./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd2-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd2-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX --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 020f2d3a270ed8dfae4a7c8fa8db16a8ad645d088f685c7c500cf3124112cf45 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 18:50:18,590 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 18:50:18,704 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/config/svcomp-Overflow-32bit-Automizer_Default.epf [2024-11-08 18:50:18,710 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 18:50:18,711 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 18:50:18,739 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 18:50:18,740 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 18:50:18,740 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 18:50:18,741 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 18:50:18,742 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 18:50:18,742 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 18:50:18,743 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 18:50:18,743 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 18:50:18,744 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 18:50:18,744 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 18:50:18,745 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 18:50:18,745 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 18:50:18,746 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 18:50:18,746 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 18:50:18,747 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 18:50:18,747 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 18:50:18,748 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 18:50:18,748 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 18:50:18,749 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 18:50:18,752 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 18:50:18,753 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-11-08 18:50:18,753 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 18:50:18,754 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 18:50:18,754 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 18:50:18,754 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 18:50:18,755 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 18:50:18,755 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 18:50:18,755 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 18:50:18,756 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 18:50:18,758 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 18:50:18,758 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 18:50:18,759 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 18:50:18,759 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 18:50:18,759 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 18:50:18,760 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 18:50:18,760 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 18:50:18,762 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 18:50:18,762 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 18:50:18,762 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 18:50:18,762 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_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 020f2d3a270ed8dfae4a7c8fa8db16a8ad645d088f685c7c500cf3124112cf45 [2024-11-08 18:50:19,127 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 18:50:19,174 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 18:50:19,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 18:50:19,179 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 18:50:19,179 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 18:50:19,181 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd2-ll.c Unable to find full path for "g++" [2024-11-08 18:50:21,394 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 18:50:21,657 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 18:50:21,657 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd2-ll.c [2024-11-08 18:50:21,667 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/data/4956b97ee/d67655c4fbe94d849b47ee8f68a8c1e0/FLAG83424f4a7 [2024-11-08 18:50:21,689 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/data/4956b97ee/d67655c4fbe94d849b47ee8f68a8c1e0 [2024-11-08 18:50:21,691 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 18:50:21,693 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 18:50:21,694 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 18:50:21,694 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 18:50:21,700 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 18:50:21,701 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 06:50:21" (1/1) ... [2024-11-08 18:50:21,702 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48b400c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:50:21, skipping insertion in model container [2024-11-08 18:50:21,703 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 06:50:21" (1/1) ... [2024-11-08 18:50:21,730 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 18:50:21,980 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 18:50:22,001 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 18:50:22,052 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 18:50:22,073 INFO L204 MainTranslator]: Completed translation [2024-11-08 18:50:22,073 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:50:22 WrapperNode [2024-11-08 18:50:22,074 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 18:50:22,075 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 18:50:22,075 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 18:50:22,075 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 18:50:22,085 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:50:22" (1/1) ... [2024-11-08 18:50:22,097 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:50:22" (1/1) ... [2024-11-08 18:50:22,127 INFO L138 Inliner]: procedures = 17, calls = 142, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 159 [2024-11-08 18:50:22,127 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 18:50:22,128 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 18:50:22,129 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 18:50:22,129 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 18:50:22,144 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:50:22" (1/1) ... [2024-11-08 18:50:22,144 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:50:22" (1/1) ... [2024-11-08 18:50:22,151 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:50:22" (1/1) ... [2024-11-08 18:50:22,213 INFO L175 MemorySlicer]: Split 86 memory accesses to 13 slices as follows [2, 7, 10, 7, 12, 9, 3, 3, 8, 5, 8, 5, 7]. 14 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]. The 22 writes are split as follows [0, 3, 2, 2, 1, 1, 1, 1, 2, 2, 2, 2, 3]. [2024-11-08 18:50:22,213 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:50:22" (1/1) ... [2024-11-08 18:50:22,213 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:50:22" (1/1) ... [2024-11-08 18:50:22,236 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:50:22" (1/1) ... [2024-11-08 18:50:22,242 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:50:22" (1/1) ... [2024-11-08 18:50:22,244 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:50:22" (1/1) ... [2024-11-08 18:50:22,251 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:50:22" (1/1) ... [2024-11-08 18:50:22,259 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 18:50:22,266 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 18:50:22,266 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 18:50:22,266 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 18:50:22,268 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:50:22" (1/1) ... [2024-11-08 18:50:22,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 18:50:22,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:50:22,316 