./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf627ef1-4637-4679-a2be-2a7aabefe409/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf627ef1-4637-4679-a2be-2a7aabefe409/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf627ef1-4637-4679-a2be-2a7aabefe409/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf627ef1-4637-4679-a2be-2a7aabefe409/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf627ef1-4637-4679-a2be-2a7aabefe409/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf627ef1-4637-4679-a2be-2a7aabefe409/bin/uautomizer-verify-aQ6SnzHsRB --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 4ff641574c5c4b41213c0a7618630c50b2b820c3ae0c2511bc348b3db9b6781b --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 19:50:29,600 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 19:50:29,685 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf627ef1-4637-4679-a2be-2a7aabefe409/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Overflow-32bit-Automizer_Default.epf [2024-11-27 19:50:29,690 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 19:50:29,690 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 19:50:29,714 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 19:50:29,715 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 19:50:29,715 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 19:50:29,716 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 19:50:29,716 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 19:50:29,716 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 19:50:29,716 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 19:50:29,716 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 19:50:29,717 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 19:50:29,717 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 19:50:29,717 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 19:50:29,717 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 19:50:29,717 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 19:50:29,717 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 19:50:29,717 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 19:50:29,717 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 19:50:29,717 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 19:50:29,717 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 19:50:29,718 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 19:50:29,718 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-11-27 19:50:29,718 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-27 19:50:29,718 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 19:50:29,718 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 19:50:29,718 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 19:50:29,718 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 19:50:29,718 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 19:50:29,718 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 19:50:29,718 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 19:50:29,718 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 19:50:29,719 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:50:29,719 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 19:50:29,719 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 19:50:29,719 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 19:50:29,720 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 19:50:29,720 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:50:29,720 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 19:50:29,720 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 19:50:29,720 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 19:50:29,720 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 19:50:29,721 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 19:50:29,721 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 19:50:29,721 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 19:50:29,721 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 19:50:29,721 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 19:50:29,721 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 19:50:29,721 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_bf627ef1-4637-4679-a2be-2a7aabefe409/bin/uautomizer-verify-aQ6SnzHsRB 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 -> 4ff641574c5c4b41213c0a7618630c50b2b820c3ae0c2511bc348b3db9b6781b [2024-11-27 19:50:30,002 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 19:50:30,010 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 19:50:30,013 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 19:50:30,014 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 19:50:30,014 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 19:50:30,016 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf627ef1-4637-4679-a2be-2a7aabefe409/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd2.c [2024-11-27 19:50:33,238 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf627ef1-4637-4679-a2be-2a7aabefe409/bin/uautomizer-verify-aQ6SnzHsRB/data/80f6fe198/20904362f3584ada8a7561e675cca724/FLAG1990dddb4 [2024-11-27 19:50:33,605 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 19:50:33,609 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf627ef1-4637-4679-a2be-2a7aabefe409/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd2.c [2024-11-27 19:50:33,624 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf627ef1-4637-4679-a2be-2a7aabefe409/bin/uautomizer-verify-aQ6SnzHsRB/data/80f6fe198/20904362f3584ada8a7561e675cca724/FLAG1990dddb4 [2024-11-27 19:50:33,649 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf627ef1-4637-4679-a2be-2a7aabefe409/bin/uautomizer-verify-aQ6SnzHsRB/data/80f6fe198/20904362f3584ada8a7561e675cca724 [2024-11-27 19:50:33,653 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 19:50:33,655 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 19:50:33,658 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 19:50:33,659 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 19:50:33,665 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 19:50:33,666 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 07:50:33" (1/1) ... [2024-11-27 19:50:33,669 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bd0b60a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:33, skipping insertion in model container [2024-11-27 19:50:33,669 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 07:50:33" (1/1) ... [2024-11-27 19:50:33,700 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 19:50:33,945 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 19:50:33,964 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 19:50:34,021 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 19:50:34,049 INFO L204 MainTranslator]: Completed translation [2024-11-27 19:50:34,049 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:34 WrapperNode [2024-11-27 19:50:34,049 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 19:50:34,051 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 19:50:34,051 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 19:50:34,051 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 19:50:34,061 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:34" (1/1) ... [2024-11-27 19:50:34,072 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:34" (1/1) ... [2024-11-27 19:50:34,112 INFO L138 Inliner]: procedures = 17, calls = 136, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 137 [2024-11-27 19:50:34,112 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 19:50:34,113 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 19:50:34,113 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 19:50:34,113 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 19:50:34,124 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:34" (1/1) ... [2024-11-27 19:50:34,124 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:34" (1/1) ... [2024-11-27 19:50:34,128 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:34" (1/1) ... [2024-11-27 19:50:34,155 INFO L175 MemorySlicer]: Split 88 memory accesses to 12 slices as follows [2, 5, 7, 8, 8, 5, 10, 8, 7, 9, 12, 7]. 