./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ --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 ab365eb388b6073fe9b18a07d6de0f6e90e5d145e13f5e07857ef91530e5178e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:41:39,776 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:41:39,861 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-23 22:41:39,867 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:41:39,868 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:41:39,891 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:41:39,892 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:41:39,893 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:41:39,894 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:41:39,895 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:41:39,895 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:41:39,896 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:41:39,897 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:41:39,898 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:41:39,898 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:41:39,899 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:41:39,900 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:41:39,900 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:41:39,901 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:41:39,901 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:41:39,902 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:41:39,905 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:41:39,905 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:41:39,906 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:41:39,906 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-23 22:41:39,907 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 22:41:39,907 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:41:39,908 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:41:39,908 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:41:39,909 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:41:39,910 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:41:39,911 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:41:39,911 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:41:39,912 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:41:39,912 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:41:39,912 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:41:39,913 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:41:39,913 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:41:39,913 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:41:39,914 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:41:39,915 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:41:39,915 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:41:39,915 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:41:39,916 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:41:39,916 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_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab365eb388b6073fe9b18a07d6de0f6e90e5d145e13f5e07857ef91530e5178e [2023-11-23 22:41:40,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:41:40,256 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:41:40,259 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:41:40,260 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:41:40,260 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:41:40,262 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu.c [2023-11-23 22:41:43,499 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:41:43,688 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:41:43,689 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu.c [2023-11-23 22:41:43,698 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/data/feed2782a/1bc3fa0c7ee64fe3a8dd02387761f57b/FLAG362db718a [2023-11-23 22:41:43,713 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/data/feed2782a/1bc3fa0c7ee64fe3a8dd02387761f57b [2023-11-23 22:41:43,716 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:41:43,718 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:41:43,720 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:41:43,720 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:41:43,726 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:41:43,727 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:41:43" (1/1) ... [2023-11-23 22:41:43,728 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63713713 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:41:43, skipping insertion in model container [2023-11-23 22:41:43,728 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:41:43" (1/1) ... [2023-11-23 22:41:43,752 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:41:43,941 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:41:43,953 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:41:43,988 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:41:44,003 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:41:44,003 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:41:44 WrapperNode [2023-11-23 22:41:44,004 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:41:44,005 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:41:44,005 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:41:44,005 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:41:44,014 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:41:44" (1/1) ... [2023-11-23 22:41:44,024 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:41:44" (1/1) ... [2023-11-23 22:41:44,070 INFO L138 Inliner]: procedures = 16, calls = 100, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 197 [2023-11-23 22:41:44,071 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:41:44,072 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:41:44,072 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:41:44,072 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:41:44,084 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:41:44" (1/1) ... [2023-11-23 22:41:44,089 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:41:44" (1/1) ... [2023-11-23 22:41:44,095 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:41:44" (1/1) ... [2023-11-23 22:41:44,122 INFO L189 HeapSplitter]: Split 66 memory accesses to 6 slices as follows [2, 12, 5, 11, 21, 15] [2023-11-23 22:41:44,123 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:41:44" (1/1) ... [2023-11-23 22:41:44,123 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:41:44" (1/1) ... [2023-11-23 22:41:44,143 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:41:44" (1/1) ... [2023-11-23 22:41:44,145 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:41:44" (1/1) ... [2023-11-23 22:41:44,148 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:41:44" (1/1) ... [2023-11-23 22:41:44,159 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:41:44" (1/1) ... [2023-11-23 22:41:44,164 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:41:44,165 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:41:44,165 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:41:44,165 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:41:44,166 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:41:44" (1/1) ... [2023-11-23 22:41:44,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:41:44,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:41:44,221 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:41:44,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:41:44,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:41:44,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:41:44,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 22:41:44,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 22:41:44,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-23 22:41:44,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-23 22:41:44,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-23 22:41:44,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 22:41:44,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 22:41:44,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 22:41:44,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 22:41:44,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-23 22:41:44,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-23 22:41:44,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-23 22:41:44,269 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_27_to_39_0 [2023-11-23 22:41:44,270 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_27_to_39_0 [2023-11-23 22:41:44,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:41:44,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:41:44,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 22:41:44,272 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 22:41:44,272 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-23 22:41:44,272 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-23 22:41:44,272 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-23 22:41:44,273 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-23 22:41:44,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 22:41:44,274 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 22:41:44,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 22:41:44,431 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:41:44,434 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:41:45,422 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:41:45,470 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:41:45,470 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 22:41:45,471 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:41:45 BoogieIcfgContainer [2023-11-23 22:41:45,471 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:41:45,473 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:41:45,474 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:41:45,477 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:41:45,478 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:41:43" (1/3) ... [2023-11-23 22:41:45,478 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fee5355 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:41:45, skipping insertion in model container [2023-11-23 22:41:45,479 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:41:44" (2/3) ... [2023-11-23 22:41:45,484 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fee5355 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:41:45, skipping insertion in model container [2023-11-23 22:41:45,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:41:45" (3/3) ... [2023-11-23 22:41:45,485 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_cohencu.c [2023-11-23 22:41:45,507 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:41:45,507 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 138 error locations. [2023-11-23 22:41:45,578 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:41:45,586 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;@15734e14, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:41:45,586 INFO L358 AbstractCegarLoop]: Starting to check reachability of 138 error locations. [2023-11-23 22:41:45,591 INFO L276 IsEmpty]: Start isEmpty. Operand has 312 states, 158 states have (on average 1.8924050632911393) internal successors, (299), 297 states have internal predecessors, (299), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-23 22:41:45,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-23 22:41:45,597 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:41:45,598 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 22:41:45,599 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting func_to_recursive_line_27_to_39_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_27_to_39_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_27_to_39_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-23 22:41:45,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:41:45,605 INFO L85 PathProgramCache]: Analyzing trace with hash 370391600, now seen corresponding path program 1 times [2023-11-23 22:41:45,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:41:45,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769280732] [2023-11-23 22:41:45,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:45,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:41:45,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:41:46,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:41:46,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:41:46,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769280732] [2023-11-23 22:41:46,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769280732] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:41:46,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:41:46,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:41:46,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128817875] [2023-11-23 22:41:46,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:41:46,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:41:46,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:41:46,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:41:46,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:41:46,310 INFO L87 Difference]: Start difference. First operand has 312 states, 158 states have (on average 1.8924050632911393) internal successors, (299), 297 states have internal predecessors, (299), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 6 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:41:46,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:41:46,749 INFO L93 Difference]: Finished difference Result 910 states and 976 transitions. [2023-11-23 22:41:46,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:41:46,752 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-23 22:41:46,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:41:46,774 INFO L225 Difference]: With dead ends: 910 [2023-11-23 22:41:46,775 INFO L226 Difference]: Without dead ends: 595 [2023-11-23 22:41:46,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:41:46,790 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 379 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 1475 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:41:46,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 1475 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 22:41:46,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2023-11-23 22:41:46,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 370. [2023-11-23 22:41:46,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 212 states have (on average 1.8537735849056605) internal successors, (393), 350 states have internal predecessors, (393), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2023-11-23 22:41:46,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 428 transitions. [2023-11-23 22:41:46,876 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 428 transitions. Word has length 5 [2023-11-23 22:41:46,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:41:46,877 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 428 transitions. [2023-11-23 22:41:46,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:41:46,877 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 428 transitions. [2023-11-23 22:41:46,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 22:41:46,879 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:41:46,879 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:41:46,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:41:46,880 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting func_to_recursive_line_27_to_39_0Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_27_to_39_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_27_to_39_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-23 22:41:46,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:41:46,881 INFO L85 PathProgramCache]: Analyzing trace with hash 2009196607, now seen corresponding path program 1 times [2023-11-23 22:41:46,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:41:46,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819801282] [2023-11-23 22:41:46,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:46,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:41:46,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:41:47,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-23 22:41:47,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:41:47,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:41:47,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:41:47,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819801282] [2023-11-23 22:41:47,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819801282] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:41:47,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:41:47,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:41:47,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265556174] [2023-11-23 22:41:47,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:41:47,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:41:47,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:41:47,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:41:47,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:41:47,133 INFO L87 Difference]: Start difference. First operand 370 states and 428 transitions. Second operand has 6 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 22:41:47,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:41:47,415 INFO L93 Difference]: Finished difference Result 595 states and 615 transitions. [2023-11-23 22:41:47,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:41:47,416 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-11-23 22:41:47,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:41:47,420 INFO L225 Difference]: With dead ends: 595 [2023-11-23 22:41:47,420 INFO L226 Difference]: Without dead ends: 591 [2023-11-23 22:41:47,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:41:47,427 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 377 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 1447 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:41:47,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 1447 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 22:41:47,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2023-11-23 22:41:47,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 370. [2023-11-23 22:41:47,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 212 states have (on average 1.8349056603773586) internal successors, (389), 350 states have internal predecessors, (389), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2023-11-23 22:41:47,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 424 transitions. [2023-11-23 22:41:47,471 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 424 transitions. Word has length 15 [2023-11-23 22:41:47,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:41:47,480 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 424 transitions. [2023-11-23 22:41:47,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 22:41:47,480 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 424 transitions. [2023-11-23 22:41:47,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 22:41:47,481 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:41:47,481 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:41:47,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 22:41:47,482 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting func_to_recursive_line_27_to_39_0Err8ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_27_to_39_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_27_to_39_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-23 22:41:47,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:41:47,483 INFO L85 PathProgramCache]: Analyzing trace with hash 2015087747, now seen corresponding path program 1 times [2023-11-23 22:41:47,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:41:47,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140046246] [2023-11-23 22:41:47,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:47,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:41:47,510 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:41:47,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [274869216] [2023-11-23 22:41:47,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:47,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:41:47,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:41:47,519 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:41:47,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:41:47,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:41:47,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 22:41:47,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:41:47,920 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 17 treesize of output 9 [2023-11-23 22:41:47,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:41:47,934 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:41:47,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:41:47,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140046246] [2023-11-23 22:41:47,935 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:41:47,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274869216] [2023-11-23 22:41:47,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274869216] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:41:47,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:41:47,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:41:47,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786228221] [2023-11-23 22:41:47,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:41:47,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:41:47,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:41:47,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:41:47,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:41:47,947 INFO L87 Difference]: Start difference. First operand 370 states and 424 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 22:41:50,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 22:41:50,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:41:50,258 INFO L93 Difference]: Finished difference Result 372 states and 426 transitions. [2023-11-23 22:41:50,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 22:41:50,259 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-11-23 22:41:50,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:41:50,264 INFO L225 Difference]: With dead ends: 372 [2023-11-23 22:41:50,264 INFO L226 Difference]: Without dead ends: 371 [2023-11-23 22:41:50,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:41:50,268 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 399 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:41:50,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 1020 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 126 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2023-11-23 22:41:50,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2023-11-23 22:41:50,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2023-11-23 22:41:50,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 213 states have (on average 1.8215962441314555) internal successors, (388), 350 states have internal predecessors, (388), 17 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2023-11-23 22:41:50,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 424 transitions. [2023-11-23 22:41:50,294 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 424 transitions. Word has length 19 [2023-11-23 22:41:50,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:41:50,314 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 424 transitions. [2023-11-23 22:41:50,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 22:41:50,315 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 424 transitions. [2023-11-23 22:41:50,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-23 22:41:50,315 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:41:50,316 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:41:50,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 22:41:50,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:41:50,531 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting func_to_recursive_line_27_to_39_0Err9ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_27_to_39_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_27_to_39_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-23 22:41:50,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:41:50,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1956789228, now seen corresponding path program 1 times [2023-11-23 22:41:50,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:41:50,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301986831] [2023-11-23 22:41:50,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:50,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:41:50,569 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:41:50,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [563088594] [2023-11-23 22:41:50,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:50,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:41:50,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:41:50,571 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:41:50,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:41:50,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:41:50,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 22:41:50,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:41:50,781 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 [2023-11-23 22:41:50,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:41:50,792 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:41:50,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:41:50,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301986831] [2023-11-23 22:41:50,797 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:41:50,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563088594] [2023-11-23 22:41:50,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563088594] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:41:50,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:41:50,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:41:50,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082896651] [2023-11-23 22:41:50,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:41:50,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:41:50,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:41:50,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:41:50,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:41:50,799 INFO L87 Difference]: Start difference. First operand 371 states and 424 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 22:41:52,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 22:41:53,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:41:53,095 INFO L93 Difference]: Finished difference Result 371 states and 424 transitions. [2023-11-23 22:41:53,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 22:41:53,096 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-11-23 22:41:53,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:41:53,100 INFO L225 Difference]: With dead ends: 371 [2023-11-23 22:41:53,101 INFO L226 Difference]: Without dead ends: 370 [2023-11-23 22:41:53,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:41:53,104 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 389 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:41:53,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 1020 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 131 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2023-11-23 22:41:53,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2023-11-23 22:41:53,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 370. [2023-11-23 22:41:53,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 213 states have (on average 1.812206572769953) internal successors, (386), 349 states have internal predecessors, (386), 17 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2023-11-23 22:41:53,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 422 transitions. [2023-11-23 22:41:53,131 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 422 transitions. Word has length 20 [2023-11-23 22:41:53,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:41:53,131 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 422 transitions. [2023-11-23 22:41:53,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 22:41:53,132 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 422 transitions. [2023-11-23 22:41:53,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 22:41:53,133 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:41:53,133 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:41:53,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:41:53,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:41:53,351 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting func_to_recursive_line_27_to_39_0Err10ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_27_to_39_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_27_to_39_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-23 22:41:53,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:41:53,352 INFO L85 PathProgramCache]: Analyzing trace with hash -530923867, now seen corresponding path program 1 times [2023-11-23 22:41:53,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:41:53,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709633424] [2023-11-23 22:41:53,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:53,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:41:53,385 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:41:53,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1486449546] [2023-11-23 22:41:53,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:53,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:41:53,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:41:53,388 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:41:53,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:41:53,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:41:53,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 22:41:53,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:41:53,522 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 [2023-11-23 22:41:53,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:41:53,695 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:41:53,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:41:53,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709633424] [2023-11-23 22:41:53,696 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:41:53,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486449546] [2023-11-23 22:41:53,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486449546] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:41:53,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:41:53,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 22:41:53,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696025262] [2023-11-23 22:41:53,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:41:53,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 22:41:53,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:41:53,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 22:41:53,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:41:53,698 INFO L87 Difference]: Start difference. First operand 370 states and 422 transitions. Second operand has 8 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 22:41:54,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:41:54,026 INFO L93 Difference]: Finished difference Result 593 states and 612 transitions. [2023-11-23 22:41:54,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 22:41:54,027 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-11-23 22:41:54,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:41:54,030 INFO L225 Difference]: With dead ends: 593 [2023-11-23 22:41:54,030 INFO L226 Difference]: Without dead ends: 591 [2023-11-23 22:41:54,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-11-23 22:41:54,031 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 365 mSDsluCounter, 1511 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 1795 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:41:54,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 1795 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 22:41:54,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2023-11-23 22:41:54,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 452. [2023-11-23 22:41:54,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 289 states have (on average 1.8269896193771626) internal successors, (528), 425 states have internal predecessors, (528), 22 states have call successors, (22), 4 states have call predecessors, (22), 5 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-23 22:41:54,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 574 transitions. [2023-11-23 22:41:54,059 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 574 transitions. Word has length 21 [2023-11-23 22:41:54,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:41:54,059 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 574 transitions. [2023-11-23 22:41:54,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 22:41:54,060 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 574 transitions. [2023-11-23 22:41:54,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-23 22:41:54,060 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:41:54,060 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:41:54,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:41:54,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:41:54,283 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting func_to_recursive_line_27_to_39_0Err11ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_27_to_39_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_27_to_39_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-23 22:41:54,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:41:54,283 INFO L85 PathProgramCache]: Analyzing trace with hash 721229366, now seen corresponding path program 1 times [2023-11-23 22:41:54,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:41:54,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293658732] [2023-11-23 22:41:54,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:54,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:41:54,303 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:41:54,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2005985888] [2023-11-23 22:41:54,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:54,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:41:54,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:41:54,304 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:41:54,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 22:41:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:41:54,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-23 22:41:54,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:41:54,428 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 [2023-11-23 22:41:54,582 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 [2023-11-23 22:41:54,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:41:54,623 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:41:54,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:41:54,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293658732] [2023-11-23 22:41:54,623 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:41:54,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005985888] [2023-11-23 22:41:54,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005985888] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:41:54,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:41:54,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-23 22:41:54,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533501478] [2023-11-23 22:41:54,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:41:54,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 22:41:54,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:41:54,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 22:41:54,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-23 22:41:54,626 INFO L87 Difference]: Start difference. First operand 452 states and 574 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 22:41:55,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:41:55,251 INFO L93 Difference]: Finished difference Result 603 states and 622 transitions. [2023-11-23 22:41:55,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 22:41:55,252 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-11-23 22:41:55,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:41:55,256 INFO L225 Difference]: With dead ends: 603 [2023-11-23 22:41:55,256 INFO L226 Difference]: Without dead ends: 601 [2023-11-23 22:41:55,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-11-23 22:41:55,258 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 464 mSDsluCounter, 2100 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 2367 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 22:41:55,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [469 Valid, 2367 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 22:41:55,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2023-11-23 22:41:55,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 452. [2023-11-23 22:41:55,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 289 states have (on average 1.820069204152249) internal successors, (526), 425 states have internal predecessors, (526), 22 states have call successors, (22), 4 states have call predecessors, (22), 5 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-23 22:41:55,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 572 transitions. [2023-11-23 22:41:55,284 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 572 transitions. Word has length 22 [2023-11-23 22:41:55,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:41:55,285 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 572 transitions. [2023-11-23 22:41:55,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 22:41:55,285 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 572 transitions. [2023-11-23 22:41:55,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-23 22:41:55,286 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:41:55,286 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] [2023-11-23 22:41:55,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 22:41:55,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:41:55,509 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting func_to_recursive_line_27_to_39_0Err14ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_27_to_39_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_27_to_39_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-23 22:41:55,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:41:55,509 INFO L85 PathProgramCache]: Analyzing trace with hash 133250338, now seen corresponding path program 1 times [2023-11-23 22:41:55,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:41:55,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293368101] [2023-11-23 22:41:55,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:55,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:41:55,533 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:41:55,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2117448151] [2023-11-23 22:41:55,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:55,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:41:55,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:41:55,539 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:41:55,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 22:41:55,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:41:55,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 22:41:55,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:41:55,668 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 [2023-11-23 22:41:55,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 22:41:55,821 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:41:55,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:41:55,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293368101] [2023-11-23 22:41:55,822 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:41:55,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117448151] [2023-11-23 22:41:55,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117448151] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:41:55,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:41:55,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:41:55,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835373560] [2023-11-23 22:41:55,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:41:55,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 22:41:55,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:41:55,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 22:41:55,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:41:55,828 INFO L87 Difference]: Start difference. First operand 452 states and 572 transitions. Second operand has 7 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:41:56,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:41:56,093 INFO L93 Difference]: Finished difference Result 589 states and 608 transitions. [2023-11-23 22:41:56,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:41:56,094 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2023-11-23 22:41:56,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:41:56,099 INFO L225 Difference]: With dead ends: 589 [2023-11-23 22:41:56,099 INFO L226 Difference]: Without dead ends: 585 [2023-11-23 22:41:56,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:41:56,101 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 334 mSDsluCounter, 1452 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 1743 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:41:56,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 1743 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 22:41:56,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2023-11-23 22:41:56,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 452. [2023-11-23 22:41:56,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 289 states have (on average 1.806228373702422) internal successors, (522), 425 states have internal predecessors, (522), 22 states have call successors, (22), 4 states have call predecessors, (22), 5 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-23 22:41:56,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 568 transitions. [2023-11-23 22:41:56,132 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 568 transitions. Word has length 31 [2023-11-23 22:41:56,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:41:56,135 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 568 transitions. [2023-11-23 22:41:56,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:41:56,135 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 568 transitions. [2023-11-23 22:41:56,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-23 22:41:56,139 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:41:56,140 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:41:56,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 22:41:56,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:41:56,357 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting func_to_recursive_line_27_to_39_0Err18ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_27_to_39_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_27_to_39_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-23 22:41:56,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:41:56,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1037075609, now seen corresponding path program 1 times [2023-11-23 22:41:56,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:41:56,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86935496] [2023-11-23 22:41:56,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:56,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:41:56,383 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:41:56,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101870972] [2023-11-23 22:41:56,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:56,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:41:56,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:41:56,385 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:41:56,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 22:41:56,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:41:56,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-23 22:41:56,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:41:56,532 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 [2023-11-23 22:41:56,537 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 [2023-11-23 22:41:56,925 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 [2023-11-23 22:41:56,941 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 22:41:56,942 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:41:56,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:41:56,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86935496] [2023-11-23 22:41:56,942 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:41:56,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101870972] [2023-11-23 22:41:56,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101870972] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:41:56,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:41:56,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:41:56,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225967454] [2023-11-23 22:41:56,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:41:56,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 22:41:56,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:41:56,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 22:41:56,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:41:56,945 INFO L87 Difference]: Start difference. First operand 452 states and 568 transitions. Second operand has 7 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 22:41:59,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 22:41:59,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:41:59,397 INFO L93 Difference]: Finished difference Result 593 states and 612 transitions. [2023-11-23 22:41:59,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:41:59,398 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2023-11-23 22:41:59,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:41:59,402 INFO L225 Difference]: With dead ends: 593 [2023-11-23 22:41:59,402 INFO L226 Difference]: Without dead ends: 592 [2023-11-23 22:41:59,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:41:59,403 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 622 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 1196 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-23 22:41:59,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [627 Valid, 1196 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 256 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2023-11-23 22:41:59,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2023-11-23 22:41:59,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 452. [2023-11-23 22:41:59,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 289 states have (on average 1.8027681660899655) internal successors, (521), 425 states have internal predecessors, (521), 22 states have call successors, (22), 4 states have call predecessors, (22), 5 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-23 22:41:59,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 567 transitions. [2023-11-23 22:41:59,432 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 567 transitions. Word has length 41 [2023-11-23 22:41:59,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:41:59,432 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 567 transitions. [2023-11-23 22:41:59,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 22:41:59,433 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 567 transitions. [2023-11-23 22:41:59,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-23 22:41:59,434 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:41:59,434 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:41:59,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 22:41:59,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:41:59,647 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting func_to_recursive_line_27_to_39_0Err19ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_27_to_39_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_27_to_39_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-23 22:41:59,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:41:59,648 INFO L85 PathProgramCache]: Analyzing trace with hash 2084572886, now seen corresponding path program 1 times [2023-11-23 22:41:59,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:41:59,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69983917] [2023-11-23 22:41:59,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:59,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:41:59,669 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:41:59,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1108620849] [2023-11-23 22:41:59,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:59,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:41:59,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:41:59,671 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:41:59,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 22:41:59,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:41:59,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-23 22:41:59,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:41:59,843 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 [2023-11-23 22:41:59,848 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 [2023-11-23 22:42:00,320 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 22:42:00,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:42:00,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:42:00,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69983917] [2023-11-23 22:42:00,421 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:42:00,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108620849] [2023-11-23 22:42:00,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108620849] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:42:00,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:42:00,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-11-23 22:42:00,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298804291] [2023-11-23 22:42:00,422 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 22:42:00,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 22:42:00,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:42:00,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 22:42:00,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-11-23 22:42:00,424 INFO L87 Difference]: Start difference. First operand 452 states and 567 transitions. Second operand has 10 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 22:42:01,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:42:01,129 INFO L93 Difference]: Finished difference Result 592 states and 611 transitions. [2023-11-23 22:42:01,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 22:42:01,130 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2023-11-23 22:42:01,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:42:01,134 INFO L225 Difference]: With dead ends: 592 [2023-11-23 22:42:01,134 INFO L226 Difference]: Without dead ends: 591 [2023-11-23 22:42:01,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-11-23 22:42:01,135 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 541 mSDsluCounter, 1543 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 1803 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 22:42:01,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 1803 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 22:42:01,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2023-11-23 22:42:01,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 452. [2023-11-23 22:42:01,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 289 states have (on average 1.7993079584775087) internal successors, (520), 425 states have internal predecessors, (520), 22 states have call successors, (22), 4 states have call predecessors, (22), 5 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-23 22:42:01,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 566 transitions. [2023-11-23 22:42:01,159 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 566 transitions. Word has length 42 [2023-11-23 22:42:01,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:42:01,160 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 566 transitions. [2023-11-23 22:42:01,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 22:42:01,160 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 566 transitions. [2023-11-23 22:42:01,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-23 22:42:01,161 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:42:01,161 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:42:01,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-23 22:42:01,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:42:01,383 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting func_to_recursive_line_27_to_39_0Err20ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_27_to_39_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_27_to_39_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-23 22:42:01,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:42:01,384 INFO L85 PathProgramCache]: Analyzing trace with hash 197250107, now seen corresponding path program 1 times [2023-11-23 22:42:01,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:42:01,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096246208] [2023-11-23 22:42:01,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:01,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:42:01,403 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:42:01,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1824147560] [2023-11-23 22:42:01,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:01,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:42:01,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:42:01,406 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:42:01,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 22:42:01,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:42:01,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 22:42:01,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:42:01,562 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 [2023-11-23 22:42:01,725 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 [2023-11-23 22:42:01,736 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 22:42:01,736 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:42:01,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:42:01,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096246208] [2023-11-23 22:42:01,737 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:42:01,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824147560] [2023-11-23 22:42:01,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824147560] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:42:01,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:42:01,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:42:01,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154664648] [2023-11-23 22:42:01,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:42:01,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 22:42:01,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:42:01,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 22:42:01,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:42:01,739 INFO L87 Difference]: Start difference. First operand 452 states and 566 transitions. Second operand has 7 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 22:42:03,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 22:42:05,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 22:42:08,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 22:42:08,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:42:08,051 INFO L93 Difference]: Finished difference Result 587 states and 606 transitions. [2023-11-23 22:42:08,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 22:42:08,051 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2023-11-23 22:42:08,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:42:08,055 INFO L225 Difference]: With dead ends: 587 [2023-11-23 22:42:08,055 INFO L226 Difference]: Without dead ends: 586 [2023-11-23 22:42:08,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:42:08,057 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 352 mSDsluCounter, 1305 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 17 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-11-23 22:42:08,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 1580 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 194 Invalid, 3 Unknown, 0 Unchecked, 6.3s Time] [2023-11-23 22:42:08,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2023-11-23 22:42:08,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 452. [2023-11-23 22:42:08,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 289 states have (on average 1.7958477508650519) internal successors, (519), 425 states have internal predecessors, (519), 22 states have call successors, (22), 4 states have call predecessors, (22), 5 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-23 22:42:08,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 565 transitions. [2023-11-23 22:42:08,084 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 565 transitions. Word has length 43 [2023-11-23 22:42:08,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:42:08,085 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 565 transitions. [2023-11-23 22:42:08,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 22:42:08,085 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 565 transitions. [2023-11-23 22:42:08,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-23 22:42:08,089 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:42:08,089 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:42:08,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 22:42:08,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 22:42:08,292 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting func_to_recursive_line_27_to_39_0Err21ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_27_to_39_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_27_to_39_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-23 22:42:08,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:42:08,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1819786104, now seen corresponding path program 1 times [2023-11-23 22:42:08,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:42:08,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882142263] [2023-11-23 22:42:08,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:08,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:42:08,337 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:42:08,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1129121] [2023-11-23 22:42:08,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:08,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:42:08,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:42:08,339 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:42:08,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 22:42:08,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:42:08,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 22:42:08,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:42:08,474 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 [2023-11-23 22:42:08,635 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 [2023-11-23 22:42:08,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 22:42:08,647 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:42:08,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:42:08,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882142263] [2023-11-23 22:42:08,648 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:42:08,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129121] [2023-11-23 22:42:08,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129121] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:42:08,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:42:08,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:42:08,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970468114] [2023-11-23 22:42:08,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:42:08,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 22:42:08,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:42:08,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 22:42:08,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:42:08,655 INFO L87 Difference]: Start difference. First operand 452 states and 565 transitions. Second operand has 7 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 22:42:08,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:42:08,960 INFO L93 Difference]: Finished difference Result 586 states and 605 transitions. [2023-11-23 22:42:08,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 22:42:08,961 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2023-11-23 22:42:08,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:42:08,965 INFO L225 Difference]: With dead ends: 586 [2023-11-23 22:42:08,965 INFO L226 Difference]: Without dead ends: 585 [2023-11-23 22:42:08,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:42:08,966 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 526 mSDsluCounter, 1104 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 1380 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:42:08,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [531 Valid, 1380 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 22:42:08,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2023-11-23 22:42:08,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 452. [2023-11-23 22:42:08,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 289 states have (on average 1.792387543252595) internal successors, (518), 425 states have internal predecessors, (518), 22 states have call successors, (22), 4 states have call predecessors, (22), 5 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-23 22:42:08,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 564 transitions. [2023-11-23 22:42:08,992 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 564 transitions. Word has length 44 [2023-11-23 22:42:08,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:42:08,992 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 564 transitions. [2023-11-23 22:42:08,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 22:42:08,993 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 564 transitions. [2023-11-23 22:42:08,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-23 22:42:08,993 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:42:08,994 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:42:09,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 22:42:09,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-23 22:42:09,207 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting func_to_recursive_line_27_to_39_0Err22ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_27_to_39_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_27_to_39_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-23 22:42:09,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:42:09,208 INFO L85 PathProgramCache]: Analyzing trace with hash 578794461, now seen corresponding path program 1 times [2023-11-23 22:42:09,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:42:09,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697105727] [2023-11-23 22:42:09,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:09,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:42:09,225 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:42:09,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1250638676] [2023-11-23 22:42:09,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:09,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:42:09,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:42:09,227 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:42:09,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 22:42:09,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:42:09,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-23 22:42:09,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:42:09,363 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 [2023-11-23 22:42:09,529 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 [2023-11-23 22:42:09,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 22:42:09,557 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:42:09,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:42:09,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697105727] [2023-11-23 22:42:09,558 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:42:09,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250638676] [2023-11-23 22:42:09,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250638676] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:42:09,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:42:09,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 22:42:09,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724524851] [2023-11-23 22:42:09,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:42:09,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 22:42:09,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:42:09,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 22:42:09,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:42:09,560 INFO L87 Difference]: Start difference. First operand 452 states and 564 transitions. Second operand has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 22:42:09,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:42:09,917 INFO L93 Difference]: Finished difference Result 585 states and 604 transitions. [2023-11-23 22:42:09,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 22:42:09,918 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2023-11-23 22:42:09,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:42:09,921 INFO L225 Difference]: With dead ends: 585 [2023-11-23 22:42:09,922 INFO L226 Difference]: Without dead ends: 584 [2023-11-23 22:42:09,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-11-23 22:42:09,923 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 344 mSDsluCounter, 1684 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 1961 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 22:42:09,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 1961 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 22:42:09,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2023-11-23 22:42:09,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 452. [2023-11-23 22:42:09,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 289 states have (on average 1.7889273356401385) internal successors, (517), 425 states have internal predecessors, (517), 22 states have call successors, (22), 4 states have call predecessors, (22), 5 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-23 22:42:09,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 563 transitions. [2023-11-23 22:42:09,946 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 563 transitions. Word has length 45 [2023-11-23 22:42:09,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:42:09,946 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 563 transitions. [2023-11-23 22:42:09,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 22:42:09,947 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 563 transitions. [2023-11-23 22:42:09,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-23 22:42:09,947 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:42:09,947 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:42:09,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 22:42:10,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-23 22:42:10,163 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting func_to_recursive_line_27_to_39_0Err23ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_27_to_39_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_27_to_39_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-23 22:42:10,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:42:10,163 INFO L85 PathProgramCache]: Analyzing trace with hash 762759194, now seen corresponding path program 1 times [2023-11-23 22:42:10,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:42:10,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146396207] [2023-11-23 22:42:10,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:10,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:42:10,179 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:42:10,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1396735154] [2023-11-23 22:42:10,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:10,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:42:10,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:42:10,184 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:42:10,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 22:42:10,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:42:10,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-23 22:42:10,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:42:10,334 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 [2023-11-23 22:42:10,524 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 [2023-11-23 22:42:10,555 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 22:42:10,555 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:42:10,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:42:10,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146396207] [2023-11-23 22:42:10,555 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:42:10,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396735154] [2023-11-23 22:42:10,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396735154] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:42:10,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:42:10,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:42:10,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851006469] [2023-11-23 22:42:10,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:42:10,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 22:42:10,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:42:10,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 22:42:10,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:42:10,558 INFO L87 Difference]: Start difference. First operand 452 states and 563 transitions. Second operand has 7 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 22:42:12,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 22:42:14,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 22:42:16,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 22:42:16,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:42:16,902 INFO L93 Difference]: Finished difference Result 584 states and 603 transitions. [2023-11-23 22:42:16,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:42:16,903 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2023-11-23 22:42:16,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:42:16,907 INFO L225 Difference]: With dead ends: 584 [2023-11-23 22:42:16,907 INFO L226 Difference]: Without dead ends: 583 [2023-11-23 22:42:16,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:42:16,908 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 518 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 17 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 1379 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-11-23 22:42:16,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [523 Valid, 1379 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 185 Invalid, 3 Unknown, 0 Unchecked, 6.3s Time] [2023-11-23 22:42:16,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2023-11-23 22:42:16,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 452. [2023-11-23 22:42:16,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 289 states have (on average 1.7854671280276817) internal successors, (516), 425 states have internal predecessors, (516), 22 states have call successors, (22), 4 states have call predecessors, (22), 5 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-23 22:42:16,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 562 transitions. [2023-11-23 22:42:16,934 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 562 transitions. Word has length 46 [2023-11-23 22:42:16,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:42:16,934 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 562 transitions. [2023-11-23 22:42:16,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 22:42:16,935 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 562 transitions. [2023-11-23 22:42:16,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-23 22:42:16,936 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:42:16,936 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:42:16,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-23 22:42:17,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-23 22:42:17,151 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting func_to_recursive_line_27_to_39_0Err24ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_27_to_39_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_27_to_39_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-23 22:42:17,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:42:17,152 INFO L85 PathProgramCache]: Analyzing trace with hash -2124268673, now seen corresponding path program 1 times [2023-11-23 22:42:17,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:42:17,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630731411] [2023-11-23 22:42:17,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:17,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:42:17,171 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:42:17,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1285190080] [2023-11-23 22:42:17,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:17,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:42:17,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:42:17,173 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:42:17,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-23 22:42:17,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:42:17,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 22:42:17,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:42:17,316 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 [2023-11-23 22:42:17,473 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 [2023-11-23 22:42:17,481 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 22:42:17,481 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:42:17,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:42:17,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630731411] [2023-11-23 22:42:17,482 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:42:17,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285190080] [2023-11-23 22:42:17,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285190080] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:42:17,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:42:17,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:42:17,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865838647] [2023-11-23 22:42:17,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:42:17,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 22:42:17,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:42:17,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 22:42:17,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:42:17,483 INFO L87 Difference]: Start difference. First operand 452 states and 562 transitions. Second operand has 7 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 22:42:19,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 22:42:21,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 22:42:23,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 22:42:25,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 22:42:25,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:42:25,806 INFO L93 Difference]: Finished difference Result 587 states and 606 transitions. [2023-11-23 22:42:25,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 22:42:25,807 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 47 [2023-11-23 22:42:25,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:42:25,811 INFO L225 Difference]: With dead ends: 587 [2023-11-23 22:42:25,811 INFO L226 Difference]: Without dead ends: 586 [2023-11-23 22:42:25,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:42:25,812 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 340 mSDsluCounter, 1411 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 17 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 1686 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2023-11-23 22:42:25,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 1686 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 208 Invalid, 4 Unknown, 0 Unchecked, 8.3s Time] [2023-11-23 22:42:25,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2023-11-23 22:42:25,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 452. [2023-11-23 22:42:25,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 289 states have (on average 1.782006920415225) internal successors, (515), 425 states have internal predecessors, (515), 22 states have call successors, (22), 4 states have call predecessors, (22), 5 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-23 22:42:25,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 561 transitions. [2023-11-23 22:42:25,837 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 561 transitions. Word has length 47 [2023-11-23 22:42:25,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:42:25,837 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 561 transitions. [2023-11-23 22:42:25,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 22:42:25,838 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 561 transitions. [2023-11-23 22:42:25,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-23 22:42:25,838 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:42:25,839 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:42:25,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-23 22:42:26,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-23 22:42:26,055 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting func_to_recursive_line_27_to_39_0Err25ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_27_to_39_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_27_to_39_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-23 22:42:26,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:42:26,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1427819332, now seen corresponding path program 1 times [2023-11-23 22:42:26,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:42:26,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556929261] [2023-11-23 22:42:26,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:26,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:42:26,072 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:42:26,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1591627727] [2023-11-23 22:42:26,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:26,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:42:26,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:42:26,074 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:42:26,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-23 22:42:26,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:42:26,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 22:42:26,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:42:26,250 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 [2023-11-23 22:42:26,413 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 [2023-11-23 22:42:26,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 22:42:26,425 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:42:26,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:42:26,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556929261] [2023-11-23 22:42:26,425 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:42:26,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591627727] [2023-11-23 22:42:26,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591627727] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:42:26,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:42:26,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:42:26,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614352554] [2023-11-23 22:42:26,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:42:26,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 22:42:26,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:42:26,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 22:42:26,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:42:26,427 INFO L87 Difference]: Start difference. First operand 452 states and 561 transitions. Second operand has 7 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 22:42:26,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:42:26,726 INFO L93 Difference]: Finished difference Result 586 states and 605 transitions. [2023-11-23 22:42:26,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 22:42:26,727 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2023-11-23 22:42:26,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:42:26,731 INFO L225 Difference]: With dead ends: 586 [2023-11-23 22:42:26,731 INFO L226 Difference]: Without dead ends: 585 [2023-11-23 22:42:26,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:42:26,732 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 514 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 1372 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 22:42:26,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 1372 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 22:42:26,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2023-11-23 22:42:26,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 452. [2023-11-23 22:42:26,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 289 states have (on average 1.778546712802768) internal successors, (514), 425 states have internal predecessors, (514), 22 states have call successors, (22), 4 states have call predecessors, (22), 5 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-23 22:42:26,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 560 transitions. [2023-11-23 22:42:26,755 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 560 transitions. Word has length 48 [2023-11-23 22:42:26,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:42:26,756 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 560 transitions. [2023-11-23 22:42:26,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 22:42:26,756 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 560 transitions. [2023-11-23 22:42:26,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-23 22:42:26,757 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:42:26,757 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:42:26,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-23 22:42:26,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-23 22:42:26,971 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting func_to_recursive_line_27_to_39_0Err26ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_27_to_39_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_27_to_39_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-23 22:42:26,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:42:26,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1312726239, now seen corresponding path program 1 times [2023-11-23 22:42:26,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:42:26,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031786319] [2023-11-23 22:42:26,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:26,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:42:26,999 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:42:27,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [144554031] [2023-11-23 22:42:27,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:27,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:42:27,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:42:27,012 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:42:27,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-23 22:42:27,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:42:27,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-23 22:42:27,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:42:27,164 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 [2023-11-23 22:42:27,170 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 [2023-11-23 22:42:27,176 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 [2023-11-23 22:42:27,844 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 22:42:27,844 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:42:27,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:42:27,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031786319] [2023-11-23 22:42:27,844 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:42:27,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144554031] [2023-11-23 22:42:27,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144554031] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:42:27,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:42:27,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 22:42:27,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549779397] [2023-11-23 22:42:27,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:42:27,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 22:42:27,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:42:27,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 22:42:27,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:42:27,847 INFO L87 Difference]: Start difference. First operand 452 states and 560 transitions. Second operand has 9 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 22:42:28,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:42:28,535 INFO L93 Difference]: Finished difference Result 581 states and 600 transitions. [2023-11-23 22:42:28,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 22:42:28,536 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2023-11-23 22:42:28,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:42:28,540 INFO L225 Difference]: With dead ends: 581 [2023-11-23 22:42:28,540 INFO L226 Difference]: Without dead ends: 579 [2023-11-23 22:42:28,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-11-23 22:42:28,541 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 604 mSDsluCounter, 1376 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 1632 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 22:42:28,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 1632 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 22:42:28,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2023-11-23 22:42:28,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 452. [2023-11-23 22:42:28,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 289 states have (on average 1.7716262975778547) internal successors, (512), 425 states have internal predecessors, (512), 22 states have call successors, (22), 4 states have call predecessors, (22), 5 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-23 22:42:28,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 558 transitions. [2023-11-23 22:42:28,565 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 558 transitions. Word has length 49 [2023-11-23 22:42:28,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:42:28,566 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 558 transitions. [2023-11-23 22:42:28,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 22:42:28,566 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 558 transitions. [2023-11-23 22:42:28,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-23 22:42:28,567 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:42:28,567 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:42:28,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-23 22:42:28,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-23 22:42:28,783 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting func_to_recursive_line_27_to_39_0Err28ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_27_to_39_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_27_to_39_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-23 22:42:28,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:42:28,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1190472387, now seen corresponding path program 1 times [2023-11-23 22:42:28,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:42:28,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278975216] [2023-11-23 22:42:28,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:28,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:42:28,805 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:42:28,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2090920894] [2023-11-23 22:42:28,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:28,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:42:28,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:42:28,807 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:42:28,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-23 22:42:28,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:42:28,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-23 22:42:28,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:42:28,975 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 [2023-11-23 22:42:29,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 22:42:29,167 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:42:29,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:42:29,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278975216] [2023-11-23 22:42:29,167 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:42:29,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090920894] [2023-11-23 22:42:29,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090920894] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:42:29,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:42:29,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:42:29,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651121835] [2023-11-23 22:42:29,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:42:29,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 22:42:29,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:42:29,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 22:42:29,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:42:29,169 INFO L87 Difference]: Start difference. First operand 452 states and 558 transitions. Second operand has 7 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 22:42:29,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:42:29,490 INFO L93 Difference]: Finished difference Result 587 states and 606 transitions. [2023-11-23 22:42:29,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 22:42:29,490 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2023-11-23 22:42:29,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:42:29,494 INFO L225 Difference]: With dead ends: 587 [2023-11-23 22:42:29,494 INFO L226 Difference]: Without dead ends: 586 [2023-11-23 22:42:29,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:42:29,496 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 506 mSDsluCounter, 1089 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 1364 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 22:42:29,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [511 Valid, 1364 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 22:42:29,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2023-11-23 22:42:29,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 452. [2023-11-23 22:42:29,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 289 states have (on average 1.768166089965398) internal successors, (511), 425 states have internal predecessors, (511), 22 states have call successors, (22), 4 states have call predecessors, (22), 5 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-23 22:42:29,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 557 transitions. [2023-11-23 22:42:29,527 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 557 transitions. Word has length 51 [2023-11-23 22:42:29,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:42:29,528 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 557 transitions. [2023-11-23 22:42:29,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 22:42:29,529 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 557 transitions. [2023-11-23 22:42:29,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-23 22:42:29,529 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:42:29,529 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:42:29,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-23 22:42:29,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-23 22:42:29,743 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting func_to_recursive_line_27_to_39_0Err29ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_27_to_39_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_27_to_39_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-23 22:42:29,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:42:29,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1750061568, now seen corresponding path program 1 times [2023-11-23 22:42:29,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:42:29,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199351663] [2023-11-23 22:42:29,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:29,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:42:29,760 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:42:29,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1424198977] [2023-11-23 22:42:29,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:29,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:42:29,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:42:29,762 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:42:29,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-23 22:42:29,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:42:29,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-23 22:42:29,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:42:29,909 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 [2023-11-23 22:42:30,096 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 22:42:30,097 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:42:30,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:42:30,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199351663] [2023-11-23 22:42:30,097 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:42:30,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424198977] [2023-11-23 22:42:30,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424198977] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:42:30,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:42:30,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:42:30,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386027066] [2023-11-23 22:42:30,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:42:30,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 22:42:30,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:42:30,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 22:42:30,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:42:30,100 INFO L87 Difference]: Start difference. First operand 452 states and 557 transitions. Second operand has 7 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 22:42:30,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:42:30,396 INFO L93 Difference]: Finished difference Result 586 states and 605 transitions. [2023-11-23 22:42:30,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 22:42:30,397 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2023-11-23 22:42:30,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:42:30,401 INFO L225 Difference]: With dead ends: 586 [2023-11-23 22:42:30,401 INFO L226 Difference]: Without dead ends: 585 [2023-11-23 22:42:30,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:42:30,402 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 559 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 1252 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:42:30,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 1252 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 22:42:30,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2023-11-23 22:42:30,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 452. [2023-11-23 22:42:30,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 289 states have (on average 1.7647058823529411) internal successors, (510), 425 states have internal predecessors, (510), 22 states have call successors, (22), 4 states have call predecessors, (22), 5 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-23 22:42:30,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 556 transitions. [2023-11-23 22:42:30,426 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 556 transitions. Word has length 52 [2023-11-23 22:42:30,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:42:30,426 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 556 transitions. [2023-11-23 22:42:30,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 22:42:30,426 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 556 transitions. [2023-11-23 22:42:30,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-23 22:42:30,427 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:42:30,427 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:42:30,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-23 22:42:30,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-23 22:42:30,643 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting func_to_recursive_line_27_to_39_0Err30ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_27_to_39_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_27_to_39_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-23 22:42:30,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:42:30,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1582666341, now seen corresponding path program 1 times [2023-11-23 22:42:30,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:42:30,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750534467] [2023-11-23 22:42:30,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:30,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:42:30,662 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:42:30,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [739830372] [2023-11-23 22:42:30,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:30,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:42:30,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:42:30,663 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:42:30,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-23 22:42:30,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:42:30,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 22:42:30,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:42:30,806 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 [2023-11-23 22:42:31,004 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 22:42:31,004 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:42:31,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:42:31,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750534467] [2023-11-23 22:42:31,004 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:42:31,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739830372] [2023-11-23 22:42:31,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739830372] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:42:31,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:42:31,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 22:42:31,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527060161] [2023-11-23 22:42:31,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:42:31,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 22:42:31,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:42:31,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 22:42:31,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:42:31,006 INFO L87 Difference]: Start difference. First operand 452 states and 556 transitions. Second operand has 8 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 22:42:31,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:42:31,391 INFO L93 Difference]: Finished difference Result 585 states and 604 transitions. [2023-11-23 22:42:31,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 22:42:31,392 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2023-11-23 22:42:31,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:42:31,395 INFO L225 Difference]: With dead ends: 585 [2023-11-23 22:42:31,395 INFO L226 Difference]: Without dead ends: 583 [2023-11-23 22:42:31,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-11-23 22:42:31,397 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 326 mSDsluCounter, 1444 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 1722 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 22:42:31,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 1722 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 22:42:31,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2023-11-23 22:42:31,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 452. [2023-11-23 22:42:31,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 289 states have (on average 1.7577854671280277) internal successors, (508), 425 states have internal predecessors, (508), 22 states have call successors, (22), 4 states have call predecessors, (22), 5 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-23 22:42:31,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 554 transitions. [2023-11-23 22:42:31,417 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 554 transitions. Word has length 53 [2023-11-23 22:42:31,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:42:31,417 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 554 transitions. [2023-11-23 22:42:31,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 22:42:31,417 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 554 transitions. [2023-11-23 22:42:31,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-23 22:42:31,418 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:42:31,418 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:42:31,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-23 22:42:31,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:42:31,631 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting func_to_recursive_line_27_to_39_0Err31ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_27_to_39_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_27_to_39_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-23 22:42:31,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:42:31,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1818016418, now seen corresponding path program 1 times [2023-11-23 22:42:31,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:42:31,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582346499] [2023-11-23 22:42:31,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:31,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:42:31,648 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:42:31,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1896709925] [2023-11-23 22:42:31,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:31,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:42:31,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:42:31,650 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:42:31,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-23 22:42:31,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:42:31,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-23 22:42:31,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:42:31,818 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 [2023-11-23 22:42:31,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 22:42:32,178 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 [2023-11-23 22:42:32,279 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 22:42:32,279 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:42:32,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:42:32,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582346499] [2023-11-23 22:42:32,280 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:42:32,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896709925] [2023-11-23 22:42:32,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896709925] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:42:32,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:42:32,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 22:42:32,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551724822] [2023-11-23 22:42:32,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:42:32,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 22:42:32,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:42:32,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 22:42:32,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:42:32,282 INFO L87 Difference]: Start difference. First operand 452 states and 554 transitions. Second operand has 8 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 22:42:34,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 22:42:34,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:42:34,820 INFO L93 Difference]: Finished difference Result 579 states and 598 transitions. [2023-11-23 22:42:34,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 22:42:34,820 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 54 [2023-11-23 22:42:34,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:42:34,823 INFO L225 Difference]: With dead ends: 579 [2023-11-23 22:42:34,823 INFO L226 Difference]: Without dead ends: 577 [2023-11-23 22:42:34,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-11-23 22:42:34,824 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 313 mSDsluCounter, 1575 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 1843 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-23 22:42:34,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 1843 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 372 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2023-11-23 22:42:34,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2023-11-23 22:42:34,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 452. [2023-11-23 22:42:34,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 289 states have (on average 1.7508650519031141) internal successors, (506), 425 states have internal predecessors, (506), 22 states have call successors, (22), 4 states have call predecessors, (22), 5 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-23 22:42:34,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 552 transitions. [2023-11-23 22:42:34,844 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 552 transitions. Word has length 54 [2023-11-23 22:42:34,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:42:34,845 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 552 transitions. [2023-11-23 22:42:34,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 22:42:34,845 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 552 transitions. [2023-11-23 22:42:34,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-23 22:42:34,846 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:42:34,846 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:42:34,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-23 22:42:35,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:42:35,059 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting func_to_recursive_line_27_to_39_0Err34ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_27_to_39_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_27_to_39_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-23 22:42:35,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:42:35,060 INFO L85 PathProgramCache]: Analyzing trace with hash 653631038, now seen corresponding path program 1 times [2023-11-23 22:42:35,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:42:35,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817117872] [2023-11-23 22:42:35,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:35,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:42:35,077 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:42:35,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [930067774] [2023-11-23 22:42:35,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:35,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:42:35,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:42:35,079 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:42:35,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-23 22:42:35,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:42:35,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 22:42:35,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:42:35,246 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 [2023-11-23 22:42:35,457 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-23 22:42:35,458 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:42:35,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:42:35,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817117872] [2023-11-23 22:42:35,458 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:42:35,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930067774] [2023-11-23 22:42:35,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930067774] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:42:35,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:42:35,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:42:35,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584688729] [2023-11-23 22:42:35,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:42:35,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 22:42:35,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:42:35,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 22:42:35,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:42:35,460 INFO L87 Difference]: Start difference. First operand 452 states and 552 transitions. Second operand has 7 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-23 22:42:35,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:42:35,786 INFO L93 Difference]: Finished difference Result 581 states and 600 transitions. [2023-11-23 22:42:35,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:42:35,787 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 63 [2023-11-23 22:42:35,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:42:35,789 INFO L225 Difference]: With dead ends: 581 [2023-11-23 22:42:35,790 INFO L226 Difference]: Without dead ends: 580 [2023-11-23 22:42:35,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:42:35,791 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 321 mSDsluCounter, 1393 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 1665 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 22:42:35,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 1665 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 22:42:35,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2023-11-23 22:42:35,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 452. [2023-11-23 22:42:35,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 289 states have (on average 1.7474048442906573) internal successors, (505), 425 states have internal predecessors, (505), 22 states have call successors, (22), 4 states have call predecessors, (22), 5 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-23 22:42:35,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 551 transitions. [2023-11-23 22:42:35,811 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 551 transitions. Word has length 63 [2023-11-23 22:42:35,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:42:35,812 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 551 transitions. [2023-11-23 22:42:35,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-23 22:42:35,812 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 551 transitions. [2023-11-23 22:42:35,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-23 22:42:35,813 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:42:35,813 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:42:35,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-23 22:42:36,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:42:36,027 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting func_to_recursive_line_27_to_39_0Err35ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_27_to_39_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_27_to_39_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-23 22:42:36,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:42:36,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1212274189, now seen corresponding path program 1 times [2023-11-23 22:42:36,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:42:36,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580346482] [2023-11-23 22:42:36,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:36,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:42:36,048 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:42:36,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1785003631] [2023-11-23 22:42:36,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:36,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:42:36,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:42:36,050 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:42:36,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-23 22:42:36,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:42:36,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-23 22:42:36,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:42:36,205 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 [2023-11-23 22:42:36,468 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-23 22:42:36,468 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:42:36,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:42:36,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580346482] [2023-11-23 22:42:36,468 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:42:36,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785003631] [2023-11-23 22:42:36,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785003631] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:42:36,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:42:36,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:42:36,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590624876] [2023-11-23 22:42:36,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:42:36,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 22:42:36,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:42:36,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 22:42:36,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:42:36,470 INFO L87 Difference]: Start difference. First operand 452 states and 551 transitions. Second operand has 7 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-23 22:42:36,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:42:36,767 INFO L93 Difference]: Finished difference Result 580 states and 599 transitions. [2023-11-23 22:42:36,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:42:36,768 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 64 [2023-11-23 22:42:36,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:42:36,771 INFO L225 Difference]: With dead ends: 580 [2023-11-23 22:42:36,772 INFO L226 Difference]: Without dead ends: 579 [2023-11-23 22:42:36,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:42:36,773 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 495 mSDsluCounter, 1190 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 1463 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 22:42:36,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [500 Valid, 1463 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 22:42:36,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2023-11-23 22:42:36,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 452. [2023-11-23 22:42:36,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 289 states have (on average 1.7439446366782008) internal successors, (504), 425 states have internal predecessors, (504), 22 states have call successors, (22), 4 states have call predecessors, (22), 5 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-23 22:42:36,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 550 transitions. [2023-11-23 22:42:36,793 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 550 transitions. Word has length 64 [2023-11-23 22:42:36,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:42:36,793 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 550 transitions. [2023-11-23 22:42:36,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-23 22:42:36,793 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 550 transitions. [2023-11-23 22:42:36,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-23 22:42:36,794 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:42:36,794 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2023-11-23 22:42:36,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-23 22:42:37,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:42:37,007 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting func_to_recursive_line_27_to_39_0Err36ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_27_to_39_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_27_to_39_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-23 22:42:37,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:42:37,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1074205920, now seen corresponding path program 1 times [2023-11-23 22:42:37,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:42:37,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627751468] [2023-11-23 22:42:37,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:37,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:42:37,027 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:42:37,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1703923871] [2023-11-23 22:42:37,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:37,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:42:37,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:42:37,028 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:42:37,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-23 22:42:37,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:42:37,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 22:42:37,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:42:37,287 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 17 treesize of output 9 [2023-11-23 22:42:37,296 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 22:42:37,296 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:42:37,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:42:37,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627751468] [2023-11-23 22:42:37,297 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:42:37,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703923871] [2023-11-23 22:42:37,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703923871] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:42:37,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:42:37,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:42:37,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664179996] [2023-11-23 22:42:37,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:42:37,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:42:37,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:42:37,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:42:37,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:42:37,302 INFO L87 Difference]: Start difference. First operand 452 states and 550 transitions. Second operand has 6 states, 5 states have (on average 10.0) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 22:42:39,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 22:42:39,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:42:39,563 INFO L93 Difference]: Finished difference Result 456 states and 553 transitions. [2023-11-23 22:42:39,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 22:42:39,563 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2023-11-23 22:42:39,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:42:39,566 INFO L225 Difference]: With dead ends: 456 [2023-11-23 22:42:39,566 INFO L226 Difference]: Without dead ends: 455 [2023-11-23 22:42:39,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:42:39,567 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 308 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:42:39,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 1056 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 172 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2023-11-23 22:42:39,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2023-11-23 22:42:39,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 455. [2023-11-23 22:42:39,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 292 states have (on average 1.7294520547945205) internal successors, (505), 427 states have internal predecessors, (505), 22 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-23 22:42:39,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 551 transitions. [2023-11-23 22:42:39,587 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 551 transitions. Word has length 65 [2023-11-23 22:42:39,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:42:39,588 INFO L495 AbstractCegarLoop]: Abstraction has 455 states and 551 transitions. [2023-11-23 22:42:39,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 22:42:39,588 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 551 transitions. [2023-11-23 22:42:39,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-23 22:42:39,589 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:42:39,589 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2023-11-23 22:42:39,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-23 22:42:39,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:42:39,803 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting func_to_recursive_line_27_to_39_0Err37ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_27_to_39_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_27_to_39_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-23 22:42:39,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:42:39,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1059354731, now seen corresponding path program 1 times [2023-11-23 22:42:39,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:42:39,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349615653] [2023-11-23 22:42:39,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:39,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:42:39,819 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:42:39,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1320107509] [2023-11-23 22:42:39,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:42:39,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:42:39,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:42:39,822 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:42:39,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abeb249e-14bf-4991-8545-24a48e8213a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-23 22:42:39,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:42:39,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 22:42:39,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:42:40,050 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 [2023-11-23 22:42:40,061 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 22:42:40,062 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:42:40,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:42:40,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349615653] [2023-11-23 22:42:40,062 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:42:40,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320107509] [2023-11-23 22:42:40,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320107509] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:42:40,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:42:40,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:42:40,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558060410] [2023-11-23 22:42:40,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:42:40,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:42:40,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:42:40,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:42:40,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:42:40,066 INFO L87 Difference]: Start difference. First operand 455 states and 551 transitions. Second operand has 6 states, 5 states have (on average 10.2) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4)