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 18:50:22,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 18:50:22,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 18:50:22,358 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-08 18:50:22,358 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-08 18:50:22,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 18:50:22,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 18:50:22,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-08 18:50:22,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-08 18:50:22,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-08 18:50:22,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-11-08 18:50:22,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-11-08 18:50:22,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-11-08 18:50:22,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2024-11-08 18:50:22,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2024-11-08 18:50:22,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2024-11-08 18:50:22,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2024-11-08 18:50:22,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#12 [2024-11-08 18:50:22,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-08 18:50:22,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 18:50:22,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 18:50:22,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-08 18:50:22,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-08 18:50:22,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-08 18:50:22,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-11-08 18:50:22,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-11-08 18:50:22,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-11-08 18:50:22,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2024-11-08 18:50:22,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#9 [2024-11-08 18:50:22,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#10 [2024-11-08 18:50:22,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#11 [2024-11-08 18:50:22,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#12 [2024-11-08 18:50:22,366 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_45_to_53_0 [2024-11-08 18:50:22,366 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_45_to_53_0 [2024-11-08 18:50:22,366 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_39_to_65_0 [2024-11-08 18:50:22,366 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_39_to_65_0 [2024-11-08 18:50:22,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 18:50:22,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 18:50:22,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 18:50:22,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 18:50:22,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-08 18:50:22,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-08 18:50:22,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-08 18:50:22,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-11-08 18:50:22,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-11-08 18:50:22,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-11-08 18:50:22,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2024-11-08 18:50:22,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#9 [2024-11-08 18:50:22,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#10 [2024-11-08 18:50:22,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#11 [2024-11-08 18:50:22,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#12 [2024-11-08 18:50:22,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-08 18:50:22,371 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-08 18:50:22,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-08 18:50:22,619 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 18:50:22,626 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 18:50:24,315 INFO L? ?]: Removed 217 outVars from TransFormulas that were not future-live. [2024-11-08 18:50:24,316 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 18:50:24,337 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 18:50:24,337 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-08 18:50:24,338 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 06:50:24 BoogieIcfgContainer [2024-11-08 18:50:24,338 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 18:50:24,340 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 18:50:24,341 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 18:50:24,345 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 18:50:24,345 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 06:50:21" (1/3) ... [2024-11-08 18:50:24,346 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14bea05e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 06:50:24, skipping insertion in model container [2024-11-08 18:50:24,346 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:50:22" (2/3) ... [2024-11-08 18:50:24,348 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14bea05e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 06:50:24, skipping insertion in model container [2024-11-08 18:50:24,349 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 06:50:24" (3/3) ... [2024-11-08 18:50:24,350 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_egcd2-ll.c [2024-11-08 18:50:24,367 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 18:50:24,367 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 64 error locations. [2024-11-08 18:50:24,449 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 18:50:24,456 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;@47e713d0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 18:50:24,457 INFO L334 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2024-11-08 18:50:24,462 INFO L276 IsEmpty]: Start isEmpty. Operand has 179 states, 96 states have (on average 1.7291666666666667) internal successors, (166), 162 states have internal predecessors, (166), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-08 18:50:24,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-08 18:50:24,473 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:50:24,474 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:50:24,476 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_39_to_65_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_39_to_65_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 62 more)] === [2024-11-08 18:50:24,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:50:24,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1406924726, now seen corresponding path program 1 times [2024-11-08 18:50:24,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:50:24,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929387399] [2024-11-08 18:50:24,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:50:24,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:50:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:50:24,904 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 18:50:24,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:50:24,920 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 18:50:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:50:24,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 18:50:24,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:50:24,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929387399] [2024-11-08 18:50:24,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929387399] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:50:24,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:50:24,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 18:50:24,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76889208] [2024-11-08 18:50:24,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:50:24,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-08 18:50:24,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:50:24,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-08 18:50:24,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-08 18:50:24,984 INFO L87 Difference]: Start difference. First operand has 179 states, 96 states have (on average 1.7291666666666667) internal successors, (166), 162 states have internal predecessors, (166), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 18:50:25,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:50:25,068 INFO L93 Difference]: Finished difference Result 354 states and 397 transitions. [2024-11-08 18:50:25,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-08 18:50:25,071 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2024-11-08 18:50:25,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:50:25,089 INFO L225 Difference]: With dead ends: 354 [2024-11-08 18:50:25,089 INFO L226 Difference]: Without dead ends: 172 [2024-11-08 18:50:25,100 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-08 18:50:25,106 INFO L432 NwaCegarLoop]: 189 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, 189 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 [2024-11-08 18:50:25,108 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 18:50:25,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-11-08 18:50:25,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2024-11-08 18:50:25,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 91 states have (on average 1.7142857142857142) internal successors, (156), 156 states have internal predecessors, (156), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-08 18:50:25,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 182 transitions. [2024-11-08 18:50:25,189 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 182 transitions. Word has length 15 [2024-11-08 18:50:25,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:50:25,190 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 182 transitions. [2024-11-08 18:50:25,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 18:50:25,192 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 182 transitions. [2024-11-08 18:50:25,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-08 18:50:25,194 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:50:25,194 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:50:25,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 18:50:25,195 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_39_to_65_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_39_to_65_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 62 more)] === [2024-11-08 18:50:25,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:50:25,196 INFO L85 PathProgramCache]: Analyzing trace with hash 2109836346, now seen corresponding path program 1 times [2024-11-08 18:50:25,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:50:25,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886191030] [2024-11-08 18:50:25,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:50:25,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:50:25,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 18:50:25,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1080399519] [2024-11-08 18:50:25,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:50:25,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:50:25,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:50:25,389 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:50:25,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 18:50:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:50:25,658 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-08 18:50:25,667 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:50:26,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-08 18:50:26,107 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 18:50:26,108 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 22 treesize of output 22 [2024-11-08 18:50:26,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:50:26,162 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 18:50:26,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:50:26,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886191030] [2024-11-08 18:50:26,164 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 18:50:26,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080399519] [2024-11-08 18:50:26,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080399519] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:50:26,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:50:26,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-08 18:50:26,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503846227] [2024-11-08 18:50:26,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:50:26,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 18:50:26,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:50:26,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 18:50:26,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-08 18:50:26,175 INFO L87 Difference]: Start difference. First operand 172 states and 182 transitions. Second operand has 12 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 18:50:30,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 18:50:30,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:50:30,898 INFO L93 Difference]: Finished difference Result 176 states and 185 transitions. [2024-11-08 18:50:30,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 18:50:30,900 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2024-11-08 18:50:30,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:50:30,902 INFO L225 Difference]: With dead ends: 176 [2024-11-08 18:50:30,902 INFO L226 Difference]: Without dead ends: 175 [2024-11-08 18:50:30,905 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-11-08 18:50:30,907 INFO L432 NwaCegarLoop]: 166 mSDtfsCounter, 187 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-11-08 18:50:30,908 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 1082 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 199 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2024-11-08 18:50:30,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-11-08 18:50:30,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2024-11-08 18:50:30,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 94 states have (on average 1.6808510638297873) internal successors, (158), 158 states have internal predecessors, (158), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-08 18:50:30,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 184 transitions. [2024-11-08 18:50:30,943 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 184 transitions. Word has length 15 [2024-11-08 18:50:30,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:50:30,945 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 184 transitions. [2024-11-08 18:50:30,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 18:50:30,945 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 184 transitions. [2024-11-08 18:50:30,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-08 18:50:30,946 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:50:30,946 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:50:30,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 18:50:31,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:50:31,153 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_39_to_65_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_39_to_65_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 62 more)] === [2024-11-08 18:50:31,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:50:31,153 INFO L85 PathProgramCache]: Analyzing trace with hash 980417466, now seen corresponding path program 1 times [2024-11-08 18:50:31,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:50:31,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606767058] [2024-11-08 18:50:31,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:50:31,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:50:31,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 18:50:31,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [122487654] [2024-11-08 18:50:31,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:50:31,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:50:31,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:50:31,325 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:50:31,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 18:50:31,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:50:31,540 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-08 18:50:31,543 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:50:31,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 18:50:31,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 18:50:32,029 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 18:50:32,029 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 22 treesize of output 22 [2024-11-08 18:50:32,054 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 18:50:32,054 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 29 treesize of output 25 [2024-11-08 18:50:32,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:50:32,116 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 18:50:32,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:50:32,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606767058] [2024-11-08 18:50:32,117 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 18:50:32,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122487654] [2024-11-08 18:50:32,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122487654] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:50:32,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:50:32,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-08 18:50:32,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436786830] [2024-11-08 18:50:32,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:50:32,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-08 18:50:32,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:50:32,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-08 18:50:32,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-08 18:50:32,124 INFO L87 Difference]: Start difference. First operand 175 states and 184 transitions. Second operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 18:50:32,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:50:32,911 INFO L93 Difference]: Finished difference Result 175 states and 184 transitions. [2024-11-08 18:50:32,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 18:50:32,912 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2024-11-08 18:50:32,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:50:32,914 INFO L225 Difference]: With dead ends: 175 [2024-11-08 18:50:32,914 INFO L226 Difference]: Without dead ends: 174 [2024-11-08 18:50:32,915 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-08 18:50:32,916 INFO L432 NwaCegarLoop]: 158 mSDtfsCounter, 208 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-08 18:50:32,917 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 840 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-08 18:50:32,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-11-08 18:50:32,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2024-11-08 18:50:32,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 94 states have (on average 1.6702127659574468) internal successors, (157), 157 states have internal predecessors, (157), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-08 18:50:32,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 183 transitions. [2024-11-08 18:50:32,938 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 183 transitions. Word has length 16 [2024-11-08 18:50:32,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:50:32,939 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 183 transitions. [2024-11-08 18:50:32,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 18:50:32,939 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 183 transitions. [2024-11-08 18:50:32,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-08 18:50:32,940 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:50:32,940 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:50:32,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 18:50:33,144 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:50:33,145 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_39_to_65_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_39_to_65_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 62 more)] === [2024-11-08 18:50:33,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:50:33,146 INFO L85 PathProgramCache]: Analyzing trace with hash 328170556, now seen corresponding path program 1 times [2024-11-08 18:50:33,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:50:33,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557943629] [2024-11-08 18:50:33,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:50:33,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:50:33,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 18:50:33,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1329762468] [2024-11-08 18:50:33,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:50:33,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:50:33,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:50:33,221 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:50:33,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 18:50:33,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:50:33,453 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-08 18:50:33,455 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:50:33,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-11-08 18:50:33,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:50:33,548 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 18:50:33,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:50:33,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557943629] [2024-11-08 18:50:33,549 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 18:50:33,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329762468] [2024-11-08 18:50:33,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329762468] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:50:33,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:50:33,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-08 18:50:33,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484667005] [2024-11-08 18:50:33,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:50:33,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 18:50:33,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:50:33,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 18:50:33,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-08 18:50:33,554 INFO L87 Difference]: Start difference. First operand 174 states and 183 transitions. Second operand has 7 states, 5 states have (on average 2.6) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 18:50:33,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:50:33,787 INFO L93 Difference]: Finished difference Result 174 states and 183 transitions. [2024-11-08 18:50:33,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 18:50:33,792 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2024-11-08 18:50:33,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:50:33,793 INFO L225 Difference]: With dead ends: 174 [2024-11-08 18:50:33,794 INFO L226 Difference]: Without dead ends: 173 [2024-11-08 18:50:33,794 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-08 18:50:33,795 INFO L432 NwaCegarLoop]: 167 mSDtfsCounter, 24 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 18:50:33,796 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 945 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 18:50:33,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-11-08 18:50:33,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2024-11-08 18:50:33,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 94 states have (on average 1.6595744680851063) internal successors, (156), 156 states have internal predecessors, (156), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-08 18:50:33,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 182 transitions. [2024-11-08 18:50:33,814 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 182 transitions. Word has length 17 [2024-11-08 18:50:33,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:50:33,815 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 182 transitions. [2024-11-08 18:50:33,815 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 18:50:33,815 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 182 transitions. [2024-11-08 18:50:33,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-08 18:50:33,816 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:50:33,816 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:50:33,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 18:50:34,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:50:34,018 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_39_to_65_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_39_to_65_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 62 more)] === [2024-11-08 18:50:34,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:50:34,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1583352828, now seen corresponding path program 1 times [2024-11-08 18:50:34,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:50:34,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393126423] [2024-11-08 18:50:34,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:50:34,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:50:34,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 18:50:34,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175807571] [2024-11-08 18:50:34,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:50:34,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:50:34,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:50:34,108 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:50:34,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 18:50:34,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:50:34,327 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-08 18:50:34,330 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:50:34,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 18:50:34,598 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 18:50:34,598 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 36 treesize of output 28 [2024-11-08 18:50:34,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:50:34,645 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 18:50:34,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:50:34,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393126423] [2024-11-08 18:50:34,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 18:50:34,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175807571] [2024-11-08 18:50:34,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175807571] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:50:34,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:50:34,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-08 18:50:34,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647859672] [2024-11-08 18:50:34,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:50:34,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-08 18:50:34,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:50:34,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-08 18:50:34,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-08 18:50:34,653 INFO L87 Difference]: Start difference. First operand 173 states and 182 transitions. Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 18:50:35,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:50:35,243 INFO L93 Difference]: Finished difference Result 173 states and 182 transitions. [2024-11-08 18:50:35,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 18:50:35,244 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2024-11-08 18:50:35,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:50:35,246 INFO L225 Difference]: With dead ends: 173 [2024-11-08 18:50:35,246 INFO L226 Difference]: Without dead ends: 172 [2024-11-08 18:50:35,247 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-08 18:50:35,248 INFO L432 NwaCegarLoop]: 160 mSDtfsCounter, 158 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-08 18:50:35,248 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 972 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-08 18:50:35,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-11-08 18:50:35,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2024-11-08 18:50:35,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 94 states have (on average 1.648936170212766) internal successors, (155), 155 states have internal predecessors, (155), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-08 18:50:35,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 181 transitions. [2024-11-08 18:50:35,281 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 181 transitions. Word has length 18 [2024-11-08 18:50:35,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:50:35,282 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 181 transitions. [2024-11-08 18:50:35,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 18:50:35,282 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 181 transitions. [2024-11-08 18:50:35,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-08 18:50:35,285 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:50:35,285 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:50:35,312 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 18:50:35,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:50:35,491 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting func_to_recursive_line_45_to_53_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_39_to_65_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_39_to_65_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 62 more)] === [2024-11-08 18:50:35,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:50:35,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1143096871, now seen corresponding path program 1 times [2024-11-08 18:50:35,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:50:35,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714332681] [2024-11-08 18:50:35,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:50:35,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:50:35,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 18:50:35,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [391396691] [2024-11-08 18:50:35,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:50:35,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:50:35,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:50:35,624 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:50:35,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 18:50:35,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:50:35,960 INFO L255 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-08 18:50:35,965 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:50:36,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 18:50:36,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 18:50:36,223 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 [2024-11-08 18:50:36,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-08 18:50:36,349 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 18:50:36,349 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:50:37,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:50:37,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714332681] [2024-11-08 18:50:37,027 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 18:50:37,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391396691] [2024-11-08 18:50:37,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391396691] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:50:37,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 18:50:37,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2024-11-08 18:50:37,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193913342] [2024-11-08 18:50:37,028 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 18:50:37,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 18:50:37,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:50:37,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 18:50:37,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2024-11-08 18:50:37,031 INFO L87 Difference]: Start difference. First operand 172 states and 181 transitions. Second operand has 14 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-08 18:50:41,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 18:50:46,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 18:50:50,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 18:50:50,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:50:50,242 INFO L93 Difference]: Finished difference Result 402 states and 421 transitions. [2024-11-08 18:50:50,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-08 18:50:50,245 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2024-11-08 18:50:50,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:50:50,248 INFO L225 Difference]: With dead ends: 402 [2024-11-08 18:50:50,248 INFO L226 Difference]: Without dead ends: 401 [2024-11-08 18:50:50,249 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2024-11-08 18:50:50,250 INFO L432 NwaCegarLoop]: 145 mSDtfsCounter, 356 mSDsluCounter, 1727 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 25 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 1872 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2024-11-08 18:50:50,250 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 1872 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 516 Invalid, 3 Unknown, 0 Unchecked, 12.8s Time] [2024-11-08 18:50:50,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2024-11-08 18:50:50,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 297. [2024-11-08 18:50:50,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 203 states have (on average 1.7142857142857142) internal successors, (348), 266 states have internal predecessors, (348), 24 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (26), 23 states have call predecessors, (26), 24 states have call successors, (26) [2024-11-08 18:50:50,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 398 transitions. [2024-11-08 18:50:50,322 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 398 transitions. Word has length 38 [2024-11-08 18:50:50,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:50:50,323 INFO L471 AbstractCegarLoop]: Abstraction has 297 states and 398 transitions. [2024-11-08 18:50:50,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-08 18:50:50,323 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 398 transitions. [2024-11-08 18:50:50,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-08 18:50:50,325 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:50:50,325 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:50:50,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-08 18:50:50,525 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:50:50,525 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_39_to_65_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_39_to_65_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 62 more)] === [2024-11-08 18:50:50,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:50:50,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1149019582, now seen corresponding path program 1 times [2024-11-08 18:50:50,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:50:50,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271744449] [2024-11-08 18:50:50,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:50:50,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:50:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:50:51,222 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 18:50:51,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:50:51,227 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 18:50:51,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:50:51,288 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-08 18:50:51,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:50:51,296 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-08 18:50:51,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:50:51,340 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-11-08 18:50:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:50:51,490 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 18:50:51,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:50:51,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271744449] [2024-11-08 18:50:51,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271744449] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:50:51,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383417916] [2024-11-08 18:50:51,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:50:51,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:50:51,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:50:51,495 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:50:51,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 18:50:51,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:50:51,734 INFO L255 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-08 18:50:51,737 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:50:51,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 18:50:51,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 18:50:52,191 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 18:50:52,193 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:50:52,683 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 18:50:52,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383417916] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:50:52,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:50:52,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 25 [2024-11-08 18:50:52,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938196357] [2024-11-08 18:50:52,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:50:52,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-08 18:50:52,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:50:52,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-08 18:50:52,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2024-11-08 18:50:52,686 INFO L87 Difference]: Start difference. First operand 297 states and 398 transitions. Second operand has 25 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 20 states have internal predecessors, (45), 6 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2024-11-08 18:51:00,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 18:51:04,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 18:51:09,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 18:51:13,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 18:51:17,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 18:51:17,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:51:17,386 INFO L93 Difference]: Finished difference Result 367 states and 421 transitions. [2024-11-08 18:51:17,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-08 18:51:17,387 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 20 states have internal predecessors, (45), 6 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 38 [2024-11-08 18:51:17,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:51:17,391 INFO L225 Difference]: With dead ends: 367 [2024-11-08 18:51:17,392 INFO L226 Difference]: Without dead ends: 334 [2024-11-08 18:51:17,393 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=235, Invalid=1405, Unknown=0, NotChecked=0, Total=1640 [2024-11-08 18:51:17,394 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 702 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 1884 mSolverCounterSat, 113 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 2007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1884 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.9s IncrementalHoareTripleChecker+Time [2024-11-08 18:51:17,395 