14 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 0, 0, 8, 0, 0, 0, 0, 0, 0, 0, 0]. The 20 writes are split as follows [0, 2, 2, 0, 2, 2, 2, 2, 3, 1, 1, 3]. [2024-11-27 19:50:34,156 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:34" (1/1) ... [2024-11-27 19:50:34,156 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:34" (1/1) ... [2024-11-27 19:50:34,167 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:34" (1/1) ... [2024-11-27 19:50:34,168 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:34" (1/1) ... [2024-11-27 19:50:34,170 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:34" (1/1) ... [2024-11-27 19:50:34,173 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:34" (1/1) ... [2024-11-27 19:50:34,174 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:34" (1/1) ... [2024-11-27 19:50:34,178 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 19:50:34,179 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 19:50:34,179 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 19:50:34,179 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 19:50:34,181 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:34" (1/1) ... [2024-11-27 19:50:34,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:50:34,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf627ef1-4637-4679-a2be-2a7aabefe409/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:50:34,218 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf627ef1-4637-4679-a2be-2a7aabefe409/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 19:50:34,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf627ef1-4637-4679-a2be-2a7aabefe409/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 19:50:34,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 19:50:34,255 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-27 19:50:34,256 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-27 19:50:34,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 19:50:34,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-27 19:50:34,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-27 19:50:34,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-27 19:50:34,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-27 19:50:34,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-11-27 19:50:34,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-11-27 19:50:34,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-11-27 19:50:34,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2024-11-27 19:50:34,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2024-11-27 19:50:34,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2024-11-27 19:50:34,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2024-11-27 19:50:34,259 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_34_to_60_0 [2024-11-27 19:50:34,259 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_34_to_60_0 [2024-11-27 19:50:34,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-27 19:50:34,259 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_40_to_48_0 [2024-11-27 19:50:34,259 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_40_to_48_0 [2024-11-27 19:50:34,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-27 19:50:34,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-27 19:50:34,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-27 19:50:34,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-27 19:50:34,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-27 19:50:34,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-11-27 19:50:34,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-11-27 19:50:34,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-11-27 19:50:34,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2024-11-27 19:50:34,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#9 [2024-11-27 19:50:34,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#10 [2024-11-27 19:50:34,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#11 [2024-11-27 19:50:34,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 19:50:34,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 19:50:34,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-27 19:50:34,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-27 19:50:34,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-27 19:50:34,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-27 19:50:34,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-27 19:50:34,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-11-27 19:50:34,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-11-27 19:50:34,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-11-27 19:50:34,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2024-11-27 19:50:34,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#9 [2024-11-27 19:50:34,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#10 [2024-11-27 19:50:34,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#11 [2024-11-27 19:50:34,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-27 19:50:34,261 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-27 19:50:34,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-27 19:50:34,488 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 19:50:34,490 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 19:50:35,426 INFO L? ?]: Removed 241 outVars from TransFormulas that were not future-live. [2024-11-27 19:50:35,426 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 19:50:35,443 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 19:50:35,444 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-27 19:50:35,444 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 07:50:35 BoogieIcfgContainer [2024-11-27 19:50:35,444 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 19:50:35,447 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 19:50:35,447 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 19:50:35,454 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 19:50:35,454 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 07:50:33" (1/3) ... [2024-11-27 19:50:35,455 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52fe53f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 07:50:35, skipping insertion in model container [2024-11-27 19:50:35,455 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:34" (2/3) ... [2024-11-27 19:50:35,457 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52fe53f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 07:50:35, skipping insertion in model container [2024-11-27 19:50:35,457 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 07:50:35" (3/3) ... [2024-11-27 19:50:35,459 INFO L128 eAbstractionObserver]: Analyzing ICFG recursified_egcd2.c [2024-11-27 19:50:35,499 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 19:50:35,501 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG recursified_egcd2.c that has 5 procedures, 175 locations, 1 initial locations, 0 loop locations, and 64 error locations. [2024-11-27 19:50:35,567 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 19:50:35,579 INFO L333 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, 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;@36188f59, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 19:50:35,579 INFO L334 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2024-11-27 19:50:35,583 INFO L276 IsEmpty]: Start isEmpty. Operand has 175 states, 94 states have (on average 1.7446808510638299) internal successors, (164), 160 states have internal predecessors, (164), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-27 19:50:35,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-27 19:50:35,589 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:50:35,590 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:50:35,591 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_40_to_48_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_40_to_48_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 62 more)] === [2024-11-27 19:50:35,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:50:35,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1683606298, now seen corresponding path program 1 times [2024-11-27 19:50:35,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:50:35,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666453909] [2024-11-27 19:50:35,602 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:50:35,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:50:35,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:50:35,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 19:50:35,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:50:35,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666453909] [2024-11-27 19:50:35,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666453909] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:50:35,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890883417] [2024-11-27 19:50:35,916 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:50:35,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:50:35,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf627ef1-4637-4679-a2be-2a7aabefe409/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:50:35,919 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf627ef1-4637-4679-a2be-2a7aabefe409/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:50:35,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf627ef1-4637-4679-a2be-2a7aabefe409/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 19:50:36,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:50:36,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-27 19:50:36,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:50:36,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 19:50:36,173 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:50:36,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890883417] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:50:36,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 19:50:36,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-27 19:50:36,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222247271] [2024-11-27 19:50:36,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:50:36,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-27 19:50:36,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:50:36,204 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-27 19:50:36,204 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-27 19:50:36,206 INFO L87 Difference]: Start difference. First operand has 175 states, 94 states have (on average 1.7446808510638299) internal successors, (164), 160 states have internal predecessors, (164), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 19:50:36,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:50:36,241 INFO L93 Difference]: Finished difference Result 346 states and 383 transitions. [2024-11-27 19:50:36,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-27 19:50:36,243 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2024-11-27 19:50:36,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:50:36,253 INFO L225 Difference]: With dead ends: 346 [2024-11-27 19:50:36,257 INFO L226 Difference]: Without dead ends: 168 [2024-11-27 19:50:36,262 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-27 19:50:36,265 INFO L435 NwaCegarLoop]: 183 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 19:50:36,266 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 19:50:36,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-11-27 19:50:36,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2024-11-27 19:50:36,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 89 states have (on average 1.7303370786516854) internal successors, (154), 154 states have internal predecessors, (154), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-27 19:50:36,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 176 transitions. [2024-11-27 19:50:36,336 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 176 transitions. Word has length 21 [2024-11-27 19:50:36,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:50:36,336 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 176 transitions. [2024-11-27 19:50:36,337 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 19:50:36,337 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 176 transitions. [2024-11-27 19:50:36,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-27 19:50:36,338 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:50:36,338 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:50:36,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf627ef1-4637-4679-a2be-2a7aabefe409/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-27 19:50:36,539 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf627ef1-4637-4679-a2be-2a7aabefe409/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-27 19:50:36,539 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting func_to_recursive_line_40_to_48_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_40_to_48_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_40_to_48_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 62 more)] === [2024-11-27 19:50:36,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:50:36,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1169407779, now seen corresponding path program 1 times [2024-11-27 19:50:36,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:50:36,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11224969] [2024-11-27 19:50:36,540 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:50:36,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:50:36,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 19:50:36,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [448520317] [2024-11-27 19:50:36,667 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:50:36,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:50:36,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf627ef1-4637-4679-a2be-2a7aabefe409/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:50:36,669 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf627ef1-4637-4679-a2be-2a7aabefe409/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:50:36,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf627ef1-4637-4679-a2be-2a7aabefe409/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 19:50:36,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:50:36,908 INFO L256 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-27 19:50:36,911 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:50:36,960 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 [2024-11-27 19:50:37,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 19:50:37,038 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:50:37,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:50:37,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11224969] [2024-11-27 19:50:37,039 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 19:50:37,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448520317] [2024-11-27 19:50:37,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448520317] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:50:37,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:50:37,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 19:50:37,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690112020] [2024-11-27 19:50:37,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:50:37,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 19:50:37,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:50:37,042 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 19:50:37,042 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:50:37,042 INFO L87 Difference]: Start difference. First operand 168 states and 176 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 19:50:37,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:50:37,314 INFO L93 Difference]: Finished difference Result 287 states and 301 transitions. [2024-11-27 19:50:37,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 19:50:37,316 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2024-11-27 19:50:37,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:50:37,322 INFO L225 Difference]: With dead ends: 287 [2024-11-27 19:50:37,323 INFO L226 Difference]: Without dead ends: 285 [2024-11-27 19:50:37,324 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-11-27 19:50:37,325 INFO L435 NwaCegarLoop]: 163 mSDtfsCounter, 208 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 19:50:37,325 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 793 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 19:50:37,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2024-11-27 19:50:37,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 221. [2024-11-27 19:50:37,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 137 states have (on average 1.7591240875912408) internal successors, (241), 202 states have internal predecessors, (241), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2024-11-27 19:50:37,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 272 transitions. [2024-11-27 19:50:37,365 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 272 transitions. Word has length 22 [2024-11-27 19:50:37,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:50:37,366 INFO L471 AbstractCegarLoop]: Abstraction has 221 states and 272 transitions. [2024-11-27 19:50:37,366 INFO L472 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 19:50:37,366 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 272 transitions. [2024-11-27 19:50:37,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-27 19:50:37,367 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:50:37,368 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:50:37,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf627ef1-4637-4679-a2be-2a7aabefe409/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-27 19:50:37,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf627ef1-4637-4679-a2be-2a7aabefe409/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-11-27 19:50:37,569 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_40_to_48_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_40_to_48_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 62 more)] === [2024-11-27 19:50:37,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:50:37,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1166822780, now seen corresponding path program 1 times [2024-11-27 19:50:37,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:50:37,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968482093] [2024-11-27 19:50:37,569 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:50:37,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:50:37,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:50:38,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:50:38,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:50:38,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968482093] [2024-11-27 19:50:38,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968482093] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:50:38,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:50:38,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-27 19:50:38,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848805266] [2024-11-27 19:50:38,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:50:38,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-27 19:50:38,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:50:38,493 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-27 19:50:38,493 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2024-11-27 19:50:38,494 INFO L87 Difference]: Start difference. First operand 221 states and 272 transitions. Second operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 19:50:40,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:50:40,071 INFO L93 Difference]: Finished difference Result 254 states and 305 transitions. [2024-11-27 19:50:40,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 19:50:40,072 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2024-11-27 19:50:40,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:50:40,073 INFO L225 Difference]: With dead ends: 254 [2024-11-27 19:50:40,074 INFO L226 Difference]: Without dead ends: 223 [2024-11-27 19:50:40,074 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2024-11-27 19:50:40,075 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 134 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 1147 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-27 19:50:40,076 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 403 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1147 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-27 19:50:40,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-11-27 19:50:40,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2024-11-27 19:50:40,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 138 states have (on average 1.7536231884057971) internal successors, (242), 203 states have internal predecessors, (242), 15 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2024-11-27 19:50:40,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 274 transitions. [2024-11-27 19:50:40,101 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 274 transitions. Word has length 22 [2024-11-27 19:50:40,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:50:40,102 INFO L471 AbstractCegarLoop]: Abstraction has 223 states and 274 transitions. [2024-11-27 19:50:40,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 19:50:40,102 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 274 transitions. [2024-11-27 19:50:40,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-27 19:50:40,103 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:50:40,103 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:50:40,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-27 19:50:40,103 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting func_to_recursive_line_40_to_48_0Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_40_to_48_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_40_to_48_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 62 more)] === [2024-11-27 19:50:40,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:50:40,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1480554747, now seen corresponding path program 1 times [2024-11-27 19:50:40,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:50:40,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571758237] [2024-11-27 19:50:40,104 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:50:40,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:50:40,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat