./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd3-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd3-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme --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 31cf2fabf53e081c3004f39943d7e98ce7bd9dc5e02db94d5bcffe73b0927449 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:59:09,998 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:59:10,111 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-26 11:59:10,118 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:59:10,119 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:59:10,156 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:59:10,157 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:59:10,158 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:59:10,159 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:59:10,164 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:59:10,164 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:59:10,165 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:59:10,166 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:59:10,168 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:59:10,169 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:59:10,169 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:59:10,170 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:59:10,170 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:59:10,171 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:59:10,171 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:59:10,171 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:59:10,174 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:59:10,175 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:59:10,175 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:59:10,175 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-26 11:59:10,176 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:59:10,176 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:59:10,177 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:59:10,177 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:59:10,178 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:59:10,179 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:59:10,180 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:59:10,180 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:59:10,180 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:59:10,181 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:59:10,181 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:59:10,181 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:59:10,182 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:59:10,182 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:59:10,182 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:59:10,182 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:59:10,183 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:59:10,183 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:59:10,183 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:59:10,184 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_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31cf2fabf53e081c3004f39943d7e98ce7bd9dc5e02db94d5bcffe73b0927449 [2023-11-26 11:59:10,498 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:59:10,530 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:59:10,533 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:59:10,535 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:59:10,535 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:59:10,537 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd3-ll.c [2023-11-26 11:59:13,662 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:59:13,921 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:59:13,926 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd3-ll.c [2023-11-26 11:59:13,937 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/data/09ca697de/a40e70ca8f654c698053fef1127445f3/FLAGa5d8ee366 [2023-11-26 11:59:13,960 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/data/09ca697de/a40e70ca8f654c698053fef1127445f3 [2023-11-26 11:59:13,965 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:59:13,967 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:59:13,971 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:59:13,971 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:59:13,977 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:59:13,978 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:59:13" (1/1) ... [2023-11-26 11:59:13,979 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@258fbc64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:13, skipping insertion in model container [2023-11-26 11:59:13,979 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:59:13" (1/1) ... [2023-11-26 11:59:14,019 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:59:14,253 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:59:14,269 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:59:14,334 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:59:14,351 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:59:14,352 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:14 WrapperNode [2023-11-26 11:59:14,352 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:59:14,353 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:59:14,354 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:59:14,354 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:59:14,362 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:14" (1/1) ... [2023-11-26 11:59:14,374 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:14" (1/1) ... [2023-11-26 11:59:14,398 INFO L138 Inliner]: procedures = 18, calls = 128, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 115 [2023-11-26 11:59:14,399 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:59:14,400 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:59:14,400 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:59:14,400 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:59:14,412 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:14" (1/1) ... [2023-11-26 11:59:14,412 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:14" (1/1) ... [2023-11-26 11:59:14,418 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:14" (1/1) ... [2023-11-26 11:59:14,446 INFO L175 MemorySlicer]: Split 77 memory accesses to 13 slices as follows [2, 7, 6, 5, 6, 6, 5, 6, 7, 7, 9, 6, 5]. 12 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 2, 2, 2]. [2023-11-26 11:59:14,446 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:14" (1/1) ... [2023-11-26 11:59:14,447 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:14" (1/1) ... [2023-11-26 11:59:14,462 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:14" (1/1) ... [2023-11-26 11:59:14,464 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:14" (1/1) ... [2023-11-26 11:59:14,467 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:14" (1/1) ... [2023-11-26 11:59:14,470 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:14" (1/1) ... [2023-11-26 11:59:14,476 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:59:14,477 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:59:14,477 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:59:14,477 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:59:14,481 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:14" (1/1) ... [2023-11-26 11:59:14,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:59:14,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:14,536 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:59:14,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:59:14,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:59:14,586 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:59:14,587 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:59:14,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:59:14,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:59:14,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:59:14,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 11:59:14,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 11:59:14,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-26 11:59:14,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-26 11:59:14,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2023-11-26 11:59:14,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2023-11-26 11:59:14,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2023-11-26 11:59:14,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2023-11-26 11:59:14,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2023-11-26 11:59:14,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#12 [2023-11-26 11:59:14,592 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_47_to_56_0 [2023-11-26 11:59:14,592 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_47_to_56_0 [2023-11-26 11:59:14,593 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_70_0 [2023-11-26 11:59:14,594 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_70_0 [2023-11-26 11:59:14,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:59:14,595 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_40_to_59_0 [2023-11-26 11:59:14,595 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_40_to_59_0 [2023-11-26 11:59:14,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:59:14,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:59:14,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:59:14,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 11:59:14,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 11:59:14,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-26 11:59:14,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-11-26 11:59:14,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2023-11-26 11:59:14,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2023-11-26 11:59:14,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#9 [2023-11-26 11:59:14,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#10 [2023-11-26 11:59:14,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#11 [2023-11-26 11:59:14,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#12 [2023-11-26 11:59:14,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:59:14,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:59:14,602 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:59:14,602 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:59:14,602 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:59:14,602 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 11:59:14,602 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 11:59:14,603 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-26 11:59:14,603 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-11-26 11:59:14,603 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2023-11-26 11:59:14,603 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2023-11-26 11:59:14,603 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#9 [2023-11-26 11:59:14,604 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#10 [2023-11-26 11:59:14,604 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#11 [2023-11-26 11:59:14,604 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#12 [2023-11-26 11:59:14,604 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-26 11:59:14,604 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-26 11:59:14,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:59:14,837 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:59:14,840 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:59:15,491 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:59:15,528 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:59:15,528 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-26 11:59:15,529 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:59:15 BoogieIcfgContainer [2023-11-26 11:59:15,529 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:59:15,532 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:59:15,532 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:59:15,543 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:59:15,543 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:59:13" (1/3) ... [2023-11-26 11:59:15,544 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f7931 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:59:15, skipping insertion in model container [2023-11-26 11:59:15,544 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:14" (2/3) ... [2023-11-26 11:59:15,546 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f7931 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:59:15, skipping insertion in model container [2023-11-26 11:59:15,547 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:59:15" (3/3) ... [2023-11-26 11:59:15,550 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_egcd3-ll.c [2023-11-26 11:59:15,569 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:59:15,570 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 50 error locations. [2023-11-26 11:59:15,627 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:59:15,635 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@46e277fa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:59:15,635 INFO L358 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2023-11-26 11:59:15,640 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 79 states have (on average 1.7341772151898733) internal successors, (137), 132 states have internal predecessors, (137), 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) [2023-11-26 11:59:15,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-26 11:59:15,649 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:15,650 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:15,651 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_47_to_56_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_47_to_56_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 48 more)] === [2023-11-26 11:59:15,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:15,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1541213432, now seen corresponding path program 1 times [2023-11-26 11:59:15,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:15,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139003323] [2023-11-26 11:59:15,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:15,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:15,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:15,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:15,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139003323] [2023-11-26 11:59:15,957 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 11:59:15,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127092840] [2023-11-26 11:59:15,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:15,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:15,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:15,961 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:15,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:59:16,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:16,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 11:59:16,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:16,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:59:16,177 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:16,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127092840] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:16,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:16,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:59:16,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869725511] [2023-11-26 11:59:16,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:16,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:59:16,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:16,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:59:16,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:59:16,217 INFO L87 Difference]: Start difference. First operand has 148 states, 79 states have (on average 1.7341772151898733) internal successors, (137), 132 states have internal predecessors, (137), 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) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:59:16,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:16,276 INFO L93 Difference]: Finished difference Result 294 states and 336 transitions. [2023-11-26 11:59:16,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:59:16,279 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2023-11-26 11:59:16,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:16,288 INFO L225 Difference]: With dead ends: 294 [2023-11-26 11:59:16,288 INFO L226 Difference]: Without dead ends: 145 [2023-11-26 11:59:16,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:59:16,297 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:16,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 156 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:59:16,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-11-26 11:59:16,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2023-11-26 11:59:16,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 78 states have (on average 1.6666666666666667) internal successors, (130), 130 states have internal predecessors, (130), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-26 11:59:16,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 154 transitions. [2023-11-26 11:59:16,349 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 154 transitions. Word has length 20 [2023-11-26 11:59:16,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:16,350 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 154 transitions. [2023-11-26 11:59:16,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:59:16,350 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 154 transitions. [2023-11-26 11:59:16,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-26 11:59:16,352 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:16,352 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:16,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:16,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 11:59:16,559 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_47_to_56_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_47_to_56_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 48 more)] === [2023-11-26 11:59:16,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:16,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1944077212, now seen corresponding path program 1 times [2023-11-26 11:59:16,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:16,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392083239] [2023-11-26 11:59:16,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:16,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:16,613 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:59:16,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772284065] [2023-11-26 11:59:16,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:16,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:16,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:16,616 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:16,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:59:16,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:16,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-26 11:59:16,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:16,986 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 23 treesize of output 15 [2023-11-26 11:59:17,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 11:59:17,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:59:17,160 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:17,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:17,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392083239] [2023-11-26 11:59:17,167 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:59:17,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772284065] [2023-11-26 11:59:17,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772284065] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:17,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:17,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-26 11:59:17,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853939968] [2023-11-26 11:59:17,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:17,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 11:59:17,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:17,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 11:59:17,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:59:17,171 INFO L87 Difference]: Start difference. First operand 145 states and 154 transitions. Second operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:59:17,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:17,984 INFO L93 Difference]: Finished difference Result 176 states and 185 transitions. [2023-11-26 11:59:17,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 11:59:17,985 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 21 [2023-11-26 11:59:17,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:17,989 INFO L225 Difference]: With dead ends: 176 [2023-11-26 11:59:17,992 INFO L226 Difference]: Without dead ends: 147 [2023-11-26 11:59:17,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-11-26 11:59:17,996 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 120 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:17,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 336 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 11:59:18,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-11-26 11:59:18,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2023-11-26 11:59:18,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 79 states have (on average 1.6582278481012658) internal successors, (131), 131 states have internal predecessors, (131), 12 states have call successors, (12), 5 states have call predecessors, (12), 6 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2023-11-26 11:59:18,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 156 transitions. [2023-11-26 11:59:18,037 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 156 transitions. Word has length 21 [2023-11-26 11:59:18,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:18,038 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 156 transitions. [2023-11-26 11:59:18,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:59:18,038 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 156 transitions. [2023-11-26 11:59:18,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-26 11:59:18,040 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:18,041 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:18,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:18,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:18,256 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting func_to_recursive_line_47_to_56_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_47_to_56_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_47_to_56_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 48 more)] === [2023-11-26 11:59:18,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:18,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1901822174, now seen corresponding path program 1 times [2023-11-26 11:59:18,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:18,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293009401] [2023-11-26 11:59:18,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:18,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:18,380 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:59:18,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1921312850] [2023-11-26 11:59:18,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:18,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:18,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:18,385 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:18,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:59:18,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:18,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 88 conjunts are in the unsatisfiable core [2023-11-26 11:59:18,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:18,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 11:59:18,811 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 11 [2023-11-26 11:59:18,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 11:59:19,026 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 [2023-11-26 11:59:19,328 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 [2023-11-26 11:59:19,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:59:19,353 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:19,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:19,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293009401] [2023-11-26 11:59:19,354 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:59:19,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921312850] [2023-11-26 11:59:19,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921312850] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:19,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:19,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-11-26 11:59:19,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559813607] [2023-11-26 11:59:19,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:19,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-26 11:59:19,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:19,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-26 11:59:19,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2023-11-26 11:59:19,359 INFO L87 Difference]: Start difference. First operand 147 states and 156 transitions. Second operand has 17 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:59:20,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:20,302 INFO L93 Difference]: Finished difference Result 240 states and 257 transitions. [2023-11-26 11:59:20,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-26 11:59:20,303 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-11-26 11:59:20,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:20,306 INFO L225 Difference]: With dead ends: 240 [2023-11-26 11:59:20,306 INFO L226 Difference]: Without dead ends: 237 [2023-11-26 11:59:20,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2023-11-26 11:59:20,309 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 218 mSDsluCounter, 1384 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 1510 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:20,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 1510 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 11:59:20,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2023-11-26 11:59:20,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 201. [2023-11-26 11:59:20,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 123 states have (on average 1.6585365853658536) internal successors, (204), 177 states have internal predecessors, (204), 20 states have call successors, (20), 8 states have call predecessors, (20), 8 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2023-11-26 11:59:20,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 245 transitions. [2023-11-26 11:59:20,350 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 245 transitions. Word has length 25 [2023-11-26 11:59:20,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:20,350 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 245 transitions. [2023-11-26 11:59:20,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:59:20,351 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 245 transitions. [2023-11-26 11:59:20,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-26 11:59:20,352 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:20,352 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:20,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:20,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:20,560 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting func_to_recursive_line_33_to_70_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_47_to_56_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_47_to_56_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 48 more)] === [2023-11-26 11:59:20,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:20,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1899033830, now seen corresponding path program 1 times [2023-11-26 11:59:20,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:20,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127943477] [2023-11-26 11:59:20,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:20,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:20,662 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:59:20,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [865142400] [2023-11-26 11:59:20,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:20,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:20,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:20,669 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:20,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:59:20,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:20,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:59:20,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:20,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 11:59:20,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:59:20,923 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:20,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:20,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127943477] [2023-11-26 11:59:20,927 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:59:20,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865142400] [2023-11-26 11:59:20,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865142400] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:20,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:20,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:59:20,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039775718] [2023-11-26 11:59:20,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:20,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:59:20,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:20,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:59:20,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:59:20,931 INFO L87 Difference]: Start difference. First operand 201 states and 245 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:59:21,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:21,266 INFO L93 Difference]: Finished difference Result 222 states and 268 transitions. [2023-11-26 11:59:21,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:59:21,267 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2023-11-26 11:59:21,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:21,269 INFO L225 Difference]: With dead ends: 222 [2023-11-26 11:59:21,270 INFO L226 Difference]: Without dead ends: 220 [2023-11-26 11:59:21,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:59:21,271 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 100 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:21,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 238 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:59:21,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2023-11-26 11:59:21,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 208. [2023-11-26 11:59:21,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 128 states have (on average 1.6328125) internal successors, (209), 181 states have internal predecessors, (209), 20 states have call successors, (20), 8 states have call predecessors, (20), 10 states have return successors, (25), 20 states have call predecessors, (25), 20 states have call successors, (25) [2023-11-26 11:59:21,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 254 transitions. [2023-11-26 11:59:21,309 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 254 transitions. Word has length 25 [2023-11-26 11:59:21,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:21,310 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 254 transitions. [2023-11-26 11:59:21,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:59:21,310 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 254 transitions. [2023-11-26 11:59:21,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-26 11:59:21,312 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:21,312 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:21,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:21,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:21,521 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting func_to_recursive_line_47_to_56_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_47_to_56_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_47_to_56_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 48 more)] === [2023-11-26 11:59:21,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:21,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1173054713, now seen corresponding path program 1 times [2023-11-26 11:59:21,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:21,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614370564] [2023-11-26 11:59:21,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:21,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:21,585 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:59:21,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1574689809] [2023-11-26 11:59:21,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:21,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:21,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:21,599 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:21,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:59:21,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:21,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 88 conjunts are in the unsatisfiable core [2023-11-26 11:59:21,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:21,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 11:59:21,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 11:59:21,962 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 11 [2023-11-26 11:59:22,117 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 [2023-11-26 11:59:22,399 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 [2023-11-26 11:59:22,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:59:22,427 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:22,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:22,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614370564] [2023-11-26 11:59:22,428 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:59:22,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574689809] [2023-11-26 11:59:22,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574689809] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:22,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:22,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-11-26 11:59:22,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363346967] [2023-11-26 11:59:22,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:22,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-26 11:59:22,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:22,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-26 11:59:22,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2023-11-26 11:59:22,430 INFO L87 Difference]: Start difference. First operand 208 states and 254 transitions. Second operand has 17 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:59:23,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:23,213 INFO L93 Difference]: Finished difference Result 247 states and 266 transitions. [2023-11-26 11:59:23,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-26 11:59:23,214 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2023-11-26 11:59:23,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:23,216 INFO L225 Difference]: With dead ends: 247 [2023-11-26 11:59:23,216 INFO L226 Difference]: Without dead ends: 246 [2023-11-26 11:59:23,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2023-11-26 11:59:23,218 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 214 mSDsluCounter, 1226 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 1353 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:23,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 1353 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 11:59:23,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-11-26 11:59:23,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 208. [2023-11-26 11:59:23,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 128 states have (on average 1.625) internal successors, (208), 181 states have internal predecessors, (208), 20 states have call successors, (20), 8 states have call predecessors, (20), 10 states have return successors, (25), 20 states have call predecessors, (25), 20 states have call successors, (25) [2023-11-26 11:59:23,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 253 transitions. [2023-11-26 11:59:23,235 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 253 transitions. Word has length 26 [2023-11-26 11:59:23,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:23,236 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 253 transitions. [2023-11-26 11:59:23,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:59:23,237 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 253 transitions. [2023-11-26 11:59:23,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-26 11:59:23,238 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:23,238 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:23,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:23,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:23,451 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting func_to_recursive_line_47_to_56_0Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_47_to_56_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_47_to_56_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 48 more)] === [2023-11-26 11:59:23,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:23,451 INFO L85 PathProgramCache]: Analyzing trace with hash -2004957696, now seen corresponding path program 1 times [2023-11-26 11:59:23,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:23,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133900801] [2023-11-26 11:59:23,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:23,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:23,511 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:59:23,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1950816670] [2023-11-26 11:59:23,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:23,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:23,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:23,513 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:23,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:59:23,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:23,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 123 conjunts are in the unsatisfiable core [2023-11-26 11:59:23,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:23,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 11:59:23,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 11:59:23,944 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 23 treesize of output 15 [2023-11-26 11:59:23,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 11:59:23,972 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 11 [2023-11-26 11:59:24,191 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 11 [2023-11-26 11:59:24,196 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 23 treesize of output 15 [2023-11-26 11:59:24,399 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 [2023-11-26 11:59:24,409 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 [2023-11-26 11:59:24,620 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 [2023-11-26 11:59:24,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:59:24,652 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:24,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:24,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133900801] [2023-11-26 11:59:24,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:59:24,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950816670] [2023-11-26 11:59:24,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950816670] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:24,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:24,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-11-26 11:59:24,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581037425] [2023-11-26 11:59:24,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:24,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-26 11:59:24,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:24,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-26 11:59:24,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2023-11-26 11:59:24,655 INFO L87 Difference]: Start difference. First operand 208 states and 253 transitions. Second operand has 19 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:59:26,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:26,134 INFO L93 Difference]: Finished difference Result 288 states and 340 transitions. [2023-11-26 11:59:26,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-26 11:59:26,134 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-11-26 11:59:26,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:26,137 INFO L225 Difference]: With dead ends: 288 [2023-11-26 11:59:26,138 INFO L226 Difference]: Without dead ends: 287 [2023-11-26 11:59:26,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2023-11-26 11:59:26,139 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 202 mSDsluCounter, 1685 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 1808 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:26,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 1808 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-26 11:59:26,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2023-11-26 11:59:26,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 258. [2023-11-26 11:59:26,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 169 states have (on average 1.6331360946745561) internal successors, (276), 224 states have internal predecessors, (276), 27 states have call successors, (27), 10 states have call predecessors, (27), 12 states have return successors, (31), 27 states have call predecessors, (31), 27 states have call successors, (31) [2023-11-26 11:59:26,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 334 transitions. [2023-11-26 11:59:26,162 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 334 transitions. Word has length 27 [2023-11-26 11:59:26,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:26,163 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 334 transitions. [2023-11-26 11:59:26,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:59:26,163 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 334 transitions. [2023-11-26 11:59:26,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-26 11:59:26,164 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:26,164 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:26,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-26 11:59:26,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:26,379 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting func_to_recursive_line_33_to_70_0Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_47_to_56_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_47_to_56_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 48 more)] === [2023-11-26 11:59:26,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:26,380 INFO L85 PathProgramCache]: Analyzing trace with hash -389586584, now seen corresponding path program 1 times [2023-11-26 11:59:26,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:26,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860838974] [2023-11-26 11:59:26,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:26,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:26,412 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:59:26,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1529564382] [2023-11-26 11:59:26,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:26,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:26,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:26,414 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:26,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:59:26,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:26,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-26 11:59:26,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:26,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 11:59:26,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:59:26,794 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:26,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:26,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860838974] [2023-11-26 11:59:26,795 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:59:26,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529564382] [2023-11-26 11:59:26,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529564382] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:26,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:26,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:59:26,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740435238] [2023-11-26 11:59:26,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:26,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:59:26,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:26,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:59:26,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:59:26,797 INFO L87 Difference]: Start difference. First operand 258 states and 334 transitions. Second operand has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:59:27,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:27,014 INFO L93 Difference]: Finished difference Result 300 states and 349 transitions. [2023-11-26 11:59:27,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:59:27,015 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-11-26 11:59:27,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:27,018 INFO L225 Difference]: With dead ends: 300 [2023-11-26 11:59:27,018 INFO L226 Difference]: Without dead ends: 299 [2023-11-26 11:59:27,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:59:27,020 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 119 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:27,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 831 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:59:27,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2023-11-26 11:59:27,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 269. [2023-11-26 11:59:27,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 179 states have (on average 1.6089385474860336) internal successors, (288), 232 states have internal predecessors, (288), 27 states have call successors, (27), 11 states have call predecessors, (27), 13 states have return successors, (31), 29 states have call predecessors, (31), 27 states have call successors, (31) [2023-11-26 11:59:27,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 346 transitions. [2023-11-26 11:59:27,052 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 346 transitions. Word has length 27 [2023-11-26 11:59:27,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:27,053 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 346 transitions. [2023-11-26 11:59:27,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:59:27,053 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 346 transitions. [2023-11-26 11:59:27,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-26 11:59:27,054 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:27,054 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:27,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:27,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 11:59:27,262 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting func_to_recursive_line_47_to_56_0Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_47_to_56_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_47_to_56_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 48 more)] === [2023-11-26 11:59:27,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:27,262 INFO L85 PathProgramCache]: Analyzing trace with hash -2024146391, now seen corresponding path program 1 times [2023-11-26 11:59:27,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:27,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676134653] [2023-11-26 11:59:27,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:27,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:27,296 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:59:27,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [744954515] [2023-11-26 11:59:27,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:27,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:27,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:27,298 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:27,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:59:27,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:27,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 123 conjunts are in the unsatisfiable core [2023-11-26 11:59:27,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:27,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 11:59:27,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 11:59:27,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 11:59:27,729 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 11 [2023-11-26 11:59:27,737 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 11 [2023-11-26 11:59:27,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 11:59:27,906 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 11 [2023-11-26 11:59:27,911 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 23 treesize of output 15 [2023-11-26 11:59:28,093 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 11 treesize of output 7 [2023-11-26 11:59:28,248 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 [2023-11-26 11:59:28,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:59:28,275 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:28,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:28,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676134653] [2023-11-26 11:59:28,275 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:59:28,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744954515] [2023-11-26 11:59:28,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744954515] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:28,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:28,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-26 11:59:28,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461075638] [2023-11-26 11:59:28,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:28,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 11:59:28,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:28,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 11:59:28,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:59:28,278 INFO L87 Difference]: Start difference. First operand 269 states and 346 transitions. Second operand has 14 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 11:59:29,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:29,231 INFO L93 Difference]: Finished difference Result 294 states and 346 transitions. [2023-11-26 11:59:29,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 11:59:29,232 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2023-11-26 11:59:29,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:29,234 INFO L225 Difference]: With dead ends: 294 [2023-11-26 11:59:29,235 INFO L226 Difference]: Without dead ends: 293 [2023-11-26 11:59:29,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-11-26 11:59:29,236 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 379 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:29,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 1119 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 11:59:29,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2023-11-26 11:59:29,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 269. [2023-11-26 11:59:29,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 179 states have (on average 1.6033519553072626) internal successors, (287), 232 states have internal predecessors, (287), 27 states have call successors, (27), 11 states have call predecessors, (27), 13 states have return successors, (31), 29 states have call predecessors, (31), 27 states have call successors, (31) [2023-11-26 11:59:29,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 345 transitions. [2023-11-26 11:59:29,266 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 345 transitions. Word has length 28 [2023-11-26 11:59:29,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:29,267 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 345 transitions. [2023-11-26 11:59:29,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 11:59:29,267 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 345 transitions. [2023-11-26 11:59:29,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-26 11:59:29,272 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:29,272 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:29,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:29,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-26 11:59:29,480 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting func_to_recursive_line_33_to_70_0Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_47_to_56_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_47_to_56_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 48 more)] === [2023-11-26 11:59:29,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:29,481 INFO L85 PathProgramCache]: Analyzing trace with hash 807717900, now seen corresponding path program 1 times [2023-11-26 11:59:29,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:29,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303237384] [2023-11-26 11:59:29,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:29,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:29,524 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:59:29,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1135842828] [2023-11-26 11:59:29,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:29,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:29,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:29,526 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:29,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:59:29,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:29,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-26 11:59:29,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:29,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 11:59:29,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 11:59:29,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:59:29,958 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:29,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:29,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303237384] [2023-11-26 11:59:29,959 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:59:29,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135842828] [2023-11-26 11:59:29,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135842828] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:29,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:29,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:59:29,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639388296] [2023-11-26 11:59:29,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:29,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:59:29,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:29,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:59:29,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:59:29,962 INFO L87 Difference]: Start difference. First operand 269 states and 345 transitions. Second operand has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:59:30,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:30,684 INFO L93 Difference]: Finished difference Result 300 states and 351 transitions. [2023-11-26 11:59:30,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:59:30,685 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2023-11-26 11:59:30,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:30,689 INFO L225 Difference]: With dead ends: 300 [2023-11-26 11:59:30,689 INFO L226 Difference]: Without dead ends: 299 [2023-11-26 11:59:30,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:59:30,690 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 103 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:30,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 489 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 11:59:30,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2023-11-26 11:59:30,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 275. [2023-11-26 11:59:30,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 184 states have (on average 1.5869565217391304) internal successors, (292), 237 states have internal predecessors, (292), 27 states have call successors, (27), 12 states have call predecessors, (27), 14 states have return successors, (31), 29 states have call predecessors, (31), 27 states have call successors, (31) [2023-11-26 11:59:30,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 350 transitions. [2023-11-26 11:59:30,716 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 350 transitions. Word has length 28 [2023-11-26 11:59:30,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:30,716 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 350 transitions. [2023-11-26 11:59:30,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:59:30,717 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 350 transitions. [2023-11-26 11:59:30,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-26 11:59:30,718 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:30,718 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:30,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-26 11:59:30,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:30,926 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting func_to_recursive_line_47_to_56_0Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_47_to_56_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_47_to_56_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 48 more)] === [2023-11-26 11:59:30,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:30,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1675971362, now seen corresponding path program 1 times [2023-11-26 11:59:30,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:30,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443344827] [2023-11-26 11:59:30,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:30,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:30,961 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:59:30,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1008182020] [2023-11-26 11:59:30,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:30,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:30,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:30,963 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:31,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:59:31,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:31,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 124 conjunts are in the unsatisfiable core [2023-11-26 11:59:31,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:31,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 11:59:31,394 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 23 treesize of output 15 [2023-11-26 11:59:31,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 11:59:31,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 11:59:31,421 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 11 [2023-11-26 11:59:31,628 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 11 [2023-11-26 11:59:31,642 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 23 treesize of output 15 [2023-11-26 11:59:31,828 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 [2023-11-26 11:59:31,835 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 [2023-11-26 11:59:32,077 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 [2023-11-26 11:59:32,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:59:32,135 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:32,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:32,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443344827] [2023-11-26 11:59:32,136 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:59:32,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008182020] [2023-11-26 11:59:32,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008182020] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:32,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:32,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-11-26 11:59:32,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358315083] [2023-11-26 11:59:32,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:32,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-26 11:59:32,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:32,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-26 11:59:32,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2023-11-26 11:59:32,138 INFO L87 Difference]: Start difference. First operand 275 states and 350 transitions. Second operand has 20 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:59:33,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:33,734 INFO L93 Difference]: Finished difference Result 299 states and 350 transitions. [2023-11-26 11:59:33,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-26 11:59:33,742 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2023-11-26 11:59:33,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:33,745 INFO L225 Difference]: With dead ends: 299 [2023-11-26 11:59:33,745 INFO L226 Difference]: Without dead ends: 298 [2023-11-26 11:59:33,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2023-11-26 11:59:33,750 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 166 mSDsluCounter, 1707 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1832 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:33,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 1832 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-26 11:59:33,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2023-11-26 11:59:33,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 275. [2023-11-26 11:59:33,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 184 states have (on average 1.5815217391304348) internal successors, (291), 237 states have internal predecessors, (291), 27 states have call successors, (27), 12 states have call predecessors, (27), 14 states have return successors, (31), 29 states have call predecessors, (31), 27 states have call successors, (31) [2023-11-26 11:59:33,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 349 transitions. [2023-11-26 11:59:33,778 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 349 transitions. Word has length 29 [2023-11-26 11:59:33,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:33,779 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 349 transitions. [2023-11-26 11:59:33,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:59:33,779 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 349 transitions. [2023-11-26 11:59:33,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-26 11:59:33,781 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:33,781 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:33,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:33,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 11:59:33,989 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting func_to_recursive_line_33_to_70_0Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_47_to_56_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_47_to_56_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 48 more)] === [2023-11-26 11:59:33,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:33,989 INFO L85 PathProgramCache]: Analyzing trace with hash -730548758, now seen corresponding path program 1 times [2023-11-26 11:59:33,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:33,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222738341] [2023-11-26 11:59:33,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:33,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:34,033 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:59:34,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [27636507] [2023-11-26 11:59:34,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:34,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:34,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:34,035 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:34,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:59:34,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:34,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-26 11:59:34,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:34,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 11:59:34,347 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 [2023-11-26 11:59:34,480 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 [2023-11-26 11:59:34,485 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 [2023-11-26 11:59:34,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:59:34,498 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:34,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:34,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222738341] [2023-11-26 11:59:34,498 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:59:34,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27636507] [2023-11-26 11:59:34,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27636507] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:34,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:34,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:59:34,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887429346] [2023-11-26 11:59:34,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:34,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:59:34,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:34,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:59:34,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:59:34,501 INFO L87 Difference]: Start difference. First operand 275 states and 349 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:59:39,335 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] [2023-11-26 11:59:43,371 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] [2023-11-26 11:59:43,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:43,418 INFO L93 Difference]: Finished difference Result 318 states and 367 transitions. [2023-11-26 11:59:43,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:59:43,419 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2023-11-26 11:59:43,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:43,421 INFO L225 Difference]: With dead ends: 318 [2023-11-26 11:59:43,421 INFO L226 Difference]: Without dead ends: 317 [2023-11-26 11:59:43,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:59:43,423 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 156 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:43,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 552 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 672 Invalid, 2 Unknown, 0 Unchecked, 8.8s Time] [2023-11-26 11:59:43,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2023-11-26 11:59:43,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 276. [2023-11-26 11:59:43,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 185 states have (on average 1.5783783783783785) internal successors, (292), 238 states have internal predecessors, (292), 27 states have call successors, (27), 12 states have call predecessors, (27), 14 states have return successors, (31), 29 states have call predecessors, (31), 27 states have call successors, (31) [2023-11-26 11:59:43,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 350 transitions. [2023-11-26 11:59:43,449 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 350 transitions. Word has length 29 [2023-11-26 11:59:43,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:43,449 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 350 transitions. [2023-11-26 11:59:43,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:59:43,450 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 350 transitions. [2023-11-26 11:59:43,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-26 11:59:43,451 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:43,451 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:43,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:43,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-26 11:59:43,658 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting func_to_recursive_line_47_to_56_0Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_47_to_56_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_47_to_56_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 48 more)] === [2023-11-26 11:59:43,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:43,658 INFO L85 PathProgramCache]: Analyzing trace with hash 415504715, now seen corresponding path program 1 times [2023-11-26 11:59:43,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:43,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692785711] [2023-11-26 11:59:43,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:43,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:43,690 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:59:43,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [625833949] [2023-11-26 11:59:43,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:43,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:43,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:43,692 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:43,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 11:59:43,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:43,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 68 conjunts are in the unsatisfiable core [2023-11-26 11:59:43,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:43,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 11:59:44,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 11:59:44,339 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 [2023-11-26 11:59:44,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:59:44,424 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:44,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:44,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692785711] [2023-11-26 11:59:44,425 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:59:44,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625833949] [2023-11-26 11:59:44,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625833949] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:44,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:44,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-11-26 11:59:44,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918631253] [2023-11-26 11:59:44,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:44,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-26 11:59:44,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:44,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 11:59:44,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2023-11-26 11:59:44,427 INFO L87 Difference]: Start difference. First operand 276 states and 350 transitions. Second operand has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:59:45,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:45,260 INFO L93 Difference]: Finished difference Result 306 states and 352 transitions. [2023-11-26 11:59:45,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-26 11:59:45,261 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2023-11-26 11:59:45,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:45,264 INFO L225 Difference]: With dead ends: 306 [2023-11-26 11:59:45,264 INFO L226 Difference]: Without dead ends: 305 [2023-11-26 11:59:45,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2023-11-26 11:59:45,265 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 185 mSDsluCounter, 1373 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 1508 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:45,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 1508 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 11:59:45,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2023-11-26 11:59:45,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 276. [2023-11-26 11:59:45,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 185 states have (on average 1.5675675675675675) internal successors, (290), 238 states have internal predecessors, (290), 27 states have call successors, (27), 12 states have call predecessors, (27), 14 states have return successors, (31), 29 states have call predecessors, (31), 27 states have call successors, (31) [2023-11-26 11:59:45,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 348 transitions. [2023-11-26 11:59:45,292 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 348 transitions. Word has length 30 [2023-11-26 11:59:45,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:45,292 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 348 transitions. [2023-11-26 11:59:45,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:59:45,293 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 348 transitions. [2023-11-26 11:59:45,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-26 11:59:45,293 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:45,294 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:45,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:45,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-26 11:59:45,503 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting func_to_recursive_line_33_to_70_0Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_47_to_56_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_47_to_56_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 48 more)] === [2023-11-26 11:59:45,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:45,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1172174898, now seen corresponding path program 1 times [2023-11-26 11:59:45,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:45,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845147258] [2023-11-26 11:59:45,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:45,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:45,532 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:59:45,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936493008] [2023-11-26 11:59:45,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:45,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:45,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:45,534 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:45,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 11:59:45,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:45,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-26 11:59:45,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:45,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 11:59:45,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 11:59:45,992 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 [2023-11-26 11:59:45,997 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 [2023-11-26 11:59:46,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:59:46,014 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:46,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:46,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845147258] [2023-11-26 11:59:46,015 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:59:46,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936493008] [2023-11-26 11:59:46,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936493008] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:46,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:46,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:59:46,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231752392] [2023-11-26 11:59:46,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:46,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:59:46,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:46,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:59:46,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:59:46,017 INFO L87 Difference]: Start difference. First operand 276 states and 348 transitions. Second operand has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:59:50,943 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] [2023-11-26 11:59:54,979 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] [2023-11-26 11:59:55,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:55,020 INFO L93 Difference]: Finished difference Result 316 states and 364 transitions. [2023-11-26 11:59:55,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:59:55,020 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-11-26 11:59:55,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:55,023 INFO L225 Difference]: With dead ends: 316 [2023-11-26 11:59:55,023 INFO L226 Difference]: Without dead ends: 315 [2023-11-26 11:59:55,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:59:55,024 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 151 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:55,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 567 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 661 Invalid, 2 Unknown, 0 Unchecked, 8.9s Time] [2023-11-26 11:59:55,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2023-11-26 11:59:55,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 277. [2023-11-26 11:59:55,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 186 states have (on average 1.564516129032258) internal successors, (291), 239 states have internal predecessors, (291), 27 states have call successors, (27), 12 states have call predecessors, (27), 14 states have return successors, (31), 29 states have call predecessors, (31), 27 states have call successors, (31) [2023-11-26 11:59:55,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 349 transitions. [2023-11-26 11:59:55,049 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 349 transitions. Word has length 30 [2023-11-26 11:59:55,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:55,050 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 349 transitions. [2023-11-26 11:59:55,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:59:55,050 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 349 transitions. [2023-11-26 11:59:55,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-26 11:59:55,070 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:55,070 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:55,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-26 11:59:55,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-26 11:59:55,277 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting func_to_recursive_line_33_to_70_0Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_47_to_56_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_47_to_56_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 48 more)] === [2023-11-26 11:59:55,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:55,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1977683348, now seen corresponding path program 1 times [2023-11-26 11:59:55,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:55,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877698741] [2023-11-26 11:59:55,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:55,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:55,307 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:59:55,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [985200314] [2023-11-26 11:59:55,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:55,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:55,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:55,310 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:55,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-26 11:59:55,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:55,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-26 11:59:55,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:55,579 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 11 treesize of output 7 [2023-11-26 11:59:55,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:59:55,719 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:55,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:55,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877698741] [2023-11-26 11:59:55,719 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:59:55,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985200314] [2023-11-26 11:59:55,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985200314] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:55,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:55,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:59:55,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403777133] [2023-11-26 11:59:55,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:55,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:59:55,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:55,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:59:55,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:59:55,722 INFO L87 Difference]: Start difference. First operand 277 states and 349 transitions. Second operand has 9 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:59:55,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:55,954 INFO L93 Difference]: Finished difference Result 314 states and 359 transitions. [2023-11-26 11:59:55,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:59:55,955 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-11-26 11:59:55,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:55,958 INFO L225 Difference]: With dead ends: 314 [2023-11-26 11:59:55,958 INFO L226 Difference]: Without dead ends: 313 [2023-11-26 11:59:55,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:59:55,967 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 128 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:55,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 853 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:59:55,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2023-11-26 11:59:55,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 281. [2023-11-26 11:59:55,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 190 states have (on average 1.568421052631579) internal successors, (298), 243 states have internal predecessors, (298), 27 states have call successors, (27), 12 states have call predecessors, (27), 14 states have return successors, (31), 29 states have call predecessors, (31), 27 states have call successors, (31) [2023-11-26 11:59:55,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 356 transitions. [2023-11-26 11:59:55,993 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 356 transitions. Word has length 31 [2023-11-26 11:59:55,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:55,994 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 356 transitions. [2023-11-26 11:59:55,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:59:55,994 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 356 transitions. [2023-11-26 11:59:55,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-26 11:59:55,995 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:55,995 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:56,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:56,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-26 11:59:56,207 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting func_to_recursive_line_33_to_70_0Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_47_to_56_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_47_to_56_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 48 more)] === [2023-11-26 11:59:56,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:56,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1178641520, now seen corresponding path program 1 times [2023-11-26 11:59:56,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:56,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509408515] [2023-11-26 11:59:56,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:56,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:56,236 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:59:56,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1132002243] [2023-11-26 11:59:56,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:56,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:56,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:56,238 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:56,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-26 11:59:56,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:56,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-26 11:59:56,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:56,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 11:59:56,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 11:59:56,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 11:59:56,836 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 [2023-11-26 11:59:56,841 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 [2023-11-26 11:59:56,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:59:56,884 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:56,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:56,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509408515] [2023-11-26 11:59:56,884 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:59:56,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132002243] [2023-11-26 11:59:56,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132002243] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:56,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:56,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:59:56,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671715982] [2023-11-26 11:59:56,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:56,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:59:56,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:56,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:59:56,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:59:56,886 INFO L87 Difference]: Start difference. First operand 281 states and 356 transitions. Second operand has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:59:57,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:57,802 INFO L93 Difference]: Finished difference Result 309 states and 359 transitions. [2023-11-26 11:59:57,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:59:57,802 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2023-11-26 11:59:57,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:57,805 INFO L225 Difference]: With dead ends: 309 [2023-11-26 11:59:57,805 INFO L226 Difference]: Without dead ends: 308 [2023-11-26 11:59:57,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:59:57,806 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 119 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:57,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 429 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 11:59:57,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2023-11-26 11:59:57,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 283. [2023-11-26 11:59:57,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 192 states have (on average 1.5625) internal successors, (300), 245 states have internal predecessors, (300), 27 states have call successors, (27), 12 states have call predecessors, (27), 14 states have return successors, (31), 29 states have call predecessors, (31), 27 states have call successors, (31) [2023-11-26 11:59:57,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 358 transitions. [2023-11-26 11:59:57,832 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 358 transitions. Word has length 32 [2023-11-26 11:59:57,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:57,833 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 358 transitions. [2023-11-26 11:59:57,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:59:57,833 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 358 transitions. [2023-11-26 11:59:57,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-26 11:59:57,834 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:57,834 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:57,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:58,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-26 11:59:58,042 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting func_to_recursive_line_47_to_56_0Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_47_to_56_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_47_to_56_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 48 more)] === [2023-11-26 11:59:58,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:58,043 INFO L85 PathProgramCache]: Analyzing trace with hash -2098633479, now seen corresponding path program 1 times [2023-11-26 11:59:58,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:58,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099402095] [2023-11-26 11:59:58,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:58,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:58,075 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:59:58,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1398518981] [2023-11-26 11:59:58,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:58,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:58,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:58,077 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:58,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ce7d-77c6-439c-a4e1-65618a0c55ce/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-26 11:59:58,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:58,413 INFO L262 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 124 conjunts are in the unsatisfiable core [2023-11-26 11:59:58,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:58,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 11:59:58,555 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 11 [2023-11-26 11:59:58,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 11:59:58,579 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 23 treesize of output 15 [2023-11-26 11:59:58,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 11:59:58,823 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 11 [2023-11-26 11:59:58,831 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 23 treesize of output 15 [2023-11-26 11:59:59,068 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 [2023-11-26 11:59:59,076 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 [2023-11-26 11:59:59,460 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 [2023-11-26 11:59:59,473 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 [2023-11-26 11:59:59,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:59:59,505 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:59,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:59,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099402095] [2023-11-26 11:59:59,505 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:59:59,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398518981] [2023-11-26 11:59:59,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398518981] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:59,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:59,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-11-26 11:59:59,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045786792] [2023-11-26 11:59:59,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:59,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-26 11:59:59,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:59,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-26 11:59:59,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2023-11-26 11:59:59,508 INFO L87 Difference]: Start difference. First operand 283 states and 358 transitions. Second operand has 20 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 states have internal predecessors, (28), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 12:00:03,560 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] [2023-11-26 12:00:07,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-26 12:00:12,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]