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [711 Valid, 698 Invalid, 2007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1884 Invalid, 10 Unknown, 0 Unchecked, 23.9s Time] [2024-11-08 18:51:17,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2024-11-08 18:51:17,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 291. [2024-11-08 18:51:17,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 197 states have (on average 1.700507614213198) internal successors, (335), 259 states have internal predecessors, (335), 23 states have call successors, (23), 10 states have call predecessors, (23), 11 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) [2024-11-08 18:51:17,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 384 transitions. [2024-11-08 18:51:17,433 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 384 transitions. Word has length 38 [2024-11-08 18:51:17,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:51:17,434 INFO L471 AbstractCegarLoop]: Abstraction has 291 states and 384 transitions. [2024-11-08 18:51:17,434 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 20 states have internal predecessors, (45), 6 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2024-11-08 18:51:17,434 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 384 transitions. [2024-11-08 18:51:17,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-08 18:51:17,435 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:51:17,436 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:51:17,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 18:51:17,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:51:17,640 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting func_to_recursive_line_45_to_53_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_39_to_65_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_39_to_65_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 62 more)] === [2024-11-08 18:51:17,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:51:17,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1076264557, now seen corresponding path program 1 times [2024-11-08 18:51:17,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:51:17,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525110810] [2024-11-08 18:51:17,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:51:17,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:51:17,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 18:51:17,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [576835677] [2024-11-08 18:51:17,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:51:17,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:51:17,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:51:17,749 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:51:17,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 18:51:18,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:51:18,038 INFO L255 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-08 18:51:18,042 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:51:18,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 18:51:18,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 18:51:18,277 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 [2024-11-08 18:51:18,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-08 18:51:18,394 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 18:51:18,394 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:51:19,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:51:19,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525110810] [2024-11-08 18:51:19,312 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 18:51:19,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576835677] [2024-11-08 18:51:19,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576835677] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:51:19,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 18:51:19,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2024-11-08 18:51:19,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768901128] [2024-11-08 18:51:19,313 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 18:51:19,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 18:51:19,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:51:19,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 18:51:19,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2024-11-08 18:51:19,315 INFO L87 Difference]: Start difference. First operand 291 states and 384 transitions. Second operand has 14 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-08 18:51:24,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 18:51:28,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 18:51:32,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 18:51:32,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:51:32,263 INFO L93 Difference]: Finished difference Result 376 states and 394 transitions. [2024-11-08 18:51:32,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-08 18:51:32,266 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 39 [2024-11-08 18:51:32,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:51:32,269 INFO L225 Difference]: With dead ends: 376 [2024-11-08 18:51:32,269 INFO L226 Difference]: Without dead ends: 375 [2024-11-08 18:51:32,270 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2024-11-08 18:51:32,271 INFO L432 NwaCegarLoop]: 148 mSDtfsCounter, 304 mSDsluCounter, 1677 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 21 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 1825 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2024-11-08 18:51:32,271 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 1825 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 452 Invalid, 3 Unknown, 0 Unchecked, 12.6s Time] [2024-11-08 18:51:32,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2024-11-08 18:51:32,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 291. [2024-11-08 18:51:32,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 197 states have (on average 1.6954314720812182) internal successors, (334), 259 states have internal predecessors, (334), 23 states have call successors, (23), 10 states have call predecessors, (23), 11 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) [2024-11-08 18:51:32,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 383 transitions. [2024-11-08 18:51:32,304 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 383 transitions. Word has length 39 [2024-11-08 18:51:32,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:51:32,304 INFO L471 AbstractCegarLoop]: Abstraction has 291 states and 383 transitions. [2024-11-08 18:51:32,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-08 18:51:32,305 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 383 transitions. [2024-11-08 18:51:32,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-08 18:51:32,306 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:51:32,306 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:51:32,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-08 18:51:32,507 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f917192-046b-4d5a-be5a-06f002902bca/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:51:32,507 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting func_to_recursive_line_45_to_53_0Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_39_to_65_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_39_to_65_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 62 more)] === [2024-11-08 18:51:32,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:51:32,508 INFO L85 PathProgramCache]: Analyzing trace with hash 995537179, now seen corresponding path program 1 times [2024-11-08 18:51:32,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:51:32,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70591664] [2024-11-08 18:51:32,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:51:32,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:51:32,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat