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:42:04,482 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:42:04,482 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:42:04,483 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:42:04,484 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:42:04,484 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:42:04,485 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:42:04,486 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:42:04,486 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:42:04,487 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:42:04,487 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:42:04,488 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:42:04,488 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:42:04,489 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:42:04,489 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:42:04,490 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-19 07:42:04,490 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:42:04,490 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:42:04,491 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:42:04,491 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:42:04,492 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:42:04,492 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:42:04,493 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:42:04,493 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:42:04,494 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:42:04,494 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:42:04,494 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:42:04,495 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:42:04,495 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:42:04,495 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:42:04,495 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:42:04,496 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:42:04,496 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:42:04,496 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:42:04,497 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_6c174ea0-79b0-41f3-85fb-f1da96cfb6c1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c174ea0-79b0-41f3-85fb-f1da96cfb6c1/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c9dfd2bf12e8d041fe6d1d6bf651e6b1ba93f167a26b0485680374a443f598c5 [2023-11-19 07:42:04,838 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:42:04,884 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:42:04,887 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:42:04,888 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:42:04,889 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:42:04,890 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c174ea0-79b0-41f3-85fb-f1da96cfb6c1/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/recursified_loop-simple/recursified_nested_5.c [2023-11-19 07:42:08,228 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:42:08,571 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:42:08,573 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c174ea0-79b0-41f3-85fb-f1da96cfb6c1/sv-benchmarks/c/recursified_loop-simple/recursified_nested_5.c [2023-11-19 07:42:08,587 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c174ea0-79b0-41f3-85fb-f1da96cfb6c1/bin/uautomizer-verify-uCwYo4JHxu/data/302dfa80e/23e52b39476c48b482b9eb5ed5899034/FLAGd5e83a396 [2023-11-19 07:42:08,870 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c174ea0-79b0-41f3-85fb-f1da96cfb6c1/bin/uautomizer-verify-uCwYo4JHxu/data/302dfa80e/23e52b39476c48b482b9eb5ed5899034 [2023-11-19 07:42:08,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:42:08,875 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:42:08,876 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:42:08,876 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:42:08,882 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:42:08,883 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:42:08" (1/1) ... [2023-11-19 07:42:08,884 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fbce790 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:08, skipping insertion in model container [2023-11-19 07:42:08,885 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:42:08" (1/1) ... [2023-11-19 07:42:08,921 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:42:09,111 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:42:09,122 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:42:09,147 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:42:09,162 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:42:09,163 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:09 WrapperNode [2023-11-19 07:42:09,163 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:42:09,164 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:42:09,165 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:42:09,165 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:42:09,174 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:09" (1/1) ... [2023-11-19 07:42:09,182 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:09" (1/1) ... [2023-11-19 07:42:09,204 INFO L138 Inliner]: procedures = 16, calls = 63, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 81 [2023-11-19 07:42:09,204 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:42:09,205 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:42:09,206 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:42:09,206 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:42:09,216 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:09" (1/1) ... [2023-11-19 07:42:09,217 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:09" (1/1) ... [2023-11-19 07:42:09,220 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:09" (1/1) ... [2023-11-19 07:42:09,221 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:09" (1/1) ... [2023-11-19 07:42:09,229 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:09" (1/1) ... [2023-11-19 07:42:09,232 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:09" (1/1) ... [2023-11-19 07:42:09,241 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:09" (1/1) ... [2023-11-19 07:42:09,243 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:09" (1/1) ... [2023-11-19 07:42:09,248 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:42:09,254 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:42:09,255 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:42:09,255 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:42:09,256 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:09" (1/1) ... [2023-11-19 07:42:09,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:42:09,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c174ea0-79b0-41f3-85fb-f1da96cfb6c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:09,302 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c174ea0-79b0-41f3-85fb-f1da96cfb6c1/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:42:09,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c174ea0-79b0-41f3-85fb-f1da96cfb6c1/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:42:09,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:42:09,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:42:09,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:42:09,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:42:09,360 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_24_to_25_0 [2023-11-19 07:42:09,360 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_24_to_25_0 [2023-11-19 07:42:09,361 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_23_to_24_0 [2023-11-19 07:42:09,361 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_23_to_24_0 [2023-11-19 07:42:09,361 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_25_to_26_0 [2023-11-19 07:42:09,361 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_25_to_26_0 [2023-11-19 07:42:09,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:42:09,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:42:09,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:42:09,362 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_27_to_27_0 [2023-11-19 07:42:09,362 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_27_to_27_0 [2023-11-19 07:42:09,362 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_26_to_27_0 [2023-11-19 07:42:09,362 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_26_to_27_0 [2023-11-19 07:42:09,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:42:09,451 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:42:09,454 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:42:09,875 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:42:09,885 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:42:09,885 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 07:42:09,889 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:42:09 BoogieIcfgContainer [2023-11-19 07:42:09,889 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:42:09,892 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:42:09,893 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:42:09,896 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:42:09,897 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:42:08" (1/3) ... [2023-11-19 07:42:09,898 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71bca4f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:42:09, skipping insertion in model container [2023-11-19 07:42:09,898 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:09" (2/3) ... [2023-11-19 07:42:09,899 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71bca4f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:42:09, skipping insertion in model container [2023-11-19 07:42:09,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:42:09" (3/3) ... [2023-11-19 07:42:09,900 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_nested_5.c [2023-11-19 07:42:09,922 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:42:09,923 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-19 07:42:09,979 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:42:09,986 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;@50257436, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:42:09,987 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-11-19 07:42:09,992 INFO L276 IsEmpty]: Start isEmpty. Operand has 70 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 59 states have internal predecessors, (64), 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 07:42:10,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 07:42:10,001 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:10,002 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:10,002 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting func_to_recursive_line_23_to_24_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_24_to_25_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_24_to_25_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 8 more)] === [2023-11-19 07:42:10,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:10,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1223239567, now seen corresponding path program 1 times [2023-11-19 07:42:10,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:10,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136224515] [2023-11-19 07:42:10,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:10,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:10,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:10,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-19 07:42:10,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:10,817 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 07:42:10,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:10,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136224515] [2023-11-19 07:42:10,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136224515] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:10,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:10,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:42:10,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043210470] [2023-11-19 07:42:10,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:10,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:42:10,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:10,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:42:10,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:42:10,866 INFO L87 Difference]: Start difference. First operand has 70 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 59 states have internal predecessors, (64), 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 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 07:42:11,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:11,091 INFO L93 Difference]: Finished difference Result 146 states and 180 transitions. [2023-11-19 07:42:11,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:42:11,094 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-11-19 07:42:11,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:11,105 INFO L225 Difference]: With dead ends: 146 [2023-11-19 07:42:11,105 INFO L226 Difference]: Without dead ends: 62 [2023-11-19 07:42:11,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 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 07:42:11,114 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 19 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:42:11,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 260 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:42:11,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-19 07:42:11,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2023-11-19 07:42:11,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 45 states have internal predecessors, (45), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-11-19 07:42:11,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2023-11-19 07:42:11,174 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 12 [2023-11-19 07:42:11,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:11,175 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2023-11-19 07:42:11,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 07:42:11,175 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2023-11-19 07:42:11,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 07:42:11,177 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:11,178 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:11,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:42:11,178 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting func_to_recursive_line_24_to_25_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_24_to_25_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_24_to_25_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 8 more)] === [2023-11-19 07:42:11,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:11,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1367942481, now seen corresponding path program 1 times [2023-11-19 07:42:11,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:11,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922807363] [2023-11-19 07:42:11,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:11,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:11,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:11,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-19 07:42:11,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:11,439 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 07:42:11,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:11,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922807363] [2023-11-19 07:42:11,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922807363] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:11,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:11,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:42:11,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38808544] [2023-11-19 07:42:11,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:11,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:42:11,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:11,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:42:11,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:42:11,446 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 07:42:11,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:11,635 INFO L93 Difference]: Finished difference Result 115 states and 136 transitions. [2023-11-19 07:42:11,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:42:11,636 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-11-19 07:42:11,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:11,639 INFO L225 Difference]: With dead ends: 115 [2023-11-19 07:42:11,639 INFO L226 Difference]: Without dead ends: 62 [2023-11-19 07:42:11,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 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 07:42:11,651 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 17 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:42:11,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 177 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:42:11,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-19 07:42:11,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2023-11-19 07:42:11,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 32 states have (on average 1.4375) internal successors, (46), 46 states have internal predecessors, (46), 10 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2023-11-19 07:42:11,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2023-11-19 07:42:11,672 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 15 [2023-11-19 07:42:11,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:11,672 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2023-11-19 07:42:11,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 07:42:11,673 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2023-11-19 07:42:11,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 07:42:11,674 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:11,674 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:11,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:42:11,675 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting func_to_recursive_line_27_to_27_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_24_to_25_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_24_to_25_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 8 more)] === [2023-11-19 07:42:11,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:11,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1730834936, now seen corresponding path program 1 times [2023-11-19 07:42:11,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:11,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352538060] [2023-11-19 07:42:11,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:11,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:11,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:11,986 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 07:42:11,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:11,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352538060] [2023-11-19 07:42:11,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352538060] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:11,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:11,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:42:11,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757976981] [2023-11-19 07:42:11,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:11,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:42:11,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:11,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:42:11,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:42:11,998 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:12,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:12,123 INFO L93 Difference]: Finished difference Result 118 states and 143 transitions. [2023-11-19 07:42:12,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:42:12,124 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-19 07:42:12,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:12,125 INFO L225 Difference]: With dead ends: 118 [2023-11-19 07:42:12,126 INFO L226 Difference]: Without dead ends: 63 [2023-11-19 07:42:12,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 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 07:42:12,128 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 6 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:42:12,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 226 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:42:12,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-19 07:42:12,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2023-11-19 07:42:12,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 35 states have (on average 1.4) internal successors, (49), 48 states have internal predecessors, (49), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2023-11-19 07:42:12,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2023-11-19 07:42:12,139 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 18 [2023-11-19 07:42:12,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:12,139 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2023-11-19 07:42:12,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:12,140 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2023-11-19 07:42:12,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 07:42:12,141 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:12,141 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:12,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:42:12,141 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting func_to_recursive_line_25_to_26_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_24_to_25_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_24_to_25_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 8 more)] === [2023-11-19 07:42:12,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:12,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1738673911, now seen corresponding path program 1 times [2023-11-19 07:42:12,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:12,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945485462] [2023-11-19 07:42:12,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:12,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:12,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:12,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-19 07:42:12,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:12,340 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 07:42:12,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:12,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945485462] [2023-11-19 07:42:12,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945485462] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:12,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:12,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:42:12,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222845271] [2023-11-19 07:42:12,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:12,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:42:12,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:12,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:42:12,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:42:12,343 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 07:42:12,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:12,509 INFO L93 Difference]: Finished difference Result 123 states and 144 transitions. [2023-11-19 07:42:12,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:42:12,510 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-11-19 07:42:12,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:12,511 INFO L225 Difference]: With dead ends: 123 [2023-11-19 07:42:12,511 INFO L226 Difference]: Without dead ends: 65 [2023-11-19 07:42:12,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 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 07:42:12,513 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 17 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:42:12,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 181 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:42:12,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-19 07:42:12,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-11-19 07:42:12,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 50 states have internal predecessors, (51), 10 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2023-11-19 07:42:12,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2023-11-19 07:42:12,523 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 18 [2023-11-19 07:42:12,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:12,524 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2023-11-19 07:42:12,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 07:42:12,524 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2023-11-19 07:42:12,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 07:42:12,525 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:12,526 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:12,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:42:12,526 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting func_to_recursive_line_27_to_27_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_24_to_25_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_24_to_25_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 8 more)] === [2023-11-19 07:42:12,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:12,527 INFO L85 PathProgramCache]: Analyzing trace with hash 2116275590, now seen corresponding path program 1 times [2023-11-19 07:42:12,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:12,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815832131] [2023-11-19 07:42:12,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:12,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:12,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:12,599 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 07:42:12,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:12,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815832131] [2023-11-19 07:42:12,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815832131] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:12,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:12,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:42:12,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216322502] [2023-11-19 07:42:12,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:12,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:42:12,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:12,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:42:12,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:42:12,602 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:12,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:12,650 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2023-11-19 07:42:12,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:42:12,651 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-19 07:42:12,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:12,653 INFO L225 Difference]: With dead ends: 65 [2023-11-19 07:42:12,653 INFO L226 Difference]: Without dead ends: 64 [2023-11-19 07:42:12,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:42:12,657 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 1 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:42:12,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 149 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:42:12,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-19 07:42:12,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-11-19 07:42:12,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 49 states have internal predecessors, (50), 10 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2023-11-19 07:42:12,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2023-11-19 07:42:12,672 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 19 [2023-11-19 07:42:12,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:12,672 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2023-11-19 07:42:12,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:12,673 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2023-11-19 07:42:12,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-19 07:42:12,673 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:12,674 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] [2023-11-19 07:42:12,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:42:12,674 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting func_to_recursive_line_27_to_27_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_24_to_25_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_24_to_25_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 8 more)] === [2023-11-19 07:42:12,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:12,675 INFO L85 PathProgramCache]: Analyzing trace with hash 86022206, now seen corresponding path program 1 times [2023-11-19 07:42:12,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:12,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788652531] [2023-11-19 07:42:12,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:12,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:12,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:12,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:42:12,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:12,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788652531] [2023-11-19 07:42:12,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788652531] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:12,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:12,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:42:12,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162880927] [2023-11-19 07:42:12,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:12,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:42:12,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:12,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:42:12,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:42:12,996 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 7 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:13,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:13,142 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2023-11-19 07:42:13,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:42:13,143 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-19 07:42:13,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:13,147 INFO L225 Difference]: With dead ends: 68 [2023-11-19 07:42:13,147 INFO L226 Difference]: Without dead ends: 67 [2023-11-19 07:42:13,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:42:13,150 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 11 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:42:13,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 217 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:42:13,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-19 07:42:13,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2023-11-19 07:42:13,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 47 states have internal predecessors, (48), 10 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2023-11-19 07:42:13,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2023-11-19 07:42:13,176 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 23 [2023-11-19 07:42:13,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:13,176 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2023-11-19 07:42:13,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:13,177 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2023-11-19 07:42:13,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-19 07:42:13,178 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:13,178 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 07:42:13,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:42:13,178 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting func_to_recursive_line_26_to_27_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_24_to_25_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_24_to_25_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 8 more)] === [2023-11-19 07:42:13,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:13,179 INFO L85 PathProgramCache]: Analyzing trace with hash -2135863641, now seen corresponding path program 1 times [2023-11-19 07:42:13,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:13,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184009069] [2023-11-19 07:42:13,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:13,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:13,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:13,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-19 07:42:13,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:13,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-19 07:42:13,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:13,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:42:13,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:13,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184009069] [2023-11-19 07:42:13,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184009069] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:42:13,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974222057] [2023-11-19 07:42:13,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:13,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:13,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c174ea0-79b0-41f3-85fb-f1da96cfb6c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:13,834 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c174ea0-79b0-41f3-85fb-f1da96cfb6c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:13,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c174ea0-79b0-41f3-85fb-f1da96cfb6c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:42:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:14,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-19 07:42:14,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:14,109 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 07:42:14,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:42:14,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:42:14,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:42:14,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974222057] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:42:14,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:42:14,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 24 [2023-11-19 07:42:14,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135068894] [2023-11-19 07:42:14,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:42:14,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-19 07:42:14,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:14,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-19 07:42:14,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2023-11-19 07:42:14,982 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 24 states, 19 states have (on average 1.894736842105263) internal successors, (36), 21 states have internal predecessors, (36), 6 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 07:42:15,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:15,493 INFO L93 Difference]: Finished difference Result 125 states and 149 transitions. [2023-11-19 07:42:15,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:42:15,494 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 1.894736842105263) internal successors, (36), 21 states have internal predecessors, (36), 6 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 28 [2023-11-19 07:42:15,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:15,496 INFO L225 Difference]: With dead ends: 125 [2023-11-19 07:42:15,496 INFO L226 Difference]: Without dead ends: 66 [2023-11-19 07:42:15,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2023-11-19 07:42:15,498 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 16 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:42:15,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 326 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:42:15,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-19 07:42:15,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2023-11-19 07:42:15,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 49 states have internal predecessors, (50), 10 states have call successors, (10), 6 states have call predecessors, (10), 10 states have return successors, (14), 10 states have call predecessors, (14), 8 states have call successors, (14) [2023-11-19 07:42:15,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2023-11-19 07:42:15,507 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 28 [2023-11-19 07:42:15,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:15,508 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2023-11-19 07:42:15,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 1.894736842105263) internal successors, (36), 21 states have internal predecessors, (36), 6 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 07:42:15,508 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2023-11-19 07:42:15,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-19 07:42:15,510 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:15,510 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:15,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c174ea0-79b0-41f3-85fb-f1da96cfb6c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:15,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c174ea0-79b0-41f3-85fb-f1da96cfb6c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:15,732 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting func_to_recursive_line_26_to_27_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_24_to_25_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_24_to_25_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 8 more)] === [2023-11-19 07:42:15,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:15,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1536927397, now seen corresponding path program 2 times [2023-11-19 07:42:15,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:15,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786044382] [2023-11-19 07:42:15,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:15,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:15,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:16,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-19 07:42:16,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:16,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-19 07:42:16,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:16,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-19 07:42:16,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:17,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-19 07:42:17,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:17,101 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 07:42:17,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:17,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786044382] [2023-11-19 07:42:17,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786044382] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:42:17,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916436873] [2023-11-19 07:42:17,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:42:17,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:17,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c174ea0-79b0-41f3-85fb-f1da96cfb6c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:17,103 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c174ea0-79b0-41f3-85fb-f1da96cfb6c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:17,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c174ea0-79b0-41f3-85fb-f1da96cfb6c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:42:17,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:42:17,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:42:17,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 94 conjunts are in the unsatisfiable core [2023-11-19 07:42:17,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:17,498 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 07:42:17,631 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-19 07:42:17,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-11-19 07:42:18,024 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-19 07:42:18,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2023-11-19 07:42:18,125 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:42:18,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2023-11-19 07:42:18,167 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-19 07:42:18,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:42:18,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916436873] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:42:18,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:42:18,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20] total 33 [2023-11-19 07:42:18,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252150655] [2023-11-19 07:42:18,623 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:42:18,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-19 07:42:18,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:18,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-19 07:42:18,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1150, Unknown=1, NotChecked=0, Total=1260 [2023-11-19 07:42:18,625 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand has 33 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 27 states have internal predecessors, (45), 10 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-19 07:42:19,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:19,862 INFO L93 Difference]: Finished difference Result 140 states and 166 transitions. [2023-11-19 07:42:19,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-19 07:42:19,863 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 27 states have internal predecessors, (45), 10 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 42 [2023-11-19 07:42:19,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:19,866 INFO L225 Difference]: With dead ends: 140 [2023-11-19 07:42:19,866 INFO L226 Difference]: Without dead ends: 75 [2023-11-19 07:42:19,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=256, Invalid=2935, Unknown=1, NotChecked=0, Total=3192 [2023-11-19 07:42:19,870 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 91 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 07:42:19,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 574 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 07:42:19,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-19 07:42:19,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2023-11-19 07:42:19,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 53 states have internal predecessors, (55), 11 states have call successors, (11), 7 states have call predecessors, (11), 11 states have return successors, (16), 12 states have call predecessors, (16), 9 states have call successors, (16) [2023-11-19 07:42:19,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2023-11-19 07:42:19,887 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 42 [2023-11-19 07:42:19,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:19,887 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2023-11-19 07:42:19,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 27 states have internal predecessors, (45), 10 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-19 07:42:19,888 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2023-11-19 07:42:19,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-19 07:42:19,893 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:19,893 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:19,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c174ea0-79b0-41f3-85fb-f1da96cfb6c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:20,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c174ea0-79b0-41f3-85fb-f1da96cfb6c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 07:42:20,113 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting func_to_recursive_line_26_to_27_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_24_to_25_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_24_to_25_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 8 more)] === [2023-11-19 07:42:20,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:20,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1155601437, now seen corresponding path program 1 times [2023-11-19 07:42:20,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:20,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026776998] [2023-11-19 07:42:20,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:20,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:20,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:20,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-19 07:42:20,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:21,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-19 07:42:21,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:21,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-19 07:42:21,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:21,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-19 07:42:21,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:21,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-19 07:42:21,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:22,006 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-19 07:42:22,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:22,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026776998] [2023-11-19 07:42:22,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026776998] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:42:22,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818705053] [2023-11-19 07:42:22,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:22,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:22,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c174ea0-79b0-41f3-85fb-f1da96cfb6c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:22,009 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c174ea0-79b0-41f3-85fb-f1da96cfb6c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:22,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c174ea0-79b0-41f3-85fb-f1da96cfb6c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:42:22,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:22,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 70 conjunts are in the unsatisfiable core [2023-11-19 07:42:22,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:22,180 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 07:42:22,723 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-19 07:42:22,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:42:25,325 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:42:25,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818705053] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:42:25,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:42:25,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 26] total 44 [2023-11-19 07:42:25,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360422951] [2023-11-19 07:42:25,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:42:25,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-19 07:42:25,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:25,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-19 07:42:25,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1541, Unknown=0, NotChecked=0, Total=1892 [2023-11-19 07:42:25,329 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand has 44 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 38 states have internal predecessors, (58), 10 states have call successors, (13), 7 states have call predecessors, (13), 11 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) [2023-11-19 07:42:26,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:26,157 INFO L93 Difference]: Finished difference Result 147 states and 175 transitions. [2023-11-19 07:42:26,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:42:26,159 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 38 states have internal predecessors, (58), 10 states have call successors, (13), 7 states have call predecessors, (13), 11 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) Word has length 50 [2023-11-19 07:42:26,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:26,160 INFO L225 Difference]: With dead ends: 147 [2023-11-19 07:42:26,160 INFO L226 Difference]: Without dead ends: 77 [2023-11-19 07:42:26,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 78 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=510, Invalid=2142, Unknown=0, NotChecked=0, Total=2652 [2023-11-19 07:42:26,162 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 46 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:42:26,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 535 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:42:26,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-19 07:42:26,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2023-11-19 07:42:26,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 55 states have internal predecessors, (57), 11 states have call successors, (11), 7 states have call predecessors, (11), 13 states have return successors, (18), 14 states have call predecessors, (18), 9 states have call successors, (18) [2023-11-19 07:42:26,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2023-11-19 07:42:26,172 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 50 [2023-11-19 07:42:26,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:26,172 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2023-11-19 07:42:26,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 38 states have internal predecessors, (58), 10 states have call successors, (13), 7 states have call predecessors, (13), 11 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) [2023-11-19 07:42:26,173 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2023-11-19 07:42:26,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-19 07:42:26,174 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:26,174 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:26,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c174ea0-79b0-41f3-85fb-f1da96cfb6c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:26,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c174ea0-79b0-41f3-85fb-f1da96cfb6c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-19 07:42:26,375 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting func_to_recursive_line_26_to_27_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_24_to_25_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_24_to_25_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 8 more)] === [2023-11-19 07:42:26,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:26,375 INFO L85 PathProgramCache]: Analyzing trace with hash -794833755, now seen corresponding path program 2 times [2023-11-19 07:42:26,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:26,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52305872] [2023-11-19 07:42:26,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:26,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:26,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:27,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-19 07:42:27,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:27,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-19 07:42:27,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:27,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-19 07:42:27,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:28,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-19 07:42:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:28,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-19 07:42:28,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:28,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-19 07:42:28,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:28,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-19 07:42:28,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:28,675 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2023-11-19 07:42:28,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:28,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52305872] [2023-11-19 07:42:28,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52305872] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:42:28,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054981760] [2023-11-19 07:42:28,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:42:28,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:28,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c174ea0-79b0-41f3-85fb-f1da96cfb6c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:28,681 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c174ea0-79b0-41f3-85fb-f1da96cfb6c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:28,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c174ea0-79b0-41f3-85fb-f1da96cfb6c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:42:28,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:42:28,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:42:28,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 89 conjunts are in the unsatisfiable core [2023-11-19 07:42:28,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:28,927 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 6710 treesize of output 6646 [2023-11-19 07:42:28,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 07:42:29,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-19 07:42:31,274 WARN L854 $PredicateComparison]: unable to prove that (or (exists ((|v_#memory_int_BEFORE_CALL_42| (Array Int (Array Int Int)))) (let ((.cse0 (@diff |v_#memory_int_BEFORE_CALL_42| |c_#memory_int|))) (and (= (store |c_old(#memory_int)| |c_func_to_recursive_line_27_to_27_0_#in~e.base| (select |v_#memory_int_BEFORE_CALL_42| |c_func_to_recursive_line_27_to_27_0_#in~e.base|)) |v_#memory_int_BEFORE_CALL_42|) (= |c_#memory_int| (store |v_#memory_int_BEFORE_CALL_42| .cse0 (select |c_#memory_int| .cse0))) (= .cse0 |c_func_to_recursive_line_27_to_27_0_#in~e.base|)))) (= (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|)) is different from false [2023-11-19 07:42:33,277 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((|v_#memory_int_BEFORE_CALL_42| (Array Int (Array Int Int)))) (let ((.cse0 (@diff |v_#memory_int_BEFORE_CALL_42| |c_#memory_int|))) (and (= (store |c_old(#memory_int)| |c_func_to_recursive_line_27_to_27_0_#in~e.base| (select |v_#memory_int_BEFORE_CALL_42| |c_func_to_recursive_line_27_to_27_0_#in~e.base|)) |v_#memory_int_BEFORE_CALL_42|) (= |c_#memory_int| (store |v_#memory_int_BEFORE_CALL_42| .cse0 (select |c_#memory_int| .cse0))) (= .cse0 |c_func_to_recursive_line_27_to_27_0_#in~e.base|)))) (= (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|)) is different from true [2023-11-19 07:42:35,387 WARN L854 $PredicateComparison]: unable to prove that (or (exists ((|v_old(#memory_int)_AFTER_CALL_25| (Array Int (Array Int Int)))) (let ((.cse0 (@diff |v_old(#memory_int)_AFTER_CALL_25| |c_#memory_int|))) (and (= (store |v_old(#memory_int)_AFTER_CALL_25| .cse0 (select |c_#memory_int| .cse0)) |c_#memory_int|) (= |v_old(#memory_int)_AFTER_CALL_25| (store |c_old(#memory_int)| |c_func_to_recursive_line_27_to_27_0_#in~e.base| (select |v_old(#memory_int)_AFTER_CALL_25| |c_func_to_recursive_line_27_to_27_0_#in~e.base|))) (= .cse0 |c_func_to_recursive_line_27_to_27_0_#in~e.base|)))) (= (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|)) is different from false [2023-11-19 07:42:37,389 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((|v_old(#memory_int)_AFTER_CALL_25| (Array Int (Array Int Int)))) (let ((.cse0 (@diff |v_old(#memory_int)_AFTER_CALL_25| |c_#memory_int|))) (and (= (store |v_old(#memory_int)_AFTER_CALL_25| .cse0 (select |c_#memory_int| .cse0)) |c_#memory_int|) (= |v_old(#memory_int)_AFTER_CALL_25| (store |c_old(#memory_int)| |c_func_to_recursive_line_27_to_27_0_#in~e.base| (select |v_old(#memory_int)_AFTER_CALL_25| |c_func_to_recursive_line_27_to_27_0_#in~e.base|))) (= .cse0 |c_func_to_recursive_line_27_to_27_0_#in~e.base|)))) (= (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|)) is different from true [2023-11-19 07:42:37,465 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 97 trivial. 11 not checked. [2023-11-19 07:42:37,466 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:42:37,704 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_539 (Array Int Int))) (< (select (select (store |c_#memory_int| c_func_to_recursive_line_26_to_27_0_~e.base v_ArrVal_539) c_func_to_recursive_line_26_to_27_0_~d.base) c_func_to_recursive_line_26_to_27_0_~d.offset) 2147483647)) is different from false [2023-11-19 07:42:37,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054981760] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:42:37,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:42:37,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 20 [2023-11-19 07:42:37,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967510714] [2023-11-19 07:42:37,706 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:42:37,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-19 07:42:37,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:37,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 07:42:37,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=370, Unknown=5, NotChecked=120, Total=552 [2023-11-19 07:42:37,708 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 21 states, 17 states have (on average 1.588235294117647) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-19 07:42:40,030 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (= (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|))) (and (= (store |c_old(#memory_int)| c_func_to_recursive_line_27_to_27_0_~e.base (select |c_#memory_int| c_func_to_recursive_line_27_to_27_0_~e.base)) |c_#memory_int|) (or (exists ((|v_old(#memory_int)_AFTER_CALL_25| (Array Int (Array Int Int)))) (let ((.cse0 (@diff |v_old(#memory_int)_AFTER_CALL_25| |c_#memory_int|))) (and (= (store |v_old(#memory_int)_AFTER_CALL_25| .cse0 (select |c_#memory_int| .cse0)) |c_#memory_int|) (= |v_old(#memory_int)_AFTER_CALL_25| (store |c_old(#memory_int)| |c_func_to_recursive_line_27_to_27_0_#in~e.base| (select |v_old(#memory_int)_AFTER_CALL_25| |c_func_to_recursive_line_27_to_27_0_#in~e.base|))) (= .cse0 |c_func_to_recursive_line_27_to_27_0_#in~e.base|)))) .cse1) (= |c_func_to_recursive_line_27_to_27_0_#in~e.base| c_func_to_recursive_line_27_to_27_0_~e.base) (or (exists ((|v_#memory_int_BEFORE_CALL_42| (Array Int (Array Int Int)))) (let ((.cse2 (@diff |v_#memory_int_BEFORE_CALL_42| |c_#memory_int|))) (and (= (store |c_old(#memory_int)| |c_func_to_recursive_line_27_to_27_0_#in~e.base| (select |v_#memory_int_BEFORE_CALL_42| |c_func_to_recursive_line_27_to_27_0_#in~e.base|)) |v_#memory_int_BEFORE_CALL_42|) (= |c_#memory_int| (store |v_#memory_int_BEFORE_CALL_42| .cse2 (select |c_#memory_int| .cse2))) (= .cse2 |c_func_to_recursive_line_27_to_27_0_#in~e.base|)))) .cse1))) is different from false [2023-11-19 07:42:42,033 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse1 (= (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|))) (and (= (store |c_old(#memory_int)| c_func_to_recursive_line_27_to_27_0_~e.base (select |c_#memory_int| c_func_to_recursive_line_27_to_27_0_~e.base)) |c_#memory_int|) (or (exists ((|v_old(#memory_int)_AFTER_CALL_25| (Array Int (Array Int Int)))) (let ((.cse0 (@diff |v_old(#memory_int)_AFTER_CALL_25| |c_#memory_int|))) (and (= (store |v_old(#memory_int)_AFTER_CALL_25| .cse0 (select |c_#memory_int| .cse0)) |c_#memory_int|) (= |v_old(#memory_int)_AFTER_CALL_25| (store |c_old(#memory_int)| |c_func_to_recursive_line_27_to_27_0_#in~e.base| (select |v_old(#memory_int)_AFTER_CALL_25| |c_func_to_recursive_line_27_to_27_0_#in~e.base|))) (= .cse0 |c_func_to_recursive_line_27_to_27_0_#in~e.base|)))) .cse1) (= |c_func_to_recursive_line_27_to_27_0_#in~e.base| c_func_to_recursive_line_27_to_27_0_~e.base) (or (exists ((|v_#memory_int_BEFORE_CALL_42| (Array Int (Array Int Int)))) (let ((.cse2 (@diff |v_#memory_int_BEFORE_CALL_42| |c_#memory_int|))) (and (= (store |c_old(#memory_int)| |c_func_to_recursive_line_27_to_27_0_#in~e.base| (select |v_#memory_int_BEFORE_CALL_42| |c_func_to_recursive_line_27_to_27_0_#in~e.base|)) |v_#memory_int_BEFORE_CALL_42|) (= |c_#memory_int| (store |v_#memory_int_BEFORE_CALL_42| .cse2 (select |c_#memory_int| .cse2))) (= .cse2 |c_func_to_recursive_line_27_to_27_0_#in~e.base|)))) .cse1))) is different from true [2023-11-19 07:42:42,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:42,242 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2023-11-19 07:42:42,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-19 07:42:42,242 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.588235294117647) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 64 [2023-11-19 07:42:42,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:42,244 INFO L225 Difference]: With dead ends: 79 [2023-11-19 07:42:42,244 INFO L226 Difference]: Without dead ends: 78 [2023-11-19 07:42:42,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 79 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=145, Invalid=1054, Unknown=7, NotChecked=276, Total=1482 [2023-11-19 07:42:42,245 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 75 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:42:42,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 421 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 403 Invalid, 0 Unknown, 163 Unchecked, 0.3s Time] [2023-11-19 07:42:42,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-19 07:42:42,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2023-11-19 07:42:42,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 56 states have internal predecessors, (58), 11 states have call successors, (11), 7 states have call predecessors, (11), 13 states have return successors, (18), 14 states have call predecessors, (18), 9 states have call successors, (18) [2023-11-19 07:42:42,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2023-11-19 07:42:42,255 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 64 [2023-11-19 07:42:42,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:42,256 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2023-11-19 07:42:42,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.588235294117647) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-19 07:42:42,256 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2023-11-19 07:42:42,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-19 07:42:42,258 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:42,258 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 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] [2023-11-19 07:42:42,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c174ea0-79b0-41f3-85fb-f1da96cfb6c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:42,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c174ea0-79b0-41f3-85fb-f1da96cfb6c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:42:42,473 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting func_to_recursive_line_25_to_26_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_24_to_25_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_24_to_25_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 8 more)] === [2023-11-19 07:42:42,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:42,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1342117996, now seen corresponding path program 1 times [2023-11-19 07:42:42,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:42,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609431752] [2023-11-19 07:42:42,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:42,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:42,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:43,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-19 07:42:43,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:43,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:42:43,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:44,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-19 07:42:44,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:44,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-19 07:42:44,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:44,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-19 07:42:44,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:44,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-19 07:42:44,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:44,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-19 07:42:44,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:44,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-19 07:42:44,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:44,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-19 07:42:44,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:44,894 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-11-19 07:42:44,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:44,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609431752] [2023-11-19 07:42:44,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609431752] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:42:44,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133785342] [2023-11-19 07:42:44,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:44,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:44,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c174ea0-79b0-41f3-85fb-f1da96cfb6c1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:44,896 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c174ea0-79b0-41f3-85fb-f1da96cfb6c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:44,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c174ea0-79b0-41f3-85fb-f1da96cfb6c1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:42:45,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:45,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 106 conjunts are in the unsatisfiable core [2023-11-19 07:42:45,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:45,117 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 2058 treesize of output 1994 [2023-11-19 07:42:45,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 07:42:47,370 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 07:42:49,371 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 07:42:51,519 WARN L854 $PredicateComparison]: unable to prove that (or (exists ((|v_#memory_int_BEFORE_CALL_58| (Array Int (Array Int Int)))) (let ((.cse0 (@diff |v_#memory_int_BEFORE_CALL_58| |c_#memory_int|))) (and (= (store |c_old(#memory_int)| |c_func_to_recursive_line_27_to_27_0_#in~e.base| (select |v_#memory_int_BEFORE_CALL_58| |c_func_to_recursive_line_27_to_27_0_#in~e.base|)) |v_#memory_int_BEFORE_CALL_58|) (= .cse0 |c_func_to_recursive_line_27_to_27_0_#in~e.base|) (= (store |v_#memory_int_BEFORE_CALL_58| .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 |c_#memory_int| |c_func_to_recursive_line_27_to_27_0_#in~e.base|)) |c_#memory_int|)) is different from false [2023-11-19 07:42:53,521 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((|v_#memory_int_BEFORE_CALL_58| (Array Int (Array Int Int)))) (let ((.cse0 (@diff |v_#memory_int_BEFORE_CALL_58| |c_#memory_int|))) (and (= (store |c_old(#memory_int)| |c_func_to_recursive_line_27_to_27_0_#in~e.base| (select |v_#memory_int_BEFORE_CALL_58| |c_func_to_recursive_line_27_to_27_0_#in~e.base|)) |v_#memory_int_BEFORE_CALL_58|) (= .cse0 |c_func_to_recursive_line_27_to_27_0_#in~e.base|) (= (store |v_#memory_int_BEFORE_CALL_58| .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 |c_#memory_int| |c_func_to_recursive_line_27_to_27_0_#in~e.base|)) |c_#memory_int|)) is different from true [2023-11-19 07:42:55,611 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 [2023-11-19 07:42:57,612 WARN L876 $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 true [2023-11-19 07:42:57,935 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 98 trivial. 11 not checked. [2023-11-19 07:42:57,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:42:58,384 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_710 (Array Int Int))) (< (select (select (store |c_#memory_int| c_func_to_recursive_line_25_to_26_0_~e.base v_ArrVal_710) c_func_to_recursive_line_25_to_26_0_~d.base) c_func_to_recursive_line_25_to_26_0_~d.offset) 5)) is different from false [2023-11-19 07:42:58,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133785342] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:42:58,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:42:58,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 31 [2023-11-19 07:42:58,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575740291] [2023-11-19 07:42:58,386 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:42:58,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-19 07:42:58,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:58,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-19 07:42:58,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=671, Unknown=8, NotChecked=220, Total=992 [2023-11-19 07:42:58,389 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand has 31 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 10 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11)