./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya --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 260777f6a7be1f16cc330a008300c11ebdea8f1cf9d8e96a0325274fd8fd5b2a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 01:31:49,331 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 01:31:49,393 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-29 01:31:49,397 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 01:31:49,398 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 01:31:49,420 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 01:31:49,420 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 01:31:49,421 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 01:31:49,422 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 01:31:49,422 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 01:31:49,423 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 01:31:49,423 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 01:31:49,424 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 01:31:49,425 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 01:31:49,425 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 01:31:49,426 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 01:31:49,426 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 01:31:49,427 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 01:31:49,427 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 01:31:49,428 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 01:31:49,428 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 01:31:49,429 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 01:31:49,430 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 01:31:49,430 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 01:31:49,430 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-29 01:31:49,431 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 01:31:49,431 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 01:31:49,432 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 01:31:49,432 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 01:31:49,433 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 01:31:49,433 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 01:31:49,433 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 01:31:49,434 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 01:31:49,434 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:31:49,434 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 01:31:49,435 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 01:31:49,435 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 01:31:49,435 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 01:31:49,435 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 01:31:49,435 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 01:31:49,435 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 01:31:49,436 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 01:31:49,436 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 01:31:49,436 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 01:31:49,436 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_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 260777f6a7be1f16cc330a008300c11ebdea8f1cf9d8e96a0325274fd8fd5b2a [2023-11-29 01:31:49,648 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 01:31:49,679 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 01:31:49,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 01:31:49,683 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 01:31:49,683 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 01:31:49,685 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c [2023-11-29 01:31:52,501 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 01:31:52,664 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 01:31:52,665 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c [2023-11-29 01:31:52,673 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/data/ffdb7ac65/ba2b2d0d6e224420b3e0bb22282e576f/FLAG32fcb4583 [2023-11-29 01:31:52,686 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/data/ffdb7ac65/ba2b2d0d6e224420b3e0bb22282e576f [2023-11-29 01:31:52,688 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 01:31:52,689 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 01:31:52,691 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 01:31:52,691 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 01:31:52,697 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 01:31:52,697 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:31:52" (1/1) ... [2023-11-29 01:31:52,698 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33809f25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:31:52, skipping insertion in model container [2023-11-29 01:31:52,698 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:31:52" (1/1) ... [2023-11-29 01:31:52,722 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 01:31:52,914 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:31:52,925 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 01:31:52,965 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:31:52,981 INFO L206 MainTranslator]: Completed translation [2023-11-29 01:31:52,982 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:31:52 WrapperNode [2023-11-29 01:31:52,982 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 01:31:52,983 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 01:31:52,983 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 01:31:52,983 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 01:31:52,992 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:31:52" (1/1) ... [2023-11-29 01:31:53,004 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:31:52" (1/1) ... [2023-11-29 01:31:53,037 INFO L138 Inliner]: procedures = 16, calls = 100, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 196 [2023-11-29 01:31:53,038 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 01:31:53,038 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 01:31:53,039 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 01:31:53,039 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 01:31:53,051 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:31:52" (1/1) ... [2023-11-29 01:31:53,052 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:31:52" (1/1) ... [2023-11-29 01:31:53,056 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:31:52" (1/1) ... [2023-11-29 01:31:53,076 INFO L175 MemorySlicer]: Split 66 memory accesses to 6 slices as follows [2, 12, 5, 21, 15, 11]. 32 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 9 writes are split as follows [0, 2, 1, 2, 2, 2]. [2023-11-29 01:31:53,077 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:31:52" (1/1) ... [2023-11-29 01:31:53,077 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:31:52" (1/1) ... [2023-11-29 01:31:53,086 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:31:52" (1/1) ... [2023-11-29 01:31:53,088 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:31:52" (1/1) ... [2023-11-29 01:31:53,091 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:31:52" (1/1) ... [2023-11-29 01:31:53,093 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:31:52" (1/1) ... [2023-11-29 01:31:53,098 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 01:31:53,099 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 01:31:53,099 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 01:31:53,099 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 01:31:53,100 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:31:52" (1/1) ... [2023-11-29 01:31:53,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:31:53,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:31:53,132 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 01:31:53,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 01:31:53,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 01:31:53,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 01:31:53,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 01:31:53,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 01:31:53,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 01:31:53,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 01:31:53,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-29 01:31:53,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 01:31:53,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 01:31:53,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 01:31:53,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 01:31:53,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 01:31:53,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 01:31:53,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-29 01:31:53,175 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_29_to_41_0 [2023-11-29 01:31:53,175 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_29_to_41_0 [2023-11-29 01:31:53,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 01:31:53,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 01:31:53,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 01:31:53,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 01:31:53,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 01:31:53,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 01:31:53,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 01:31:53,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-29 01:31:53,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-29 01:31:53,176 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-29 01:31:53,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 01:31:53,269 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 01:31:53,271 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 01:31:53,934 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 01:31:53,971 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 01:31:53,971 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 01:31:53,971 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:31:53 BoogieIcfgContainer [2023-11-29 01:31:53,972 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 01:31:53,974 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 01:31:53,974 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 01:31:53,978 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 01:31:53,978 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 01:31:52" (1/3) ... [2023-11-29 01:31:53,979 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@857eb39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:31:53, skipping insertion in model container [2023-11-29 01:31:53,979 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:31:52" (2/3) ... [2023-11-29 01:31:53,979 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@857eb39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:31:53, skipping insertion in model container [2023-11-29 01:31:53,979 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:31:53" (3/3) ... [2023-11-29 01:31:53,980 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_cohencu-ll.c [2023-11-29 01:31:54,000 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 01:31:54,000 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 138 error locations. [2023-11-29 01:31:54,059 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:31:54,066 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;@3f4ce428, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:31:54,067 INFO L358 AbstractCegarLoop]: Starting to check reachability of 138 error locations. [2023-11-29 01:31:54,072 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) [2023-11-29 01:31:54,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-29 01:31:54,080 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:31:54,081 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 01:31:54,081 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:31:54,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:31:54,087 INFO L85 PathProgramCache]: Analyzing trace with hash 370391600, now seen corresponding path program 1 times [2023-11-29 01:31:54,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:31:54,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029961364] [2023-11-29 01:31:54,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:31:54,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:31:54,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:31:54,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:31:54,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:31:54,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029961364] [2023-11-29 01:31:54,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029961364] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:31:54,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:31:54,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:31:54,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980755436] [2023-11-29 01:31:54,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:31:54,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:31:54,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:31:54,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:31:54,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:31:54,589 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) [2023-11-29 01:31:54,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:31:54,905 INFO L93 Difference]: Finished difference Result 910 states and 976 transitions. [2023-11-29 01:31:54,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:31:54,907 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 [2023-11-29 01:31:54,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:31:54,922 INFO L225 Difference]: With dead ends: 910 [2023-11-29 01:31:54,922 INFO L226 Difference]: Without dead ends: 595 [2023-11-29 01:31:54,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:31:54,932 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 379 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2023-11-29 01:31:54,933 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] [2023-11-29 01:31:54,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2023-11-29 01:31:55,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 370. [2023-11-29 01:31:55,003 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) [2023-11-29 01:31:55,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 428 transitions. [2023-11-29 01:31:55,008 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 428 transitions. Word has length 5 [2023-11-29 01:31:55,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:31:55,008 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 428 transitions. [2023-11-29 01:31:55,008 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) [2023-11-29 01:31:55,009 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 428 transitions. [2023-11-29 01:31:55,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-29 01:31:55,010 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:31:55,010 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:31:55,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 01:31:55,011 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting func_to_recursive_line_29_to_41_0Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:31:55,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:31:55,012 INFO L85 PathProgramCache]: Analyzing trace with hash 2009196607, now seen corresponding path program 1 times [2023-11-29 01:31:55,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:31:55,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029449219] [2023-11-29 01:31:55,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:31:55,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:31:55,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:31:55,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-29 01:31:55,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:31:55,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:31:55,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:31:55,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029449219] [2023-11-29 01:31:55,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029449219] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:31:55,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:31:55,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:31:55,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682761081] [2023-11-29 01:31:55,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:31:55,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:31:55,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:31:55,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:31:55,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:31:55,231 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) [2023-11-29 01:31:55,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:31:55,542 INFO L93 Difference]: Finished difference Result 595 states and 615 transitions. [2023-11-29 01:31:55,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:31:55,543 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 [2023-11-29 01:31:55,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:31:55,547 INFO L225 Difference]: With dead ends: 595 [2023-11-29 01:31:55,548 INFO L226 Difference]: Without dead ends: 591 [2023-11-29 01:31:55,548 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 [2023-11-29 01:31:55,550 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 [2023-11-29 01:31:55,551 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] [2023-11-29 01:31:55,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2023-11-29 01:31:55,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 370. [2023-11-29 01:31:55,574 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) [2023-11-29 01:31:55,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 424 transitions. [2023-11-29 01:31:55,577 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 424 transitions. Word has length 15 [2023-11-29 01:31:55,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:31:55,577 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 424 transitions. [2023-11-29 01:31:55,578 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) [2023-11-29 01:31:55,578 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 424 transitions. [2023-11-29 01:31:55,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-29 01:31:55,579 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:31:55,579 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:31:55,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 01:31:55,579 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting func_to_recursive_line_29_to_41_0Err8ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:31:55,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:31:55,580 INFO L85 PathProgramCache]: Analyzing trace with hash 2015087747, now seen corresponding path program 1 times [2023-11-29 01:31:55,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:31:55,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614615523] [2023-11-29 01:31:55,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:31:55,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:31:55,604 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:31:55,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1559217390] [2023-11-29 01:31:55,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:31:55,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:31:55,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:31:55,611 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:31:55,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 01:31:55,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:31:55,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:31:55,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:31:55,848 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 [2023-11-29 01:31:55,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:31:55,859 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:31:55,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:31:55,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614615523] [2023-11-29 01:31:55,860 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:31:55,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559217390] [2023-11-29 01:31:55,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559217390] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:31:55,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:31:55,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:31:55,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464593550] [2023-11-29 01:31:55,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:31:55,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:31:55,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:31:55,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:31:55,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:31:55,863 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) [2023-11-29 01:32:00,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:32:00,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:00,111 INFO L93 Difference]: Finished difference Result 372 states and 426 transitions. [2023-11-29 01:32:00,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:32:00,112 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 [2023-11-29 01:32:00,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:00,116 INFO L225 Difference]: With dead ends: 372 [2023-11-29 01:32:00,116 INFO L226 Difference]: Without dead ends: 371 [2023-11-29 01:32:00,117 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 [2023-11-29 01:32:00,119 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 399 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s 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, 4.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:00,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 1020 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 126 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2023-11-29 01:32:00,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2023-11-29 01:32:00,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2023-11-29 01:32:00,136 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) [2023-11-29 01:32:00,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 424 transitions. [2023-11-29 01:32:00,139 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 424 transitions. Word has length 19 [2023-11-29 01:32:00,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:00,139 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 424 transitions. [2023-11-29 01:32:00,139 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) [2023-11-29 01:32:00,139 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 424 transitions. [2023-11-29 01:32:00,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-29 01:32:00,140 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:00,140 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] [2023-11-29 01:32:00,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 01:32:00,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:00,341 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting func_to_recursive_line_29_to_41_0Err9ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:32:00,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:00,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1956789228, now seen corresponding path program 1 times [2023-11-29 01:32:00,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:00,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459544030] [2023-11-29 01:32:00,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:00,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:00,363 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:00,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1086482909] [2023-11-29 01:32:00,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:00,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:00,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:00,366 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:00,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 01:32:00,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:00,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:32:00,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:00,571 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 [2023-11-29 01:32:00,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:32:00,584 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:32:00,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:00,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459544030] [2023-11-29 01:32:00,585 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:00,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086482909] [2023-11-29 01:32:00,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086482909] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:32:00,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:32:00,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:32:00,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165538269] [2023-11-29 01:32:00,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:32:00,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:32:00,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:00,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:32:00,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:32:00,589 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) [2023-11-29 01:32:04,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:32:04,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:04,857 INFO L93 Difference]: Finished difference Result 371 states and 424 transitions. [2023-11-29 01:32:04,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:32:04,858 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 [2023-11-29 01:32:04,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:04,861 INFO L225 Difference]: With dead ends: 371 [2023-11-29 01:32:04,861 INFO L226 Difference]: Without dead ends: 370 [2023-11-29 01:32:04,862 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 [2023-11-29 01:32:04,863 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 389 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s 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, 4.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:04,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 1020 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 131 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2023-11-29 01:32:04,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2023-11-29 01:32:04,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 370. [2023-11-29 01:32:04,881 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) [2023-11-29 01:32:04,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 422 transitions. [2023-11-29 01:32:04,883 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 422 transitions. Word has length 20 [2023-11-29 01:32:04,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:04,884 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 422 transitions. [2023-11-29 01:32:04,884 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) [2023-11-29 01:32:04,884 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 422 transitions. [2023-11-29 01:32:04,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-29 01:32:04,885 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:04,885 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] [2023-11-29 01:32:04,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 01:32:05,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:05,086 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting func_to_recursive_line_29_to_41_0Err10ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:32:05,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:05,086 INFO L85 PathProgramCache]: Analyzing trace with hash -530923867, now seen corresponding path program 1 times [2023-11-29 01:32:05,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:05,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649216804] [2023-11-29 01:32:05,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:05,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:05,105 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:05,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [381600178] [2023-11-29 01:32:05,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:05,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:05,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:05,107 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:05,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 01:32:05,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:05,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 01:32:05,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:05,227 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 [2023-11-29 01:32:05,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:32:05,424 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:32:05,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:05,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649216804] [2023-11-29 01:32:05,425 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:05,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381600178] [2023-11-29 01:32:05,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381600178] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:32:05,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:32:05,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 01:32:05,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162001625] [2023-11-29 01:32:05,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:32:05,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 01:32:05,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:05,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 01:32:05,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:32:05,428 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) [2023-11-29 01:32:05,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:05,774 INFO L93 Difference]: Finished difference Result 593 states and 612 transitions. [2023-11-29 01:32:05,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:32:05,776 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 [2023-11-29 01:32:05,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:05,781 INFO L225 Difference]: With dead ends: 593 [2023-11-29 01:32:05,781 INFO L226 Difference]: Without dead ends: 591 [2023-11-29 01:32:05,782 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 [2023-11-29 01:32:05,783 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, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:05,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 1795 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:32:05,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2023-11-29 01:32:05,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 452. [2023-11-29 01:32:05,806 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) [2023-11-29 01:32:05,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 574 transitions. [2023-11-29 01:32:05,810 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 574 transitions. Word has length 21 [2023-11-29 01:32:05,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:05,810 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 574 transitions. [2023-11-29 01:32:05,810 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) [2023-11-29 01:32:05,811 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 574 transitions. [2023-11-29 01:32:05,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-29 01:32:05,811 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:05,811 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] [2023-11-29 01:32:05,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 01:32:06,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:06,012 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting func_to_recursive_line_29_to_41_0Err11ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:32:06,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:06,013 INFO L85 PathProgramCache]: Analyzing trace with hash 721229366, now seen corresponding path program 1 times [2023-11-29 01:32:06,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:06,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569294635] [2023-11-29 01:32:06,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:06,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:06,030 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:06,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1142039400] [2023-11-29 01:32:06,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:06,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:06,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:06,031 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:06,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 01:32:06,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:06,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 01:32:06,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:06,147 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 [2023-11-29 01:32:06,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:32:06,306 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:32:06,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:06,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569294635] [2023-11-29 01:32:06,306 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:06,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142039400] [2023-11-29 01:32:06,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142039400] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:32:06,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:32:06,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:32:06,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279635533] [2023-11-29 01:32:06,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:32:06,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:32:06,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:06,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:32:06,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:32:06,308 INFO L87 Difference]: Start difference. First operand 452 states and 574 transitions. Second operand has 7 states, 5 states have (on average 3.8) internal successors, (19), 5 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) [2023-11-29 01:32:06,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:06,571 INFO L93 Difference]: Finished difference Result 591 states and 610 transitions. [2023-11-29 01:32:06,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:32:06,572 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.8) internal successors, (19), 5 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 [2023-11-29 01:32:06,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:06,575 INFO L225 Difference]: With dead ends: 591 [2023-11-29 01:32:06,575 INFO L226 Difference]: Without dead ends: 589 [2023-11-29 01:32:06,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:32:06,577 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 433 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 1504 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:06,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 1504 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:32:06,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2023-11-29 01:32:06,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 452. [2023-11-29 01:32:06,594 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) [2023-11-29 01:32:06,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 572 transitions. [2023-11-29 01:32:06,596 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 572 transitions. Word has length 22 [2023-11-29 01:32:06,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:06,596 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 572 transitions. [2023-11-29 01:32:06,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.8) internal successors, (19), 5 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) [2023-11-29 01:32:06,597 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 572 transitions. [2023-11-29 01:32:06,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-29 01:32:06,597 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:06,598 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] [2023-11-29 01:32:06,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-29 01:32:06,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 01:32:06,800 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting func_to_recursive_line_29_to_41_0Err14ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:32:06,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:06,801 INFO L85 PathProgramCache]: Analyzing trace with hash 133250338, now seen corresponding path program 1 times [2023-11-29 01:32:06,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:06,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292239206] [2023-11-29 01:32:06,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:06,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:06,818 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:06,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1735570529] [2023-11-29 01:32:06,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:06,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:06,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:06,820 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:06,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 01:32:06,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:06,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 01:32:06,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:06,978 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 [2023-11-29 01:32:06,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 01:32:06,985 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:32:06,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:06,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292239206] [2023-11-29 01:32:06,985 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:06,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735570529] [2023-11-29 01:32:06,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735570529] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:32:06,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:32:06,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:32:06,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546333926] [2023-11-29 01:32:06,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:32:06,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:32:06,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:06,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:32:06,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:32:06,988 INFO L87 Difference]: Start difference. First operand 452 states and 572 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:32:07,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:07,095 INFO L93 Difference]: Finished difference Result 452 states and 572 transitions. [2023-11-29 01:32:07,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:32:07,095 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (3), 1 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 [2023-11-29 01:32:07,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:07,098 INFO L225 Difference]: With dead ends: 452 [2023-11-29 01:32:07,099 INFO L226 Difference]: Without dead ends: 450 [2023-11-29 01:32:07,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:32:07,100 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 22 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1140 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:07,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 1140 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:32:07,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2023-11-29 01:32:07,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 450. [2023-11-29 01:32:07,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 289 states have (on average 1.8096885813148789) internal successors, (523), 423 states have internal predecessors, (523), 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) [2023-11-29 01:32:07,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 569 transitions. [2023-11-29 01:32:07,116 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 569 transitions. Word has length 31 [2023-11-29 01:32:07,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:07,117 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 569 transitions. [2023-11-29 01:32:07,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:32:07,117 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 569 transitions. [2023-11-29 01:32:07,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-29 01:32:07,118 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:07,118 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:32:07,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 01:32:07,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:07,319 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting func_to_recursive_line_29_to_41_0Err15ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:32:07,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:07,320 INFO L85 PathProgramCache]: Analyzing trace with hash -164206749, now seen corresponding path program 1 times [2023-11-29 01:32:07,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:07,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58987493] [2023-11-29 01:32:07,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:07,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:07,337 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:07,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1296725537] [2023-11-29 01:32:07,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:07,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:07,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:07,338 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:07,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 01:32:07,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:07,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 01:32:07,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:07,599 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 28 treesize of output 12 [2023-11-29 01:32:07,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:32:07,620 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:32:07,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:07,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58987493] [2023-11-29 01:32:07,621 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:07,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296725537] [2023-11-29 01:32:07,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296725537] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:32:07,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:32:07,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 01:32:07,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23910671] [2023-11-29 01:32:07,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:32:07,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:32:07,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:07,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:32:07,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:32:07,622 INFO L87 Difference]: Start difference. First operand 450 states and 569 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:32:11,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 01:32:11,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:11,952 INFO L93 Difference]: Finished difference Result 454 states and 572 transitions. [2023-11-29 01:32:11,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 01:32:11,953 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2023-11-29 01:32:11,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:11,957 INFO L225 Difference]: With dead ends: 454 [2023-11-29 01:32:11,957 INFO L226 Difference]: Without dead ends: 453 [2023-11-29 01:32:11,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:32:11,958 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 374 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 1286 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:11,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 1286 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 171 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2023-11-29 01:32:11,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2023-11-29 01:32:11,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 453. [2023-11-29 01:32:11,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 292 states have (on average 1.7945205479452055) internal successors, (524), 425 states have internal predecessors, (524), 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) [2023-11-29 01:32:11,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 570 transitions. [2023-11-29 01:32:11,975 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 570 transitions. Word has length 32 [2023-11-29 01:32:11,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:11,975 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 570 transitions. [2023-11-29 01:32:11,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:32:11,975 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 570 transitions. [2023-11-29 01:32:11,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-29 01:32:11,976 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:11,977 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:32:11,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 01:32:12,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:12,180 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting func_to_recursive_line_29_to_41_0Err16ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:32:12,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:12,181 INFO L85 PathProgramCache]: Analyzing trace with hash -795441852, now seen corresponding path program 1 times [2023-11-29 01:32:12,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:12,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267889867] [2023-11-29 01:32:12,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:12,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:12,198 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:12,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1552077655] [2023-11-29 01:32:12,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:12,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:12,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:12,200 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:12,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 01:32:12,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:12,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 01:32:12,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:12,345 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 [2023-11-29 01:32:12,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 01:32:12,560 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:32:12,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:12,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267889867] [2023-11-29 01:32:12,560 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:12,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552077655] [2023-11-29 01:32:12,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552077655] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:32:12,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:32:12,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:32:12,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514507048] [2023-11-29 01:32:12,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:32:12,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:32:12,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:12,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:32:12,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:32:12,562 INFO L87 Difference]: Start difference. First operand 453 states and 570 transitions. Second operand has 7 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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) [2023-11-29 01:32:12,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:12,890 INFO L93 Difference]: Finished difference Result 588 states and 606 transitions. [2023-11-29 01:32:12,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:32:12,890 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 33 [2023-11-29 01:32:12,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:12,894 INFO L225 Difference]: With dead ends: 588 [2023-11-29 01:32:12,894 INFO L226 Difference]: Without dead ends: 586 [2023-11-29 01:32:12,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:32:12,895 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 330 mSDsluCounter, 1441 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 1730 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:12,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 1730 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:32:12,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2023-11-29 01:32:12,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 453. [2023-11-29 01:32:12,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 292 states have (on average 1.7876712328767124) internal successors, (522), 425 states have internal predecessors, (522), 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) [2023-11-29 01:32:12,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 568 transitions. [2023-11-29 01:32:12,915 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 568 transitions. Word has length 33 [2023-11-29 01:32:12,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:12,916 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 568 transitions. [2023-11-29 01:32:12,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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) [2023-11-29 01:32:12,916 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 568 transitions. [2023-11-29 01:32:12,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-29 01:32:12,917 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:12,917 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] [2023-11-29 01:32:12,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 01:32:13,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:13,118 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting func_to_recursive_line_29_to_41_0Err18ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:32:13,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:13,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1037075609, now seen corresponding path program 1 times [2023-11-29 01:32:13,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:13,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116702861] [2023-11-29 01:32:13,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:13,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:13,133 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:13,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2031845356] [2023-11-29 01:32:13,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:13,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:13,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:13,135 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:13,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 01:32:13,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:13,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 01:32:13,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:13,269 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 [2023-11-29 01:32:13,273 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 [2023-11-29 01:32:13,722 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 [2023-11-29 01:32:13,735 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 01:32:13,735 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:32:13,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:13,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116702861] [2023-11-29 01:32:13,735 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:13,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031845356] [2023-11-29 01:32:13,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031845356] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:32:13,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:32:13,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:32:13,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047103690] [2023-11-29 01:32:13,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:32:13,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:32:13,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:13,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:32:13,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:32:13,738 INFO L87 Difference]: Start difference. First operand 453 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) [2023-11-29 01:32:14,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:14,215 INFO L93 Difference]: Finished difference Result 594 states and 612 transitions. [2023-11-29 01:32:14,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:32:14,216 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 [2023-11-29 01:32:14,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:14,219 INFO L225 Difference]: With dead ends: 594 [2023-11-29 01:32:14,219 INFO L226 Difference]: Without dead ends: 593 [2023-11-29 01:32:14,220 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 [2023-11-29 01:32:14,220 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 370 mSDsluCounter, 1218 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 1475 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:14,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 1475 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:32:14,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2023-11-29 01:32:14,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 453. [2023-11-29 01:32:14,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 292 states have (on average 1.7842465753424657) internal successors, (521), 425 states have internal predecessors, (521), 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) [2023-11-29 01:32:14,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 567 transitions. [2023-11-29 01:32:14,240 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 567 transitions. Word has length 41 [2023-11-29 01:32:14,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:14,240 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 567 transitions. [2023-11-29 01:32:14,240 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) [2023-11-29 01:32:14,240 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 567 transitions. [2023-11-29 01:32:14,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-29 01:32:14,241 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:14,242 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] [2023-11-29 01:32:14,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-29 01:32:14,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 01:32:14,444 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting func_to_recursive_line_29_to_41_0Err19ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:32:14,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:14,445 INFO L85 PathProgramCache]: Analyzing trace with hash 2084572886, now seen corresponding path program 1 times [2023-11-29 01:32:14,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:14,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484144669] [2023-11-29 01:32:14,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:14,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:14,462 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:14,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1705528381] [2023-11-29 01:32:14,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:14,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:14,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:14,464 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:14,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 01:32:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:14,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 01:32:14,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:14,624 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 [2023-11-29 01:32:14,633 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 [2023-11-29 01:32:15,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 01:32:15,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 01:32:15,089 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:32:15,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:15,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484144669] [2023-11-29 01:32:15,089 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:15,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705528381] [2023-11-29 01:32:15,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705528381] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:32:15,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:32:15,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:32:15,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236966051] [2023-11-29 01:32:15,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:32:15,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:32:15,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:15,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:32:15,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:32:15,092 INFO L87 Difference]: Start difference. First operand 453 states and 567 transitions. Second operand has 7 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2023-11-29 01:32:15,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:15,460 INFO L93 Difference]: Finished difference Result 593 states and 611 transitions. [2023-11-29 01:32:15,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:32:15,461 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 42 [2023-11-29 01:32:15,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:15,464 INFO L225 Difference]: With dead ends: 593 [2023-11-29 01:32:15,465 INFO L226 Difference]: Without dead ends: 592 [2023-11-29 01:32:15,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:32:15,466 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 617 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:15,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [622 Valid, 1188 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:32:15,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2023-11-29 01:32:15,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 453. [2023-11-29 01:32:15,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 292 states have (on average 1.7808219178082192) internal successors, (520), 425 states have internal predecessors, (520), 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) [2023-11-29 01:32:15,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 566 transitions. [2023-11-29 01:32:15,483 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 566 transitions. Word has length 42 [2023-11-29 01:32:15,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:15,483 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 566 transitions. [2023-11-29 01:32:15,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2023-11-29 01:32:15,484 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 566 transitions. [2023-11-29 01:32:15,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 01:32:15,485 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:15,485 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] [2023-11-29 01:32:15,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 01:32:15,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:15,685 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting func_to_recursive_line_29_to_41_0Err20ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:32:15,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:15,686 INFO L85 PathProgramCache]: Analyzing trace with hash 197250107, now seen corresponding path program 1 times [2023-11-29 01:32:15,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:15,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014591283] [2023-11-29 01:32:15,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:15,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:15,701 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:15,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1658604023] [2023-11-29 01:32:15,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:15,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:15,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:15,702 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:15,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 01:32:15,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:15,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 01:32:15,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:15,823 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 11 treesize of output 7 [2023-11-29 01:32:16,013 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 01:32:16,013 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:32:16,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:16,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014591283] [2023-11-29 01:32:16,014 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:16,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658604023] [2023-11-29 01:32:16,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658604023] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:32:16,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:32:16,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:32:16,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604036800] [2023-11-29 01:32:16,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:32:16,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:32:16,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:16,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:32:16,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:32:16,016 INFO L87 Difference]: Start difference. First operand 453 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) [2023-11-29 01:32:16,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:16,249 INFO L93 Difference]: Finished difference Result 588 states and 606 transitions. [2023-11-29 01:32:16,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:32:16,249 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 [2023-11-29 01:32:16,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:16,253 INFO L225 Difference]: With dead ends: 588 [2023-11-29 01:32:16,253 INFO L226 Difference]: Without dead ends: 587 [2023-11-29 01:32:16,253 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 [2023-11-29 01:32:16,254 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 530 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:16,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 1482 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:32:16,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2023-11-29 01:32:16,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 453. [2023-11-29 01:32:16,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 292 states have (on average 1.7773972602739727) internal successors, (519), 425 states have internal predecessors, (519), 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) [2023-11-29 01:32:16,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 565 transitions. [2023-11-29 01:32:16,276 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 565 transitions. Word has length 43 [2023-11-29 01:32:16,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:16,276 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 565 transitions. [2023-11-29 01:32:16,276 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) [2023-11-29 01:32:16,277 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 565 transitions. [2023-11-29 01:32:16,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-29 01:32:16,277 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:16,277 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] [2023-11-29 01:32:16,282 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 01:32:16,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:16,478 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting func_to_recursive_line_29_to_41_0Err21ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:32:16,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:16,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1819786104, now seen corresponding path program 1 times [2023-11-29 01:32:16,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:16,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135220108] [2023-11-29 01:32:16,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:16,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:16,500 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:16,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [175807677] [2023-11-29 01:32:16,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:16,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:16,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:16,502 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:16,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 01:32:16,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:16,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 01:32:16,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:16,618 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 [2023-11-29 01:32:16,829 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 01:32:16,829 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:32:16,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:16,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135220108] [2023-11-29 01:32:16,830 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:16,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175807677] [2023-11-29 01:32:16,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175807677] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:32:16,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:32:16,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:32:16,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435768427] [2023-11-29 01:32:16,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:32:16,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:32:16,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:16,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:32:16,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:32:16,832 INFO L87 Difference]: Start difference. First operand 453 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) [2023-11-29 01:32:17,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:17,076 INFO L93 Difference]: Finished difference Result 587 states and 605 transitions. [2023-11-29 01:32:17,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:32:17,077 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 [2023-11-29 01:32:17,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:17,080 INFO L225 Difference]: With dead ends: 587 [2023-11-29 01:32:17,081 INFO L226 Difference]: Without dead ends: 586 [2023-11-29 01:32:17,081 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 [2023-11-29 01:32:17,082 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 413 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 1453 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:17,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 1453 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:32:17,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2023-11-29 01:32:17,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 453. [2023-11-29 01:32:17,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 292 states have (on average 1.773972602739726) internal successors, (518), 425 states have internal predecessors, (518), 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) [2023-11-29 01:32:17,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 564 transitions. [2023-11-29 01:32:17,102 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 564 transitions. Word has length 44 [2023-11-29 01:32:17,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:17,102 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 564 transitions. [2023-11-29 01:32:17,102 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) [2023-11-29 01:32:17,102 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 564 transitions. [2023-11-29 01:32:17,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-29 01:32:17,103 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:17,103 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] [2023-11-29 01:32:17,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 01:32:17,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:17,306 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting func_to_recursive_line_29_to_41_0Err22ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:32:17,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:17,307 INFO L85 PathProgramCache]: Analyzing trace with hash 578794461, now seen corresponding path program 1 times [2023-11-29 01:32:17,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:17,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951381729] [2023-11-29 01:32:17,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:17,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:17,323 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:17,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1192368844] [2023-11-29 01:32:17,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:17,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:17,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:17,330 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:17,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 01:32:17,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:17,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 01:32:17,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:17,462 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 [2023-11-29 01:32:17,698 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 01:32:17,698 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:32:17,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:17,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951381729] [2023-11-29 01:32:17,698 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:17,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192368844] [2023-11-29 01:32:17,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192368844] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:32:17,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:32:17,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 01:32:17,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084473867] [2023-11-29 01:32:17,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:32:17,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 01:32:17,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:17,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 01:32:17,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:32:17,700 INFO L87 Difference]: Start difference. First operand 453 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) [2023-11-29 01:32:18,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:18,038 INFO L93 Difference]: Finished difference Result 586 states and 604 transitions. [2023-11-29 01:32:18,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:32:18,038 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 [2023-11-29 01:32:18,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:18,041 INFO L225 Difference]: With dead ends: 586 [2023-11-29 01:32:18,041 INFO L226 Difference]: Without dead ends: 585 [2023-11-29 01:32:18,042 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 [2023-11-29 01:32:18,042 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 586 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 1475 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:18,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [591 Valid, 1475 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:32:18,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2023-11-29 01:32:18,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 453. [2023-11-29 01:32:18,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 292 states have (on average 1.7705479452054795) internal successors, (517), 425 states have internal predecessors, (517), 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) [2023-11-29 01:32:18,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 563 transitions. [2023-11-29 01:32:18,062 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 563 transitions. Word has length 45 [2023-11-29 01:32:18,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:18,062 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 563 transitions. [2023-11-29 01:32:18,063 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) [2023-11-29 01:32:18,063 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 563 transitions. [2023-11-29 01:32:18,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-29 01:32:18,063 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:18,064 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] [2023-11-29 01:32:18,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 01:32:18,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:18,264 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting func_to_recursive_line_29_to_41_0Err23ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:32:18,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:18,265 INFO L85 PathProgramCache]: Analyzing trace with hash 762759194, now seen corresponding path program 1 times [2023-11-29 01:32:18,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:18,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494740844] [2023-11-29 01:32:18,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:18,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:18,279 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:18,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1948933757] [2023-11-29 01:32:18,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:18,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:18,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:18,281 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:18,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 01:32:18,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:18,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 01:32:18,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:18,408 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 [2023-11-29 01:32:18,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 01:32:18,647 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:32:18,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:18,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494740844] [2023-11-29 01:32:18,648 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:18,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948933757] [2023-11-29 01:32:18,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948933757] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:32:18,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:32:18,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:32:18,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987281047] [2023-11-29 01:32:18,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:32:18,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:32:18,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:18,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:32:18,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:32:18,650 INFO L87 Difference]: Start difference. First operand 453 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) [2023-11-29 01:32:18,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:18,935 INFO L93 Difference]: Finished difference Result 585 states and 603 transitions. [2023-11-29 01:32:18,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:32:18,936 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 [2023-11-29 01:32:18,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:18,939 INFO L225 Difference]: With dead ends: 585 [2023-11-29 01:32:18,939 INFO L226 Difference]: Without dead ends: 584 [2023-11-29 01:32:18,940 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 [2023-11-29 01:32:18,940 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 340 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 1682 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:18,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 1682 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:32:18,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2023-11-29 01:32:18,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 453. [2023-11-29 01:32:18,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 292 states have (on average 1.7671232876712328) internal successors, (516), 425 states have internal predecessors, (516), 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) [2023-11-29 01:32:18,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 562 transitions. [2023-11-29 01:32:18,963 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 562 transitions. Word has length 46 [2023-11-29 01:32:18,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:18,963 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 562 transitions. [2023-11-29 01:32:18,964 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) [2023-11-29 01:32:18,964 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 562 transitions. [2023-11-29 01:32:18,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-29 01:32:18,964 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:18,964 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] [2023-11-29 01:32:18,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-29 01:32:19,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 01:32:19,165 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting func_to_recursive_line_29_to_41_0Err24ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:32:19,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:19,165 INFO L85 PathProgramCache]: Analyzing trace with hash -2124268673, now seen corresponding path program 1 times [2023-11-29 01:32:19,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:19,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024691500] [2023-11-29 01:32:19,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:19,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:19,178 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:19,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [177173939] [2023-11-29 01:32:19,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:19,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:19,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:19,180 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:19,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 01:32:19,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:19,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 01:32:19,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:19,314 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 [2023-11-29 01:32:19,530 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 01:32:19,531 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:32:19,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:19,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024691500] [2023-11-29 01:32:19,531 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:19,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177173939] [2023-11-29 01:32:19,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177173939] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:32:19,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:32:19,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:32:19,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542234609] [2023-11-29 01:32:19,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:32:19,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:32:19,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:19,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:32:19,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:32:19,533 INFO L87 Difference]: Start difference. First operand 453 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) [2023-11-29 01:32:19,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:19,832 INFO L93 Difference]: Finished difference Result 588 states and 606 transitions. [2023-11-29 01:32:19,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:32:19,832 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 [2023-11-29 01:32:19,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:19,836 INFO L225 Difference]: With dead ends: 588 [2023-11-29 01:32:19,836 INFO L226 Difference]: Without dead ends: 587 [2023-11-29 01:32:19,837 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 [2023-11-29 01:32:19,837 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 518 mSDsluCounter, 1088 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 1360 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:19,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [523 Valid, 1360 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:32:19,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2023-11-29 01:32:19,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 453. [2023-11-29 01:32:19,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 292 states have (on average 1.7636986301369864) internal successors, (515), 425 states have internal predecessors, (515), 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) [2023-11-29 01:32:19,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 561 transitions. [2023-11-29 01:32:19,862 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 561 transitions. Word has length 47 [2023-11-29 01:32:19,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:19,862 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 561 transitions. [2023-11-29 01:32:19,862 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) [2023-11-29 01:32:19,862 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 561 transitions. [2023-11-29 01:32:19,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-29 01:32:19,863 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:19,863 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] [2023-11-29 01:32:19,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 01:32:20,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 01:32:20,070 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting func_to_recursive_line_29_to_41_0Err25ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:32:20,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:20,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1427819332, now seen corresponding path program 1 times [2023-11-29 01:32:20,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:20,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316507396] [2023-11-29 01:32:20,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:20,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:20,085 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:20,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [70861469] [2023-11-29 01:32:20,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:20,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:20,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:20,086 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:20,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 01:32:20,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:20,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 01:32:20,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:20,199 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 [2023-11-29 01:32:20,419 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 01:32:20,419 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:32:20,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:20,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316507396] [2023-11-29 01:32:20,419 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:20,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70861469] [2023-11-29 01:32:20,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70861469] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:32:20,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:32:20,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:32:20,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139502796] [2023-11-29 01:32:20,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:32:20,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:32:20,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:20,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:32:20,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:32:20,421 INFO L87 Difference]: Start difference. First operand 453 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) [2023-11-29 01:32:20,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:20,676 INFO L93 Difference]: Finished difference Result 587 states and 605 transitions. [2023-11-29 01:32:20,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:32:20,676 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 [2023-11-29 01:32:20,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:20,680 INFO L225 Difference]: With dead ends: 587 [2023-11-29 01:32:20,680 INFO L226 Difference]: Without dead ends: 586 [2023-11-29 01:32:20,680 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 [2023-11-29 01:32:20,681 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 336 mSDsluCounter, 1397 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 1670 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:20,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 1670 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:32:20,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2023-11-29 01:32:20,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 453. [2023-11-29 01:32:20,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 292 states have (on average 1.7602739726027397) internal successors, (514), 425 states have internal predecessors, (514), 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) [2023-11-29 01:32:20,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 560 transitions. [2023-11-29 01:32:20,704 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 560 transitions. Word has length 48 [2023-11-29 01:32:20,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:20,704 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 560 transitions. [2023-11-29 01:32:20,704 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) [2023-11-29 01:32:20,704 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 560 transitions. [2023-11-29 01:32:20,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-29 01:32:20,705 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:20,705 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] [2023-11-29 01:32:20,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 01:32:20,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 01:32:20,912 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting func_to_recursive_line_29_to_41_0Err26ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:32:20,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:20,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1312726239, now seen corresponding path program 1 times [2023-11-29 01:32:20,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:20,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602292454] [2023-11-29 01:32:20,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:20,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:20,927 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:20,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [869852208] [2023-11-29 01:32:20,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:20,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:20,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:20,928 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:20,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 01:32:21,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:21,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-29 01:32:21,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:21,052 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 [2023-11-29 01:32:21,059 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 [2023-11-29 01:32:21,063 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 [2023-11-29 01:32:21,628 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 [2023-11-29 01:32:21,758 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 01:32:21,758 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:32:21,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:21,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602292454] [2023-11-29 01:32:21,759 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:21,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869852208] [2023-11-29 01:32:21,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869852208] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:32:21,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:32:21,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 01:32:21,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217319952] [2023-11-29 01:32:21,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:32:21,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 01:32:21,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:21,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 01:32:21,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:32:21,760 INFO L87 Difference]: Start difference. First operand 453 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) [2023-11-29 01:32:22,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:22,434 INFO L93 Difference]: Finished difference Result 582 states and 600 transitions. [2023-11-29 01:32:22,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 01:32:22,435 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 [2023-11-29 01:32:22,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:22,438 INFO L225 Difference]: With dead ends: 582 [2023-11-29 01:32:22,438 INFO L226 Difference]: Without dead ends: 581 [2023-11-29 01:32:22,439 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 [2023-11-29 01:32:22,439 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 610 mSDsluCounter, 1364 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 1616 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:22,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [615 Valid, 1616 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 01:32:22,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2023-11-29 01:32:22,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 453. [2023-11-29 01:32:22,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 292 states have (on average 1.7568493150684932) internal successors, (513), 425 states have internal predecessors, (513), 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) [2023-11-29 01:32:22,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 559 transitions. [2023-11-29 01:32:22,460 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 559 transitions. Word has length 49 [2023-11-29 01:32:22,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:22,460 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 559 transitions. [2023-11-29 01:32:22,460 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) [2023-11-29 01:32:22,460 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 559 transitions. [2023-11-29 01:32:22,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-29 01:32:22,461 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:22,461 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] [2023-11-29 01:32:22,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 01:32:22,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 01:32:22,661 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting func_to_recursive_line_29_to_41_0Err27ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:32:22,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:22,662 INFO L85 PathProgramCache]: Analyzing trace with hash -2039807650, now seen corresponding path program 1 times [2023-11-29 01:32:22,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:22,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238837851] [2023-11-29 01:32:22,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:22,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:22,677 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:22,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1716637946] [2023-11-29 01:32:22,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:22,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:22,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:22,678 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:22,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 01:32:22,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:22,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 01:32:22,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:22,810 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 [2023-11-29 01:32:23,079 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 01:32:23,079 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:32:23,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:23,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238837851] [2023-11-29 01:32:23,079 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:23,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716637946] [2023-11-29 01:32:23,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716637946] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:32:23,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:32:23,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:32:23,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111705161] [2023-11-29 01:32:23,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:32:23,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:32:23,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:23,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:32:23,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:32:23,081 INFO L87 Difference]: Start difference. First operand 453 states and 559 transitions. Second operand has 7 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2023-11-29 01:32:23,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:23,364 INFO L93 Difference]: Finished difference Result 585 states and 603 transitions. [2023-11-29 01:32:23,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:32:23,364 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 50 [2023-11-29 01:32:23,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:23,367 INFO L225 Difference]: With dead ends: 585 [2023-11-29 01:32:23,367 INFO L226 Difference]: Without dead ends: 584 [2023-11-29 01:32:23,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:32:23,368 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 565 mSDsluCounter, 965 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:23,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 1240 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:32:23,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2023-11-29 01:32:23,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 453. [2023-11-29 01:32:23,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 292 states have (on average 1.7534246575342465) internal successors, (512), 425 states have internal predecessors, (512), 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) [2023-11-29 01:32:23,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 558 transitions. [2023-11-29 01:32:23,388 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 558 transitions. Word has length 50 [2023-11-29 01:32:23,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:23,388 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 558 transitions. [2023-11-29 01:32:23,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2023-11-29 01:32:23,389 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 558 transitions. [2023-11-29 01:32:23,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-29 01:32:23,389 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:23,389 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] [2023-11-29 01:32:23,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 01:32:23,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:23,590 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting func_to_recursive_line_29_to_41_0Err28ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:32:23,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:23,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1190472387, now seen corresponding path program 1 times [2023-11-29 01:32:23,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:23,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231516742] [2023-11-29 01:32:23,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:23,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:23,603 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:23,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [223372164] [2023-11-29 01:32:23,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:23,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:23,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:23,604 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:23,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 01:32:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:23,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 01:32:23,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:23,720 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 [2023-11-29 01:32:23,877 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 [2023-11-29 01:32:23,884 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 01:32:23,884 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:32:23,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:23,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231516742] [2023-11-29 01:32:23,885 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:23,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223372164] [2023-11-29 01:32:23,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223372164] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:32:23,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:32:23,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:32:23,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505099071] [2023-11-29 01:32:23,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:32:23,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:32:23,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:23,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:32:23,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:32:23,887 INFO L87 Difference]: Start difference. First operand 453 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) [2023-11-29 01:32:28,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:32:32,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:32:36,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:32:36,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:36,219 INFO L93 Difference]: Finished difference Result 588 states and 606 transitions. [2023-11-29 01:32:36,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:32:36,219 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 [2023-11-29 01:32:36,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:36,222 INFO L225 Difference]: With dead ends: 588 [2023-11-29 01:32:36,222 INFO L226 Difference]: Without dead ends: 587 [2023-11-29 01:32:36,222 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 [2023-11-29 01:32:36,223 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 328 mSDsluCounter, 1275 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 17 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 1547 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:36,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 1547 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 213 Invalid, 3 Unknown, 0 Unchecked, 12.3s Time] [2023-11-29 01:32:36,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2023-11-29 01:32:36,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 453. [2023-11-29 01:32:36,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 292 states have (on average 1.75) internal successors, (511), 425 states have internal predecessors, (511), 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) [2023-11-29 01:32:36,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 557 transitions. [2023-11-29 01:32:36,241 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 557 transitions. Word has length 51 [2023-11-29 01:32:36,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:36,241 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 557 transitions. [2023-11-29 01:32:36,241 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) [2023-11-29 01:32:36,241 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 557 transitions. [2023-11-29 01:32:36,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-29 01:32:36,242 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:36,242 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] [2023-11-29 01:32:36,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 01:32:36,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:36,443 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting func_to_recursive_line_29_to_41_0Err29ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:32:36,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:36,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1750061568, now seen corresponding path program 1 times [2023-11-29 01:32:36,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:36,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794655847] [2023-11-29 01:32:36,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:36,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:36,455 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:36,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1732184084] [2023-11-29 01:32:36,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:36,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:36,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:36,456 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:36,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 01:32:36,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:36,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 01:32:36,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:36,598 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 [2023-11-29 01:32:36,801 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 [2023-11-29 01:32:36,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 01:32:36,814 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:32:36,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:36,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794655847] [2023-11-29 01:32:36,814 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:36,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732184084] [2023-11-29 01:32:36,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732184084] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:32:36,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:32:36,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:32:36,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167347596] [2023-11-29 01:32:36,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:32:36,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:32:36,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:36,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:32:36,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:32:36,816 INFO L87 Difference]: Start difference. First operand 453 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) [2023-11-29 01:32:37,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:37,087 INFO L93 Difference]: Finished difference Result 587 states and 605 transitions. [2023-11-29 01:32:37,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:32:37,088 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 [2023-11-29 01:32:37,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:37,091 INFO L225 Difference]: With dead ends: 587 [2023-11-29 01:32:37,092 INFO L226 Difference]: Without dead ends: 586 [2023-11-29 01:32:37,092 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 [2023-11-29 01:32:37,093 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 559 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 1243 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 [2023-11-29 01:32:37,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 1243 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:32:37,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2023-11-29 01:32:37,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 453. [2023-11-29 01:32:37,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 292 states have (on average 1.7465753424657535) internal successors, (510), 425 states have internal predecessors, (510), 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) [2023-11-29 01:32:37,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 556 transitions. [2023-11-29 01:32:37,115 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 556 transitions. Word has length 52 [2023-11-29 01:32:37,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:37,115 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 556 transitions. [2023-11-29 01:32:37,115 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) [2023-11-29 01:32:37,115 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 556 transitions. [2023-11-29 01:32:37,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-29 01:32:37,116 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:37,116 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] [2023-11-29 01:32:37,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 01:32:37,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 01:32:37,317 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting func_to_recursive_line_29_to_41_0Err30ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:32:37,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:37,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1582666341, now seen corresponding path program 1 times [2023-11-29 01:32:37,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:37,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492392989] [2023-11-29 01:32:37,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:37,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:37,328 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:37,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [416061743] [2023-11-29 01:32:37,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:37,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:37,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:37,330 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:37,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 01:32:37,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:37,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-29 01:32:37,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:37,462 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 [2023-11-29 01:32:37,469 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 [2023-11-29 01:32:37,476 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 [2023-11-29 01:32:38,265 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 [2023-11-29 01:32:38,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 01:32:38,303 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:32:38,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:38,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492392989] [2023-11-29 01:32:38,303 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:38,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416061743] [2023-11-29 01:32:38,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416061743] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:32:38,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:32:38,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 01:32:38,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198623667] [2023-11-29 01:32:38,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:32:38,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 01:32:38,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:38,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 01:32:38,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:32:38,305 INFO L87 Difference]: Start difference. First operand 453 states and 556 transitions. Second operand has 10 states, 8 states have (on average 5.0) internal successors, (40), 8 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) [2023-11-29 01:32:39,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:39,080 INFO L93 Difference]: Finished difference Result 578 states and 596 transitions. [2023-11-29 01:32:39,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 01:32:39,081 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 5.0) internal successors, (40), 8 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 [2023-11-29 01:32:39,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:39,083 INFO L225 Difference]: With dead ends: 578 [2023-11-29 01:32:39,083 INFO L226 Difference]: Without dead ends: 577 [2023-11-29 01:32:39,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2023-11-29 01:32:39,084 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 514 mSDsluCounter, 1794 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 2046 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:39,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 2046 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 01:32:39,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2023-11-29 01:32:39,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 453. [2023-11-29 01:32:39,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 292 states have (on average 1.7431506849315068) internal successors, (509), 425 states have internal predecessors, (509), 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) [2023-11-29 01:32:39,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 555 transitions. [2023-11-29 01:32:39,106 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 555 transitions. Word has length 53 [2023-11-29 01:32:39,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:39,106 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 555 transitions. [2023-11-29 01:32:39,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 5.0) internal successors, (40), 8 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) [2023-11-29 01:32:39,106 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 555 transitions. [2023-11-29 01:32:39,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-29 01:32:39,107 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:39,107 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] [2023-11-29 01:32:39,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 01:32:39,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 01:32:39,307 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting func_to_recursive_line_29_to_41_0Err31ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:32:39,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:39,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1818016418, now seen corresponding path program 1 times [2023-11-29 01:32:39,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:39,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220239826] [2023-11-29 01:32:39,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:39,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:39,319 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:39,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [551482823] [2023-11-29 01:32:39,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:39,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:39,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:39,320 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:39,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 01:32:39,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:39,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-29 01:32:39,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:39,477 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 [2023-11-29 01:32:39,485 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 [2023-11-29 01:32:39,489 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 [2023-11-29 01:32:40,188 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 [2023-11-29 01:32:40,233 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 01:32:40,233 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:32:40,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:40,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220239826] [2023-11-29 01:32:40,234 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:40,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551482823] [2023-11-29 01:32:40,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551482823] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:32:40,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:32:40,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 01:32:40,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238801764] [2023-11-29 01:32:40,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:32:40,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 01:32:40,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:40,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 01:32:40,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:32:40,235 INFO L87 Difference]: Start difference. First operand 453 states and 555 transitions. Second operand has 9 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 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) [2023-11-29 01:32:41,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:41,054 INFO L93 Difference]: Finished difference Result 577 states and 595 transitions. [2023-11-29 01:32:41,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 01:32:41,054 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 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 [2023-11-29 01:32:41,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:41,057 INFO L225 Difference]: With dead ends: 577 [2023-11-29 01:32:41,057 INFO L226 Difference]: Without dead ends: 575 [2023-11-29 01:32:41,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-11-29 01:32:41,058 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 325 mSDsluCounter, 1644 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 1899 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:41,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 1899 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 01:32:41,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2023-11-29 01:32:41,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 453. [2023-11-29 01:32:41,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 292 states have (on average 1.7363013698630136) internal successors, (507), 425 states have internal predecessors, (507), 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) [2023-11-29 01:32:41,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 553 transitions. [2023-11-29 01:32:41,073 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 553 transitions. Word has length 54 [2023-11-29 01:32:41,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:41,073 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 553 transitions. [2023-11-29 01:32:41,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 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) [2023-11-29 01:32:41,073 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 553 transitions. [2023-11-29 01:32:41,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-29 01:32:41,073 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:41,074 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, 1] [2023-11-29 01:32:41,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 01:32:41,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 01:32:41,274 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting func_to_recursive_line_29_to_41_0Err32ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:32:41,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:41,275 INFO L85 PathProgramCache]: Analyzing trace with hash 523934215, now seen corresponding path program 1 times [2023-11-29 01:32:41,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:41,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310759192] [2023-11-29 01:32:41,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:41,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:41,288 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:41,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1773099565] [2023-11-29 01:32:41,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:41,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:41,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:41,289 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:41,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 01:32:41,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:41,413 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 01:32:41,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:41,420 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 [2023-11-29 01:32:41,645 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 [2023-11-29 01:32:41,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 01:32:41,681 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:32:41,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:41,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310759192] [2023-11-29 01:32:41,681 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:41,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773099565] [2023-11-29 01:32:41,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773099565] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:32:41,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:32:41,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 01:32:41,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808575667] [2023-11-29 01:32:41,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:32:41,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 01:32:41,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:41,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 01:32:41,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:32:41,692 INFO L87 Difference]: Start difference. First operand 453 states and 553 transitions. Second operand has 8 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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) [2023-11-29 01:32:45,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:32:50,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:32:54,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:32:54,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:54,188 INFO L93 Difference]: Finished difference Result 583 states and 601 transitions. [2023-11-29 01:32:54,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:32:54,188 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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 55 [2023-11-29 01:32:54,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:54,191 INFO L225 Difference]: With dead ends: 583 [2023-11-29 01:32:54,192 INFO L226 Difference]: Without dead ends: 582 [2023-11-29 01:32:54,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:32:54,192 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 487 mSDsluCounter, 1418 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 17 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 1695 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:54,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [492 Valid, 1695 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 287 Invalid, 3 Unknown, 0 Unchecked, 12.4s Time] [2023-11-29 01:32:54,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2023-11-29 01:32:54,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 453. [2023-11-29 01:32:54,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 292 states have (on average 1.7328767123287672) internal successors, (506), 425 states have internal predecessors, (506), 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) [2023-11-29 01:32:54,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 552 transitions. [2023-11-29 01:32:54,207 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 552 transitions. Word has length 55 [2023-11-29 01:32:54,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:54,207 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 552 transitions. [2023-11-29 01:32:54,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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) [2023-11-29 01:32:54,207 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 552 transitions. [2023-11-29 01:32:54,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-29 01:32:54,207 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:54,207 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] [2023-11-29 01:32:54,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 01:32:54,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 01:32:54,408 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting func_to_recursive_line_29_to_41_0Err34ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:32:54,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:54,408 INFO L85 PathProgramCache]: Analyzing trace with hash 653631038, now seen corresponding path program 1 times [2023-11-29 01:32:54,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:54,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689576367] [2023-11-29 01:32:54,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:54,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:54,421 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:54,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1921510659] [2023-11-29 01:32:54,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:54,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:54,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:54,423 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:54,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 01:32:54,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:54,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 01:32:54,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:54,552 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 [2023-11-29 01:32:54,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-11-29 01:32:54,827 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 01:32:54,827 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:32:54,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:54,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689576367] [2023-11-29 01:32:54,827 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:54,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921510659] [2023-11-29 01:32:54,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921510659] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:32:54,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:32:54,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:32:54,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504929727] [2023-11-29 01:32:54,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:32:54,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:32:54,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:54,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:32:54,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:32:54,829 INFO L87 Difference]: Start difference. First operand 453 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) [2023-11-29 01:32:59,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:33:03,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:33:07,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:33:07,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:33:07,199 INFO L93 Difference]: Finished difference Result 582 states and 600 transitions. [2023-11-29 01:33:07,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:33:07,199 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 [2023-11-29 01:33:07,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:33:07,203 INFO L225 Difference]: With dead ends: 582 [2023-11-29 01:33:07,203 INFO L226 Difference]: Without dead ends: 581 [2023-11-29 01:33:07,203 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 [2023-11-29 01:33:07,204 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 499 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 15 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 1447 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:33:07,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 1447 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 220 Invalid, 3 Unknown, 0 Unchecked, 12.3s Time] [2023-11-29 01:33:07,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2023-11-29 01:33:07,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 453. [2023-11-29 01:33:07,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 292 states have (on average 1.7294520547945205) internal successors, (505), 425 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) [2023-11-29 01:33:07,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 551 transitions. [2023-11-29 01:33:07,219 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 551 transitions. Word has length 63 [2023-11-29 01:33:07,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:33:07,219 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 551 transitions. [2023-11-29 01:33:07,219 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) [2023-11-29 01:33:07,219 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 551 transitions. [2023-11-29 01:33:07,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-29 01:33:07,219 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:33:07,219 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] [2023-11-29 01:33:07,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 01:33:07,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 01:33:07,420 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting func_to_recursive_line_29_to_41_0Err35ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:33:07,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:33:07,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1212274189, now seen corresponding path program 1 times [2023-11-29 01:33:07,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:33:07,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49838563] [2023-11-29 01:33:07,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:07,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:33:07,436 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:33:07,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2060548665] [2023-11-29 01:33:07,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:07,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:07,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:33:07,437 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:33:07,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 01:33:07,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:33:07,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 01:33:07,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:33:07,549 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 [2023-11-29 01:33:07,825 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 01:33:07,825 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:33:07,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:33:07,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49838563] [2023-11-29 01:33:07,825 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:33:07,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060548665] [2023-11-29 01:33:07,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060548665] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:33:07,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:33:07,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:33:07,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774474532] [2023-11-29 01:33:07,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:33:07,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:33:07,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:33:07,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:33:07,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:33:07,827 INFO L87 Difference]: Start difference. First operand 453 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) [2023-11-29 01:33:08,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:33:08,098 INFO L93 Difference]: Finished difference Result 581 states and 599 transitions. [2023-11-29 01:33:08,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:33:08,099 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 [2023-11-29 01:33:08,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:33:08,102 INFO L225 Difference]: With dead ends: 581 [2023-11-29 01:33:08,102 INFO L226 Difference]: Without dead ends: 580 [2023-11-29 01:33:08,102 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 [2023-11-29 01:33:08,103 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 317 mSDsluCounter, 1268 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 1538 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:33:08,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 1538 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:33:08,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2023-11-29 01:33:08,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 453. [2023-11-29 01:33:08,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 292 states have (on average 1.726027397260274) internal successors, (504), 425 states have internal predecessors, (504), 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) [2023-11-29 01:33:08,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 550 transitions. [2023-11-29 01:33:08,117 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 550 transitions. Word has length 64 [2023-11-29 01:33:08,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:33:08,118 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 550 transitions. [2023-11-29 01:33:08,118 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) [2023-11-29 01:33:08,118 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 550 transitions. [2023-11-29 01:33:08,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-29 01:33:08,118 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:33:08,118 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] [2023-11-29 01:33:08,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 01:33:08,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 01:33:08,319 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting func_to_recursive_line_29_to_41_0Err36ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:33:08,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:33:08,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1074205920, now seen corresponding path program 1 times [2023-11-29 01:33:08,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:33:08,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247310980] [2023-11-29 01:33:08,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:08,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:33:08,334 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:33:08,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1996521237] [2023-11-29 01:33:08,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:08,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:08,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:33:08,336 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:33:08,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 01:33:08,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:33:08,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:33:08,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:33:08,519 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 [2023-11-29 01:33:08,534 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 01:33:08,534 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:33:08,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:33:08,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247310980] [2023-11-29 01:33:08,534 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:33:08,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996521237] [2023-11-29 01:33:08,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996521237] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:33:08,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:33:08,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:33:08,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800946550] [2023-11-29 01:33:08,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:33:08,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:33:08,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:33:08,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:33:08,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:33:08,536 INFO L87 Difference]: Start difference. First operand 453 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) [2023-11-29 01:33:12,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:33:12,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:33:12,785 INFO L93 Difference]: Finished difference Result 457 states and 553 transitions. [2023-11-29 01:33:12,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:33:12,786 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 [2023-11-29 01:33:12,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:33:12,788 INFO L225 Difference]: With dead ends: 457 [2023-11-29 01:33:12,788 INFO L226 Difference]: Without dead ends: 456 [2023-11-29 01:33:12,788 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 [2023-11-29 01:33:12,789 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 355 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:33:12,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 1017 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 171 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2023-11-29 01:33:12,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2023-11-29 01:33:12,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 456. [2023-11-29 01:33:12,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 295 states have (on average 1.7118644067796611) internal successors, (505), 427 states have internal predecessors, (505), 22 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-29 01:33:12,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 551 transitions. [2023-11-29 01:33:12,813 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 551 transitions. Word has length 65 [2023-11-29 01:33:12,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:33:12,813 INFO L495 AbstractCegarLoop]: Abstraction has 456 states and 551 transitions. [2023-11-29 01:33:12,813 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) [2023-11-29 01:33:12,814 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 551 transitions. [2023-11-29 01:33:12,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-29 01:33:12,814 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:33:12,814 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] [2023-11-29 01:33:12,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 01:33:13,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 01:33:13,015 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting func_to_recursive_line_29_to_41_0Err37ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:33:13,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:33:13,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1059354731, now seen corresponding path program 1 times [2023-11-29 01:33:13,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:33:13,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117049642] [2023-11-29 01:33:13,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:13,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:33:13,030 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:33:13,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1392533694] [2023-11-29 01:33:13,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:13,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:13,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:33:13,031 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:33:13,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 01:33:13,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:33:13,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:33:13,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:33:13,219 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 [2023-11-29 01:33:13,229 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 01:33:13,229 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:33:13,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:33:13,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117049642] [2023-11-29 01:33:13,230 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:33:13,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392533694] [2023-11-29 01:33:13,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392533694] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:33:13,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:33:13,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:33:13,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49572337] [2023-11-29 01:33:13,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:33:13,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:33:13,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:33:13,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:33:13,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:33:13,231 INFO L87 Difference]: Start difference. First operand 456 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) [2023-11-29 01:33:17,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:33:17,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:33:17,490 INFO L93 Difference]: Finished difference Result 456 states and 551 transitions. [2023-11-29 01:33:17,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:33:17,490 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 66 [2023-11-29 01:33:17,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:33:17,493 INFO L225 Difference]: With dead ends: 456 [2023-11-29 01:33:17,493 INFO L226 Difference]: Without dead ends: 455 [2023-11-29 01:33:17,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:33:17,494 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 304 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:33:17,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 1041 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 172 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2023-11-29 01:33:17,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2023-11-29 01:33:17,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 455. [2023-11-29 01:33:17,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 295 states have (on average 1.7050847457627119) internal successors, (503), 426 states have internal predecessors, (503), 22 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-29 01:33:17,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 549 transitions. [2023-11-29 01:33:17,508 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 549 transitions. Word has length 66 [2023-11-29 01:33:17,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:33:17,509 INFO L495 AbstractCegarLoop]: Abstraction has 455 states and 549 transitions. [2023-11-29 01:33:17,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2023-11-29 01:33:17,509 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 549 transitions. [2023-11-29 01:33:17,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-29 01:33:17,509 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:33:17,509 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, 1] [2023-11-29 01:33:17,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 01:33:17,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 01:33:17,710 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting func_to_recursive_line_29_to_41_0Err38ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:33:17,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:33:17,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1519741826, now seen corresponding path program 1 times [2023-11-29 01:33:17,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:33:17,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646180248] [2023-11-29 01:33:17,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:17,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:33:17,725 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:33:17,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1002096650] [2023-11-29 01:33:17,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:17,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:17,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:33:17,726 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:33:17,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 01:33:17,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:33:17,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 01:33:17,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:33:17,867 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 [2023-11-29 01:33:18,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-11-29 01:33:18,138 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 01:33:18,138 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:33:18,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:33:18,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646180248] [2023-11-29 01:33:18,139 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:33:18,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002096650] [2023-11-29 01:33:18,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002096650] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:33:18,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:33:18,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 01:33:18,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581928759] [2023-11-29 01:33:18,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:33:18,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 01:33:18,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:33:18,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 01:33:18,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:33:18,141 INFO L87 Difference]: Start difference. First operand 455 states and 549 transitions. Second operand has 8 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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) [2023-11-29 01:33:22,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:33:26,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:33:30,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:33:30,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:33:30,494 INFO L93 Difference]: Finished difference Result 580 states and 597 transitions. [2023-11-29 01:33:30,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:33:30,495 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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 67 [2023-11-29 01:33:30,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:33:30,497 INFO L225 Difference]: With dead ends: 580 [2023-11-29 01:33:30,497 INFO L226 Difference]: Without dead ends: 579 [2023-11-29 01:33:30,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:33:30,498 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 360 mSDsluCounter, 1153 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 15 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:33:30,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 1422 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 218 Invalid, 3 Unknown, 0 Unchecked, 12.3s Time] [2023-11-29 01:33:30,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2023-11-29 01:33:30,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 455. [2023-11-29 01:33:30,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 295 states have (on average 1.7016949152542373) internal successors, (502), 426 states have internal predecessors, (502), 22 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-29 01:33:30,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 548 transitions. [2023-11-29 01:33:30,512 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 548 transitions. Word has length 67 [2023-11-29 01:33:30,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:33:30,512 INFO L495 AbstractCegarLoop]: Abstraction has 455 states and 548 transitions. [2023-11-29 01:33:30,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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) [2023-11-29 01:33:30,512 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 548 transitions. [2023-11-29 01:33:30,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-29 01:33:30,513 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:33:30,513 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, 1, 1] [2023-11-29 01:33:30,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 01:33:30,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 01:33:30,714 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting func_to_recursive_line_29_to_41_0Err39ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:33:30,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:33:30,714 INFO L85 PathProgramCache]: Analyzing trace with hash -132643529, now seen corresponding path program 1 times [2023-11-29 01:33:30,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:33:30,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615152291] [2023-11-29 01:33:30,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:30,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:33:30,727 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:33:30,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436712315] [2023-11-29 01:33:30,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:30,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:30,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:33:30,729 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:33:30,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 01:33:30,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:33:30,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 01:33:30,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:33:30,857 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 [2023-11-29 01:33:31,121 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 01:33:31,121 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:33:31,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:33:31,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615152291] [2023-11-29 01:33:31,121 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:33:31,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436712315] [2023-11-29 01:33:31,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436712315] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:33:31,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:33:31,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:33:31,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246825363] [2023-11-29 01:33:31,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:33:31,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:33:31,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:33:31,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:33:31,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:33:31,123 INFO L87 Difference]: Start difference. First operand 455 states and 548 transitions. Second operand has 7 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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) [2023-11-29 01:33:31,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:33:31,384 INFO L93 Difference]: Finished difference Result 575 states and 592 transitions. [2023-11-29 01:33:31,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:33:31,384 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 68 [2023-11-29 01:33:31,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:33:31,386 INFO L225 Difference]: With dead ends: 575 [2023-11-29 01:33:31,386 INFO L226 Difference]: Without dead ends: 574 [2023-11-29 01:33:31,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 55 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:33:31,387 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 469 mSDsluCounter, 1068 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:33:31,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 1341 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:33:31,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2023-11-29 01:33:31,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 455. [2023-11-29 01:33:31,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 295 states have (on average 1.6983050847457628) internal successors, (501), 426 states have internal predecessors, (501), 22 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-29 01:33:31,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 547 transitions. [2023-11-29 01:33:31,402 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 547 transitions. Word has length 68 [2023-11-29 01:33:31,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:33:31,402 INFO L495 AbstractCegarLoop]: Abstraction has 455 states and 547 transitions. [2023-11-29 01:33:31,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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) [2023-11-29 01:33:31,402 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 547 transitions. [2023-11-29 01:33:31,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-29 01:33:31,403 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:33:31,403 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, 1, 1, 1] [2023-11-29 01:33:31,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-29 01:33:31,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:31,604 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting func_to_recursive_line_29_to_41_0Err40ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:33:31,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:33:31,604 INFO L85 PathProgramCache]: Analyzing trace with hash 183018020, now seen corresponding path program 1 times [2023-11-29 01:33:31,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:33:31,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744652881] [2023-11-29 01:33:31,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:31,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:33:31,619 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:33:31,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [449059688] [2023-11-29 01:33:31,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:31,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:31,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:33:31,621 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:33:31,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 01:33:31,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:33:31,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 01:33:31,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:33:31,767 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 [2023-11-29 01:33:32,038 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 [2023-11-29 01:33:32,047 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 01:33:32,047 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:33:32,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:33:32,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744652881] [2023-11-29 01:33:32,048 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:33:32,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449059688] [2023-11-29 01:33:32,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449059688] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:33:32,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:33:32,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:33:32,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648226774] [2023-11-29 01:33:32,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:33:32,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:33:32,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:33:32,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:33:32,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:33:32,050 INFO L87 Difference]: Start difference. First operand 455 states and 547 transitions. Second operand has 7 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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) [2023-11-29 01:33:36,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:33:40,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:33:44,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:33:44,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:33:44,426 INFO L93 Difference]: Finished difference Result 578 states and 595 transitions. [2023-11-29 01:33:44,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:33:44,426 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 69 [2023-11-29 01:33:44,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:33:44,429 INFO L225 Difference]: With dead ends: 578 [2023-11-29 01:33:44,429 INFO L226 Difference]: Without dead ends: 577 [2023-11-29 01:33:44,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:33:44,430 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 291 mSDsluCounter, 1374 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 15 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 1644 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:33:44,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 1644 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 221 Invalid, 3 Unknown, 0 Unchecked, 12.3s Time] [2023-11-29 01:33:44,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2023-11-29 01:33:44,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 455. [2023-11-29 01:33:44,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 295 states have (on average 1.694915254237288) internal successors, (500), 426 states have internal predecessors, (500), 22 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-29 01:33:44,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 546 transitions. [2023-11-29 01:33:44,445 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 546 transitions. Word has length 69 [2023-11-29 01:33:44,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:33:44,446 INFO L495 AbstractCegarLoop]: Abstraction has 455 states and 546 transitions. [2023-11-29 01:33:44,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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) [2023-11-29 01:33:44,446 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 546 transitions. [2023-11-29 01:33:44,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-29 01:33:44,446 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:33:44,446 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, 1, 1, 1, 1] [2023-11-29 01:33:44,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 01:33:44,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-29 01:33:44,647 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting func_to_recursive_line_29_to_41_0Err41ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:33:44,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:33:44,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1378591449, now seen corresponding path program 1 times [2023-11-29 01:33:44,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:33:44,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188743519] [2023-11-29 01:33:44,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:44,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:33:44,660 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:33:44,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1452406641] [2023-11-29 01:33:44,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:44,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:44,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:33:44,661 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:33:44,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 01:33:44,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:33:44,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 01:33:44,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:33:44,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:33:45,109 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 [2023-11-29 01:33:45,119 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 01:33:45,120 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:33:45,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:33:45,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188743519] [2023-11-29 01:33:45,120 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:33:45,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452406641] [2023-11-29 01:33:45,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452406641] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:33:45,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:33:45,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:33:45,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044546765] [2023-11-29 01:33:45,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:33:45,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:33:45,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:33:45,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:33:45,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:33:45,122 INFO L87 Difference]: Start difference. First operand 455 states and 546 transitions. Second operand has 7 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 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) [2023-11-29 01:33:45,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:33:45,364 INFO L93 Difference]: Finished difference Result 577 states and 594 transitions. [2023-11-29 01:33:45,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:33:45,365 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 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 70 [2023-11-29 01:33:45,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:33:45,367 INFO L225 Difference]: With dead ends: 577 [2023-11-29 01:33:45,367 INFO L226 Difference]: Without dead ends: 576 [2023-11-29 01:33:45,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 57 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:33:45,368 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 287 mSDsluCounter, 1375 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 1646 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:33:45,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 1646 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:33:45,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2023-11-29 01:33:45,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 455. [2023-11-29 01:33:45,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 295 states have (on average 1.6915254237288135) internal successors, (499), 426 states have internal predecessors, (499), 22 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-29 01:33:45,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 545 transitions. [2023-11-29 01:33:45,384 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 545 transitions. Word has length 70 [2023-11-29 01:33:45,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:33:45,385 INFO L495 AbstractCegarLoop]: Abstraction has 455 states and 545 transitions. [2023-11-29 01:33:45,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 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) [2023-11-29 01:33:45,385 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 545 transitions. [2023-11-29 01:33:45,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-29 01:33:45,385 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:33:45,385 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, 1, 1, 1, 1, 1] [2023-11-29 01:33:45,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 01:33:45,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-29 01:33:45,586 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting func_to_recursive_line_29_to_41_0Err42ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:33:45,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:33:45,586 INFO L85 PathProgramCache]: Analyzing trace with hash -213337914, now seen corresponding path program 1 times [2023-11-29 01:33:45,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:33:45,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853504081] [2023-11-29 01:33:45,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:45,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:33:45,598 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:33:45,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [261232030] [2023-11-29 01:33:45,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:45,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:45,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:33:45,599 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:33:45,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 01:33:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:33:45,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-29 01:33:45,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:33:45,749 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 [2023-11-29 01:33:45,754 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 [2023-11-29 01:33:45,763 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 [2023-11-29 01:33:46,915 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 01:33:46,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:33:47,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:33:47,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853504081] [2023-11-29 01:33:47,171 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:33:47,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261232030] [2023-11-29 01:33:47,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261232030] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:33:47,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:33:47,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-11-29 01:33:47,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632966896] [2023-11-29 01:33:47,172 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:33:47,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 01:33:47,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:33:47,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 01:33:47,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2023-11-29 01:33:47,173 INFO L87 Difference]: Start difference. First operand 455 states and 545 transitions. Second operand has 13 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 01:33:48,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:33:48,346 INFO L93 Difference]: Finished difference Result 572 states and 589 transitions. [2023-11-29 01:33:48,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 01:33:48,346 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 71 [2023-11-29 01:33:48,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:33:48,349 INFO L225 Difference]: With dead ends: 572 [2023-11-29 01:33:48,350 INFO L226 Difference]: Without dead ends: 570 [2023-11-29 01:33:48,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2023-11-29 01:33:48,351 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 352 mSDsluCounter, 2091 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 2340 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 01:33:48,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 2340 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 01:33:48,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2023-11-29 01:33:48,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 455. [2023-11-29 01:33:48,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 295 states have (on average 1.6847457627118645) internal successors, (497), 426 states have internal predecessors, (497), 22 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-29 01:33:48,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 543 transitions. [2023-11-29 01:33:48,373 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 543 transitions. Word has length 71 [2023-11-29 01:33:48,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:33:48,374 INFO L495 AbstractCegarLoop]: Abstraction has 455 states and 543 transitions. [2023-11-29 01:33:48,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 01:33:48,374 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 543 transitions. [2023-11-29 01:33:48,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-29 01:33:48,374 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:33:48,374 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, 1, 1, 1, 1, 1, 1] [2023-11-29 01:33:48,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-29 01:33:48,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:48,575 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting func_to_recursive_line_29_to_41_0Err43ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:33:48,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:33:48,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1976459387, now seen corresponding path program 1 times [2023-11-29 01:33:48,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:33:48,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99134518] [2023-11-29 01:33:48,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:48,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:33:48,591 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:33:48,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1269148758] [2023-11-29 01:33:48,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:48,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:48,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:33:48,592 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:33:48,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 01:33:48,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:33:48,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 01:33:48,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:33:48,727 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 [2023-11-29 01:33:48,732 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 [2023-11-29 01:33:49,386 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 [2023-11-29 01:33:49,429 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 01:33:49,429 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:33:49,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:33:49,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99134518] [2023-11-29 01:33:49,430 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:33:49,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269148758] [2023-11-29 01:33:49,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269148758] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:33:49,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:33:49,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 01:33:49,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206750860] [2023-11-29 01:33:49,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:33:49,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 01:33:49,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:33:49,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 01:33:49,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:33:49,432 INFO L87 Difference]: Start difference. First operand 455 states and 543 transitions. Second operand has 8 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 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) [2023-11-29 01:33:49,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:33:49,964 INFO L93 Difference]: Finished difference Result 570 states and 587 transitions. [2023-11-29 01:33:49,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:33:49,964 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 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 72 [2023-11-29 01:33:49,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:33:49,967 INFO L225 Difference]: With dead ends: 570 [2023-11-29 01:33:49,967 INFO L226 Difference]: Without dead ends: 568 [2023-11-29 01:33:49,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 58 SyntacticMatches, 7 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:33:49,967 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 303 mSDsluCounter, 1354 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 1617 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:33:49,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 1617 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:33:49,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2023-11-29 01:33:49,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 455. [2023-11-29 01:33:49,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 295 states have (on average 1.6779661016949152) internal successors, (495), 426 states have internal predecessors, (495), 22 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-29 01:33:49,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 541 transitions. [2023-11-29 01:33:49,990 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 541 transitions. Word has length 72 [2023-11-29 01:33:49,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:33:49,990 INFO L495 AbstractCegarLoop]: Abstraction has 455 states and 541 transitions. [2023-11-29 01:33:49,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 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) [2023-11-29 01:33:49,991 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 541 transitions. [2023-11-29 01:33:49,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-29 01:33:49,992 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:33:49,992 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:33:49,996 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-29 01:33:50,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-29 01:33:50,192 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting func_to_recursive_line_29_to_41_0Err46ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:33:50,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:33:50,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1288863902, now seen corresponding path program 1 times [2023-11-29 01:33:50,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:33:50,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083843934] [2023-11-29 01:33:50,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:50,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:33:50,207 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:33:50,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [247452248] [2023-11-29 01:33:50,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:50,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:50,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:33:50,209 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:33:50,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 01:33:50,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:33:50,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:33:50,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:33:50,582 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 17 treesize of output 9 [2023-11-29 01:33:50,591 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 01:33:50,592 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:33:50,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:33:50,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083843934] [2023-11-29 01:33:50,592 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:33:50,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247452248] [2023-11-29 01:33:50,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247452248] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:33:50,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:33:50,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:33:50,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734248653] [2023-11-29 01:33:50,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:33:50,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:33:50,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:33:50,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:33:50,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:33:50,594 INFO L87 Difference]: Start difference. First operand 455 states and 541 transitions. Second operand has 6 states, 5 states have (on average 11.8) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-29 01:33:50,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:33:50,767 INFO L93 Difference]: Finished difference Result 455 states and 541 transitions. [2023-11-29 01:33:50,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:33:50,768 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.8) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 82 [2023-11-29 01:33:50,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:33:50,771 INFO L225 Difference]: With dead ends: 455 [2023-11-29 01:33:50,771 INFO L226 Difference]: Without dead ends: 454 [2023-11-29 01:33:50,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 68 SyntacticMatches, 9 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:33:50,772 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 310 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 1011 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:33:50,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 1011 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:33:50,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2023-11-29 01:33:50,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 454. [2023-11-29 01:33:50,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 295 states have (on average 1.6745762711864407) internal successors, (494), 425 states have internal predecessors, (494), 22 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-29 01:33:50,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 540 transitions. [2023-11-29 01:33:50,801 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 540 transitions. Word has length 82 [2023-11-29 01:33:50,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:33:50,801 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 540 transitions. [2023-11-29 01:33:50,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.8) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-29 01:33:50,801 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 540 transitions. [2023-11-29 01:33:50,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-29 01:33:50,802 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:33:50,802 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:33:50,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-29 01:33:51,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:51,003 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting func_to_recursive_line_29_to_41_0Err47ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:33:51,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:33:51,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1300075155, now seen corresponding path program 1 times [2023-11-29 01:33:51,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:33:51,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931524180] [2023-11-29 01:33:51,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:51,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:33:51,016 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:33:51,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [222145508] [2023-11-29 01:33:51,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:51,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:51,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:33:51,017 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:33:51,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-29 01:33:51,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:33:51,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:33:51,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:33:51,334 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 [2023-11-29 01:33:51,342 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 01:33:51,343 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:33:51,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:33:51,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931524180] [2023-11-29 01:33:51,343 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:33:51,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222145508] [2023-11-29 01:33:51,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222145508] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:33:51,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:33:51,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:33:51,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919907641] [2023-11-29 01:33:51,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:33:51,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:33:51,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:33:51,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:33:51,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:33:51,344 INFO L87 Difference]: Start difference. First operand 454 states and 540 transitions. Second operand has 6 states, 5 states have (on average 12.0) internal successors, (60), 6 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-29 01:33:55,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:33:55,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:33:55,546 INFO L93 Difference]: Finished difference Result 454 states and 540 transitions. [2023-11-29 01:33:55,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:33:55,547 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.0) internal successors, (60), 6 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 83 [2023-11-29 01:33:55,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:33:55,549 INFO L225 Difference]: With dead ends: 454 [2023-11-29 01:33:55,549 INFO L226 Difference]: Without dead ends: 453 [2023-11-29 01:33:55,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 69 SyntacticMatches, 9 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:33:55,550 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 237 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 1039 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:33:55,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 1039 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 116 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2023-11-29 01:33:55,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2023-11-29 01:33:55,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 453. [2023-11-29 01:33:55,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 295 states have (on average 1.6711864406779662) internal successors, (493), 424 states have internal predecessors, (493), 22 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-29 01:33:55,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 539 transitions. [2023-11-29 01:33:55,565 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 539 transitions. Word has length 83 [2023-11-29 01:33:55,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:33:55,566 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 539 transitions. [2023-11-29 01:33:55,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.0) internal successors, (60), 6 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-29 01:33:55,566 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 539 transitions. [2023-11-29 01:33:55,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-29 01:33:55,566 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:33:55,567 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:33:55,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-29 01:33:55,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:55,767 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting func_to_recursive_line_29_to_41_0Err48ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:33:55,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:33:55,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1647623996, now seen corresponding path program 1 times [2023-11-29 01:33:55,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:33:55,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374949625] [2023-11-29 01:33:55,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:55,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:33:55,782 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:33:55,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1425577518] [2023-11-29 01:33:55,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:55,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:55,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:33:55,783 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:33:55,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-29 01:33:55,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:33:55,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 01:33:55,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:33:56,209 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 [2023-11-29 01:33:56,213 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 [2023-11-29 01:33:56,227 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 01:33:56,228 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:33:56,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:33:56,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374949625] [2023-11-29 01:33:56,228 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:33:56,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425577518] [2023-11-29 01:33:56,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425577518] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:33:56,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:33:56,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 01:33:56,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062393497] [2023-11-29 01:33:56,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:33:56,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 01:33:56,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:33:56,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 01:33:56,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:33:56,230 INFO L87 Difference]: Start difference. First operand 453 states and 539 transitions. Second operand has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 8 states have internal predecessors, (64), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 01:34:00,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:34:04,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:34:04,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:34:04,755 INFO L93 Difference]: Finished difference Result 453 states and 539 transitions. [2023-11-29 01:34:04,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 01:34:04,756 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 8 states have internal predecessors, (64), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 84 [2023-11-29 01:34:04,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:34:04,759 INFO L225 Difference]: With dead ends: 453 [2023-11-29 01:34:04,759 INFO L226 Difference]: Without dead ends: 452 [2023-11-29 01:34:04,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-11-29 01:34:04,760 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 305 mSDsluCounter, 1193 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 1453 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:34:04,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 1453 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 302 Invalid, 2 Unknown, 0 Unchecked, 8.4s Time] [2023-11-29 01:34:04,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2023-11-29 01:34:04,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 452. [2023-11-29 01:34:04,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 295 states have (on average 1.6677966101694914) internal successors, (492), 423 states have internal predecessors, (492), 22 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-29 01:34:04,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 538 transitions. [2023-11-29 01:34:04,782 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 538 transitions. Word has length 84 [2023-11-29 01:34:04,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:34:04,782 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 538 transitions. [2023-11-29 01:34:04,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 8 states have internal predecessors, (64), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 01:34:04,783 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 538 transitions. [2023-11-29 01:34:04,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-29 01:34:04,783 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:34:04,783 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:34:04,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-29 01:34:04,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-29 01:34:04,984 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:34:04,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:34:04,984 INFO L85 PathProgramCache]: Analyzing trace with hash 463128962, now seen corresponding path program 1 times [2023-11-29 01:34:04,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:34:04,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519904400] [2023-11-29 01:34:04,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:04,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:34:04,998 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:34:04,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1442970476] [2023-11-29 01:34:04,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:04,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:34:04,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:34:05,000 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:34:05,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-29 01:34:05,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:34:05,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:34:05,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:34:05,139 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 [2023-11-29 01:34:05,234 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 01:34:05,235 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:34:05,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:34:05,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519904400] [2023-11-29 01:34:05,235 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:34:05,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442970476] [2023-11-29 01:34:05,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442970476] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:34:05,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:34:05,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:34:05,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697614709] [2023-11-29 01:34:05,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:34:05,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:34:05,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:34:05,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:34:05,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:34:05,237 INFO L87 Difference]: Start difference. First operand 452 states and 538 transitions. Second operand has 5 states, 4 states have (on average 15.25) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 01:34:05,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:34:05,412 INFO L93 Difference]: Finished difference Result 553 states and 570 transitions. [2023-11-29 01:34:05,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:34:05,412 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 15.25) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 85 [2023-11-29 01:34:05,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:34:05,415 INFO L225 Difference]: With dead ends: 553 [2023-11-29 01:34:05,415 INFO L226 Difference]: Without dead ends: 551 [2023-11-29 01:34:05,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:34:05,416 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 221 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:34:05,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 1003 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:34:05,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2023-11-29 01:34:05,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 452. [2023-11-29 01:34:05,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 295 states have (on average 1.6610169491525424) internal successors, (490), 423 states have internal predecessors, (490), 22 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-29 01:34:05,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 536 transitions. [2023-11-29 01:34:05,433 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 536 transitions. Word has length 85 [2023-11-29 01:34:05,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:34:05,434 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 536 transitions. [2023-11-29 01:34:05,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 15.25) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 01:34:05,434 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 536 transitions. [2023-11-29 01:34:05,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-29 01:34:05,435 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:34:05,435 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:34:05,441 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-29 01:34:05,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-29 01:34:05,636 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting func_to_recursive_line_29_to_41_0Err49ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:34:05,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:34:05,636 INFO L85 PathProgramCache]: Analyzing trace with hash 463263823, now seen corresponding path program 1 times [2023-11-29 01:34:05,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:34:05,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276607152] [2023-11-29 01:34:05,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:05,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:34:05,650 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:34:05,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1502948374] [2023-11-29 01:34:05,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:05,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:34:05,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:34:05,651 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:34:05,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-29 01:34:05,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:34:05,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 01:34:05,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:34:06,082 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 [2023-11-29 01:34:06,087 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 [2023-11-29 01:34:06,107 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 01:34:06,107 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:34:06,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:34:06,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276607152] [2023-11-29 01:34:06,107 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:34:06,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502948374] [2023-11-29 01:34:06,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502948374] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:34:06,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:34:06,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 01:34:06,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930847843] [2023-11-29 01:34:06,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:34:06,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 01:34:06,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:34:06,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 01:34:06,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:34:06,109 INFO L87 Difference]: Start difference. First operand 452 states and 536 transitions. Second operand has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 8 states have internal predecessors, (65), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 01:34:10,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:34:14,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:34:14,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:34:14,544 INFO L93 Difference]: Finished difference Result 452 states and 536 transitions. [2023-11-29 01:34:14,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 01:34:14,544 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 8 states have internal predecessors, (65), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 85 [2023-11-29 01:34:14,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:34:14,547 INFO L225 Difference]: With dead ends: 452 [2023-11-29 01:34:14,548 INFO L226 Difference]: Without dead ends: 451 [2023-11-29 01:34:14,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 75 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-11-29 01:34:14,549 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 345 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:34:14,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 1040 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 210 Invalid, 2 Unknown, 0 Unchecked, 8.3s Time] [2023-11-29 01:34:14,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2023-11-29 01:34:14,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 451. [2023-11-29 01:34:14,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 295 states have (on average 1.6576271186440679) internal successors, (489), 422 states have internal predecessors, (489), 22 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-29 01:34:14,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 535 transitions. [2023-11-29 01:34:14,575 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 535 transitions. Word has length 85 [2023-11-29 01:34:14,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:34:14,576 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 535 transitions. [2023-11-29 01:34:14,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 8 states have internal predecessors, (65), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 01:34:14,576 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 535 transitions. [2023-11-29 01:34:14,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-29 01:34:14,577 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:34:14,577 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:34:14,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-11-29 01:34:14,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-29 01:34:14,778 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:34:14,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:34:14,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1472096103, now seen corresponding path program 1 times [2023-11-29 01:34:14,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:34:14,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672146217] [2023-11-29 01:34:14,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:14,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:34:14,794 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:34:14,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1088813248] [2023-11-29 01:34:14,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:14,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:34:14,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:34:14,796 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:34:14,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-29 01:34:14,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:34:14,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:34:14,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:34:14,941 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 [2023-11-29 01:34:15,031 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 01:34:15,031 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:34:15,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:34:15,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672146217] [2023-11-29 01:34:15,031 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:34:15,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088813248] [2023-11-29 01:34:15,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088813248] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:34:15,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:34:15,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:34:15,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548647442] [2023-11-29 01:34:15,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:34:15,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:34:15,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:34:15,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:34:15,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:34:15,033 INFO L87 Difference]: Start difference. First operand 451 states and 535 transitions. Second operand has 5 states, 4 states have (on average 15.5) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 01:34:15,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:34:15,197 INFO L93 Difference]: Finished difference Result 550 states and 567 transitions. [2023-11-29 01:34:15,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:34:15,197 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 15.5) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 86 [2023-11-29 01:34:15,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:34:15,200 INFO L225 Difference]: With dead ends: 550 [2023-11-29 01:34:15,200 INFO L226 Difference]: Without dead ends: 548 [2023-11-29 01:34:15,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:34:15,201 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 216 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:34:15,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 1003 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:34:15,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2023-11-29 01:34:15,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 451. [2023-11-29 01:34:15,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 295 states have (on average 1.6508474576271186) internal successors, (487), 422 states have internal predecessors, (487), 22 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-29 01:34:15,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 533 transitions. [2023-11-29 01:34:15,218 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 533 transitions. Word has length 86 [2023-11-29 01:34:15,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:34:15,219 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 533 transitions. [2023-11-29 01:34:15,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 15.5) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 01:34:15,219 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 533 transitions. [2023-11-29 01:34:15,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-29 01:34:15,220 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:34:15,220 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:34:15,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-11-29 01:34:15,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-29 01:34:15,421 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting func_to_recursive_line_29_to_41_0Err50ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:34:15,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:34:15,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1476276774, now seen corresponding path program 1 times [2023-11-29 01:34:15,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:34:15,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424848673] [2023-11-29 01:34:15,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:15,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:34:15,434 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:34:15,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1701771754] [2023-11-29 01:34:15,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:15,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:34:15,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:34:15,435 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:34:15,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-29 01:34:15,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:34:15,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 01:34:15,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:34:15,882 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 [2023-11-29 01:34:15,887 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 [2023-11-29 01:34:15,904 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 01:34:15,904 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:34:15,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:34:15,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424848673] [2023-11-29 01:34:15,905 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:34:15,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701771754] [2023-11-29 01:34:15,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701771754] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:34:15,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:34:15,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 01:34:15,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911367493] [2023-11-29 01:34:15,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:34:15,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 01:34:15,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:34:15,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 01:34:15,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:34:15,907 INFO L87 Difference]: Start difference. First operand 451 states and 533 transitions. Second operand has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 8 states have internal predecessors, (66), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 01:34:20,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:34:24,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:34:24,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:34:24,417 INFO L93 Difference]: Finished difference Result 451 states and 533 transitions. [2023-11-29 01:34:24,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 01:34:24,417 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 8 states have internal predecessors, (66), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 86 [2023-11-29 01:34:24,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:34:24,419 INFO L225 Difference]: With dead ends: 451 [2023-11-29 01:34:24,419 INFO L226 Difference]: Without dead ends: 450 [2023-11-29 01:34:24,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-11-29 01:34:24,420 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 330 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:34:24,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 1038 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 226 Invalid, 2 Unknown, 0 Unchecked, 8.4s Time] [2023-11-29 01:34:24,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2023-11-29 01:34:24,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 450. [2023-11-29 01:34:24,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 295 states have (on average 1.647457627118644) internal successors, (486), 421 states have internal predecessors, (486), 22 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-29 01:34:24,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 532 transitions. [2023-11-29 01:34:24,439 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 532 transitions. Word has length 86 [2023-11-29 01:34:24,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:34:24,439 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 532 transitions. [2023-11-29 01:34:24,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 8 states have internal predecessors, (66), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 01:34:24,439 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 532 transitions. [2023-11-29 01:34:24,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-29 01:34:24,440 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:34:24,440 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:34:24,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-11-29 01:34:24,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:34:24,641 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting func_to_recursive_line_29_to_41_0Err51ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:34:24,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:34:24,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1480060111, now seen corresponding path program 1 times [2023-11-29 01:34:24,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:34:24,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853541444] [2023-11-29 01:34:24,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:24,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:34:24,656 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:34:24,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [320617333] [2023-11-29 01:34:24,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:24,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:34:24,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:34:24,657 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:34:24,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-29 01:34:24,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:34:24,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 01:34:24,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:34:25,058 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 [2023-11-29 01:34:25,062 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 [2023-11-29 01:34:25,079 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 01:34:25,079 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:34:25,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:34:25,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853541444] [2023-11-29 01:34:25,079 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:34:25,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320617333] [2023-11-29 01:34:25,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320617333] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:34:25,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:34:25,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 01:34:25,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332403988] [2023-11-29 01:34:25,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:34:25,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 01:34:25,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:34:25,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 01:34:25,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:34:25,081 INFO L87 Difference]: Start difference. First operand 450 states and 532 transitions. Second operand has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 8 states have internal predecessors, (67), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 01:34:29,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:34:33,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:34:33,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:34:33,635 INFO L93 Difference]: Finished difference Result 450 states and 532 transitions. [2023-11-29 01:34:33,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 01:34:33,635 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 8 states have internal predecessors, (67), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 87 [2023-11-29 01:34:33,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:34:33,638 INFO L225 Difference]: With dead ends: 450 [2023-11-29 01:34:33,638 INFO L226 Difference]: Without dead ends: 449 [2023-11-29 01:34:33,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-11-29 01:34:33,639 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 283 mSDsluCounter, 1197 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 1453 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:34:33,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 1453 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 322 Invalid, 2 Unknown, 0 Unchecked, 8.4s Time] [2023-11-29 01:34:33,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2023-11-29 01:34:33,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 449. [2023-11-29 01:34:33,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 295 states have (on average 1.6440677966101696) internal successors, (485), 420 states have internal predecessors, (485), 22 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-29 01:34:33,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 531 transitions. [2023-11-29 01:34:33,660 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 531 transitions. Word has length 87 [2023-11-29 01:34:33,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:34:33,660 INFO L495 AbstractCegarLoop]: Abstraction has 449 states and 531 transitions. [2023-11-29 01:34:33,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 8 states have internal predecessors, (67), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 01:34:33,661 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 531 transitions. [2023-11-29 01:34:33,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-29 01:34:33,661 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:34:33,661 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:34:33,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-11-29 01:34:33,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:34:33,862 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting func_to_recursive_line_29_to_41_0Err52ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:34:33,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:34:33,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1362776968, now seen corresponding path program 1 times [2023-11-29 01:34:33,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:34:33,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066341282] [2023-11-29 01:34:33,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:33,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:34:33,879 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:34:33,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [368125588] [2023-11-29 01:34:33,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:33,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:34:33,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:34:33,881 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:34:33,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-29 01:34:34,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:34:34,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:34:34,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:34:34,161 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 [2023-11-29 01:34:34,170 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 01:34:34,170 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:34:34,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:34:34,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066341282] [2023-11-29 01:34:34,171 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:34:34,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368125588] [2023-11-29 01:34:34,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368125588] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:34:34,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:34:34,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:34:34,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599261799] [2023-11-29 01:34:34,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:34:34,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:34:34,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:34:34,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:34:34,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:34:34,172 INFO L87 Difference]: Start difference. First operand 449 states and 531 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 01:34:34,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:34:34,416 INFO L93 Difference]: Finished difference Result 449 states and 531 transitions. [2023-11-29 01:34:34,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:34:34,417 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 88 [2023-11-29 01:34:34,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:34:34,420 INFO L225 Difference]: With dead ends: 449 [2023-11-29 01:34:34,420 INFO L226 Difference]: Without dead ends: 448 [2023-11-29 01:34:34,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:34:34,421 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 304 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:34:34,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 1006 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:34:34,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2023-11-29 01:34:34,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 448. [2023-11-29 01:34:34,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 295 states have (on average 1.6406779661016948) internal successors, (484), 419 states have internal predecessors, (484), 22 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-29 01:34:34,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 530 transitions. [2023-11-29 01:34:34,443 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 530 transitions. Word has length 88 [2023-11-29 01:34:34,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:34:34,443 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 530 transitions. [2023-11-29 01:34:34,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 01:34:34,444 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 530 transitions. [2023-11-29 01:34:34,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-29 01:34:34,444 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:34:34,444 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:34:34,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-11-29 01:34:34,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:34:34,645 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting func_to_recursive_line_29_to_41_0Err53ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:34:34,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:34:34,645 INFO L85 PathProgramCache]: Analyzing trace with hash -703586797, now seen corresponding path program 1 times [2023-11-29 01:34:34,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:34:34,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735866129] [2023-11-29 01:34:34,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:34,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:34:34,660 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:34:34,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1212456271] [2023-11-29 01:34:34,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:34,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:34:34,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:34:34,661 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:34:34,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-29 01:34:34,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:34:34,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:34:34,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:34:34,914 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 [2023-11-29 01:34:34,924 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 01:34:34,924 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:34:34,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:34:34,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735866129] [2023-11-29 01:34:34,924 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:34:34,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212456271] [2023-11-29 01:34:34,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212456271] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:34:34,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:34:34,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:34:34,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318743048] [2023-11-29 01:34:34,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:34:34,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:34:34,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:34:34,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:34:34,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:34:34,926 INFO L87 Difference]: Start difference. First operand 448 states and 530 transitions. Second operand has 6 states, 5 states have (on average 13.8) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 01:34:39,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:34:39,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:34:39,147 INFO L93 Difference]: Finished difference Result 448 states and 530 transitions. [2023-11-29 01:34:39,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:34:39,147 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.8) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 89 [2023-11-29 01:34:39,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:34:39,149 INFO L225 Difference]: With dead ends: 448 [2023-11-29 01:34:39,149 INFO L226 Difference]: Without dead ends: 447 [2023-11-29 01:34:39,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:34:39,150 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 257 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1071 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:34:39,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 1071 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 152 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2023-11-29 01:34:39,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2023-11-29 01:34:39,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2023-11-29 01:34:39,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 295 states have (on average 1.6372881355932203) internal successors, (483), 418 states have internal predecessors, (483), 22 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-29 01:34:39,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 529 transitions. [2023-11-29 01:34:39,171 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 529 transitions. Word has length 89 [2023-11-29 01:34:39,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:34:39,172 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 529 transitions. [2023-11-29 01:34:39,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.8) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 01:34:39,172 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 529 transitions. [2023-11-29 01:34:39,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-29 01:34:39,173 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:34:39,173 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:34:39,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-11-29 01:34:39,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-11-29 01:34:39,373 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:34:39,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:34:39,374 INFO L85 PathProgramCache]: Analyzing trace with hash -158992640, now seen corresponding path program 1 times [2023-11-29 01:34:39,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:34:39,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207826275] [2023-11-29 01:34:39,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:39,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:34:39,390 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:34:39,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [368422822] [2023-11-29 01:34:39,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:39,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:34:39,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:34:39,391 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:34:39,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-29 01:34:39,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:34:39,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 01:34:39,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:34:39,560 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 [2023-11-29 01:34:39,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-11-29 01:34:39,933 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 [2023-11-29 01:34:39,947 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 01:34:39,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:34:40,207 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 01:34:40,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:34:40,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207826275] [2023-11-29 01:34:40,207 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:34:40,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368422822] [2023-11-29 01:34:40,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368422822] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:34:40,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:34:40,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-11-29 01:34:40,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66027704] [2023-11-29 01:34:40,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:34:40,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 01:34:40,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:34:40,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 01:34:40,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-11-29 01:34:40,209 INFO L87 Difference]: Start difference. First operand 447 states and 529 transitions. Second operand has 17 states, 14 states have (on average 9.857142857142858) internal successors, (138), 13 states have internal predecessors, (138), 6 states have call successors, (14), 6 states have call predecessors, (14), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-29 01:34:40,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:34:40,823 INFO L93 Difference]: Finished difference Result 657 states and 684 transitions. [2023-11-29 01:34:40,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 01:34:40,823 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 9.857142857142858) internal successors, (138), 13 states have internal predecessors, (138), 6 states have call successors, (14), 6 states have call predecessors, (14), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 93 [2023-11-29 01:34:40,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:34:40,826 INFO L225 Difference]: With dead ends: 657 [2023-11-29 01:34:40,826 INFO L226 Difference]: Without dead ends: 655 [2023-11-29 01:34:40,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 160 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2023-11-29 01:34:40,827 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 1326 mSDsluCounter, 2326 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1331 SdHoareTripleChecker+Valid, 2651 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:34:40,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1331 Valid, 2651 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:34:40,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2023-11-29 01:34:40,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 519. [2023-11-29 01:34:40,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 360 states have (on average 1.6222222222222222) internal successors, (584), 482 states have internal predecessors, (584), 28 states have call successors, (28), 7 states have call predecessors, (28), 10 states have return successors, (34), 29 states have call predecessors, (34), 28 states have call successors, (34) [2023-11-29 01:34:40,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 646 transitions. [2023-11-29 01:34:40,849 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 646 transitions. Word has length 93 [2023-11-29 01:34:40,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:34:40,849 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 646 transitions. [2023-11-29 01:34:40,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 9.857142857142858) internal successors, (138), 13 states have internal predecessors, (138), 6 states have call successors, (14), 6 states have call predecessors, (14), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-29 01:34:40,849 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 646 transitions. [2023-11-29 01:34:40,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-29 01:34:40,850 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:34:40,850 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:34:40,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-11-29 01:34:41,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-11-29 01:34:41,050 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:34:41,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:34:41,051 INFO L85 PathProgramCache]: Analyzing trace with hash -633804507, now seen corresponding path program 1 times [2023-11-29 01:34:41,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:34:41,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487719700] [2023-11-29 01:34:41,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:41,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:34:41,066 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:34:41,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1472403145] [2023-11-29 01:34:41,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:41,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:34:41,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:34:41,067 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:34:41,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-11-29 01:34:41,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:34:41,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 01:34:41,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:34:41,235 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 [2023-11-29 01:34:41,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-11-29 01:34:41,589 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 [2023-11-29 01:34:41,600 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 01:34:41,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:34:41,791 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 01:34:41,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:34:41,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487719700] [2023-11-29 01:34:41,791 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:34:41,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472403145] [2023-11-29 01:34:41,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472403145] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:34:41,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:34:41,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-11-29 01:34:41,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668351789] [2023-11-29 01:34:41,792 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:34:41,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 01:34:41,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:34:41,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 01:34:41,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-11-29 01:34:41,793 INFO L87 Difference]: Start difference. First operand 519 states and 646 transitions. Second operand has 17 states, 14 states have (on average 10.0) internal successors, (140), 13 states have internal predecessors, (140), 6 states have call successors, (14), 6 states have call predecessors, (14), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-29 01:34:42,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:34:42,367 INFO L93 Difference]: Finished difference Result 763 states and 796 transitions. [2023-11-29 01:34:42,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 01:34:42,368 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 10.0) internal successors, (140), 13 states have internal predecessors, (140), 6 states have call successors, (14), 6 states have call predecessors, (14), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 94 [2023-11-29 01:34:42,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:34:42,372 INFO L225 Difference]: With dead ends: 763 [2023-11-29 01:34:42,372 INFO L226 Difference]: Without dead ends: 761 [2023-11-29 01:34:42,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 162 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2023-11-29 01:34:42,373 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 730 mSDsluCounter, 2562 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 2834 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:34:42,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [736 Valid, 2834 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:34:42,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2023-11-29 01:34:42,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 591. [2023-11-29 01:34:42,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 424 states have (on average 1.6108490566037736) internal successors, (683), 547 states have internal predecessors, (683), 34 states have call successors, (34), 8 states have call predecessors, (34), 12 states have return successors, (42), 35 states have call predecessors, (42), 34 states have call successors, (42) [2023-11-29 01:34:42,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 759 transitions. [2023-11-29 01:34:42,398 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 759 transitions. Word has length 94 [2023-11-29 01:34:42,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:34:42,399 INFO L495 AbstractCegarLoop]: Abstraction has 591 states and 759 transitions. [2023-11-29 01:34:42,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 10.0) internal successors, (140), 13 states have internal predecessors, (140), 6 states have call successors, (14), 6 states have call predecessors, (14), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-29 01:34:42,399 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 759 transitions. [2023-11-29 01:34:42,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-29 01:34:42,400 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:34:42,400 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:34:42,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-11-29 01:34:42,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-11-29 01:34:42,600 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:34:42,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:34:42,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1981656873, now seen corresponding path program 1 times [2023-11-29 01:34:42,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:34:42,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305025761] [2023-11-29 01:34:42,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:42,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:34:42,617 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:34:42,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1527350526] [2023-11-29 01:34:42,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:42,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:34:42,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:34:42,618 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:34:42,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-11-29 01:34:42,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:34:42,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:34:42,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:34:42,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 35 [2023-11-29 01:34:42,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2023-11-29 01:34:42,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2023-11-29 01:34:44,114 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 43 treesize of output 23 [2023-11-29 01:34:44,130 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-29 01:34:44,130 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:34:44,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:34:44,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305025761] [2023-11-29 01:34:44,130 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:34:44,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527350526] [2023-11-29 01:34:44,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527350526] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:34:44,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:34:44,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:34:44,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999046343] [2023-11-29 01:34:44,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:34:44,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:34:44,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:34:44,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:34:44,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:34:44,132 INFO L87 Difference]: Start difference. First operand 591 states and 759 transitions. Second operand has 5 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-29 01:34:44,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:34:44,306 INFO L93 Difference]: Finished difference Result 591 states and 759 transitions. [2023-11-29 01:34:44,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:34:44,307 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 95 [2023-11-29 01:34:44,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:34:44,311 INFO L225 Difference]: With dead ends: 591 [2023-11-29 01:34:44,311 INFO L226 Difference]: Without dead ends: 590 [2023-11-29 01:34:44,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 88 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:34:44,312 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 238 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:34:44,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 645 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:34:44,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2023-11-29 01:34:44,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 590. [2023-11-29 01:34:44,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 424 states have (on average 1.6061320754716981) internal successors, (681), 546 states have internal predecessors, (681), 34 states have call successors, (34), 8 states have call predecessors, (34), 12 states have return successors, (42), 35 states have call predecessors, (42), 34 states have call successors, (42) [2023-11-29 01:34:44,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 757 transitions. [2023-11-29 01:34:44,345 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 757 transitions. Word has length 95 [2023-11-29 01:34:44,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:34:44,345 INFO L495 AbstractCegarLoop]: Abstraction has 590 states and 757 transitions. [2023-11-29 01:34:44,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-29 01:34:44,346 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 757 transitions. [2023-11-29 01:34:44,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-29 01:34:44,346 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:34:44,346 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:34:44,351 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-11-29 01:34:44,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-11-29 01:34:44,547 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:34:44,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:34:44,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1301821098, now seen corresponding path program 1 times [2023-11-29 01:34:44,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:34:44,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322281190] [2023-11-29 01:34:44,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:44,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:34:44,563 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:34:44,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1550581034] [2023-11-29 01:34:44,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:44,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:34:44,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:34:44,565 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:34:44,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-11-29 01:34:44,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:34:44,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 01:34:44,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:34:44,730 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 [2023-11-29 01:34:44,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 35 [2023-11-29 01:34:44,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2023-11-29 01:34:44,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2023-11-29 01:34:47,253 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:34:47,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 57 [2023-11-29 01:34:47,302 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 01:34:47,302 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:34:47,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:34:47,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322281190] [2023-11-29 01:34:47,302 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:34:47,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550581034] [2023-11-29 01:34:47,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550581034] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:34:47,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:34:47,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 01:34:47,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052596413] [2023-11-29 01:34:47,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:34:47,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 01:34:47,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:34:47,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 01:34:47,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:34:47,304 INFO L87 Difference]: Start difference. First operand 590 states and 757 transitions. Second operand has 11 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 states have internal predecessors, (70), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-29 01:34:48,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:34:48,435 INFO L93 Difference]: Finished difference Result 690 states and 792 transitions. [2023-11-29 01:34:48,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 01:34:48,436 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 states have internal predecessors, (70), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 96 [2023-11-29 01:34:48,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:34:48,440 INFO L225 Difference]: With dead ends: 690 [2023-11-29 01:34:48,440 INFO L226 Difference]: Without dead ends: 689 [2023-11-29 01:34:48,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2023-11-29 01:34:48,441 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 616 mSDsluCounter, 1523 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 1780 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 01:34:48,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [622 Valid, 1780 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 01:34:48,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2023-11-29 01:34:48,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 594. [2023-11-29 01:34:48,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 427 states have (on average 1.5995316159250585) internal successors, (683), 549 states have internal predecessors, (683), 34 states have call successors, (34), 9 states have call predecessors, (34), 13 states have return successors, (42), 35 states have call predecessors, (42), 34 states have call successors, (42) [2023-11-29 01:34:48,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 759 transitions. [2023-11-29 01:34:48,479 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 759 transitions. Word has length 96 [2023-11-29 01:34:48,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:34:48,479 INFO L495 AbstractCegarLoop]: Abstraction has 594 states and 759 transitions. [2023-11-29 01:34:48,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 states have internal predecessors, (70), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-29 01:34:48,480 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 759 transitions. [2023-11-29 01:34:48,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-29 01:34:48,480 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:34:48,480 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:34:48,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-11-29 01:34:48,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-11-29 01:34:48,681 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:34:48,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:34:48,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1701748555, now seen corresponding path program 1 times [2023-11-29 01:34:48,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:34:48,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79275889] [2023-11-29 01:34:48,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:48,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:34:48,696 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:34:48,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1111909849] [2023-11-29 01:34:48,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:48,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:34:48,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:34:48,697 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:34:48,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-11-29 01:34:48,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:34:48,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 01:34:48,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:34:48,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 35 [2023-11-29 01:34:48,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2023-11-29 01:34:48,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2023-11-29 01:34:48,920 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 [2023-11-29 01:34:48,927 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 [2023-11-29 01:34:51,707 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:34:51,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 57 [2023-11-29 01:34:51,810 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 01:34:51,810 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:34:51,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:34:51,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79275889] [2023-11-29 01:34:51,810 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:34:51,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111909849] [2023-11-29 01:34:51,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111909849] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:34:51,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:34:51,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 01:34:51,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39729023] [2023-11-29 01:34:51,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:34:51,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 01:34:51,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:34:51,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 01:34:51,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-11-29 01:34:51,812 INFO L87 Difference]: Start difference. First operand 594 states and 759 transitions. Second operand has 13 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-29 01:34:53,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:34:53,274 INFO L93 Difference]: Finished difference Result 689 states and 791 transitions. [2023-11-29 01:34:53,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 01:34:53,274 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 97 [2023-11-29 01:34:53,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:34:53,278 INFO L225 Difference]: With dead ends: 689 [2023-11-29 01:34:53,278 INFO L226 Difference]: Without dead ends: 688 [2023-11-29 01:34:53,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2023-11-29 01:34:53,279 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 619 mSDsluCounter, 2043 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 2297 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:34:53,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [625 Valid, 2297 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 01:34:53,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2023-11-29 01:34:53,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 594. [2023-11-29 01:34:53,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 427 states have (on average 1.5971896955503513) internal successors, (682), 549 states have internal predecessors, (682), 34 states have call successors, (34), 9 states have call predecessors, (34), 13 states have return successors, (42), 35 states have call predecessors, (42), 34 states have call successors, (42) [2023-11-29 01:34:53,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 758 transitions. [2023-11-29 01:34:53,336 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 758 transitions. Word has length 97 [2023-11-29 01:34:53,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:34:53,336 INFO L495 AbstractCegarLoop]: Abstraction has 594 states and 758 transitions. [2023-11-29 01:34:53,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-29 01:34:53,336 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 758 transitions. [2023-11-29 01:34:53,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-29 01:34:53,337 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:34:53,337 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:34:53,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-11-29 01:34:53,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-11-29 01:34:53,538 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:34:53,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:34:53,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1214597836, now seen corresponding path program 1 times [2023-11-29 01:34:53,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:34:53,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101829741] [2023-11-29 01:34:53,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:53,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:34:53,554 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:34:53,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1422046315] [2023-11-29 01:34:53,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:53,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:34:53,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:34:53,555 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:34:53,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-11-29 01:34:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:34:53,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 01:34:53,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:34:53,728 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 [2023-11-29 01:34:53,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 35 [2023-11-29 01:34:53,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2023-11-29 01:34:53,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2023-11-29 01:34:53,757 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 [2023-11-29 01:34:56,447 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:34:56,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 57 [2023-11-29 01:34:56,546 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 01:34:56,546 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:34:56,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:34:56,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101829741] [2023-11-29 01:34:56,546 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:34:56,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422046315] [2023-11-29 01:34:56,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422046315] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:34:56,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:34:56,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 01:34:56,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651576043] [2023-11-29 01:34:56,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:34:56,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 01:34:56,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:34:56,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 01:34:56,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-11-29 01:34:56,548 INFO L87 Difference]: Start difference. First operand 594 states and 758 transitions. Second operand has 13 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-29 01:34:58,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:34:58,101 INFO L93 Difference]: Finished difference Result 688 states and 790 transitions. [2023-11-29 01:34:58,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 01:34:58,102 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 98 [2023-11-29 01:34:58,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:34:58,104 INFO L225 Difference]: With dead ends: 688 [2023-11-29 01:34:58,104 INFO L226 Difference]: Without dead ends: 687 [2023-11-29 01:34:58,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2023-11-29 01:34:58,104 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 953 mSDsluCounter, 2035 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 959 SdHoareTripleChecker+Valid, 2290 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:34:58,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [959 Valid, 2290 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 01:34:58,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2023-11-29 01:34:58,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 594. [2023-11-29 01:34:58,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 427 states have (on average 1.594847775175644) internal successors, (681), 549 states have internal predecessors, (681), 34 states have call successors, (34), 9 states have call predecessors, (34), 13 states have return successors, (42), 35 states have call predecessors, (42), 34 states have call successors, (42) [2023-11-29 01:34:58,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 757 transitions. [2023-11-29 01:34:58,148 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 757 transitions. Word has length 98 [2023-11-29 01:34:58,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:34:58,148 INFO L495 AbstractCegarLoop]: Abstraction has 594 states and 757 transitions. [2023-11-29 01:34:58,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-29 01:34:58,148 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 757 transitions. [2023-11-29 01:34:58,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-29 01:34:58,149 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:34:58,149 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:34:58,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-11-29 01:34:58,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-11-29 01:34:58,349 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:34:58,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:34:58,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1002172563, now seen corresponding path program 1 times [2023-11-29 01:34:58,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:34:58,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912290869] [2023-11-29 01:34:58,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:58,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:34:58,365 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:34:58,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [961011055] [2023-11-29 01:34:58,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:58,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:34:58,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:34:58,366 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:34:58,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-11-29 01:34:58,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:34:58,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 01:34:58,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:34:58,550 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 [2023-11-29 01:34:58,552 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 [2023-11-29 01:34:58,795 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 [2023-11-29 01:34:58,807 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 01:34:58,808 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:34:58,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:34:58,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912290869] [2023-11-29 01:34:58,808 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:34:58,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961011055] [2023-11-29 01:34:58,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961011055] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:34:58,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:34:58,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:34:58,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277163414] [2023-11-29 01:34:58,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:34:58,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:34:58,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:34:58,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:34:58,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:34:58,810 INFO L87 Difference]: Start difference. First operand 594 states and 757 transitions. Second operand has 6 states, 5 states have (on average 14.6) internal successors, (73), 6 states have internal predecessors, (73), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-29 01:34:59,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:34:59,280 INFO L93 Difference]: Finished difference Result 687 states and 789 transitions. [2023-11-29 01:34:59,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:34:59,281 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.6) internal successors, (73), 6 states have internal predecessors, (73), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 99 [2023-11-29 01:34:59,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:34:59,284 INFO L225 Difference]: With dead ends: 687 [2023-11-29 01:34:59,284 INFO L226 Difference]: Without dead ends: 686 [2023-11-29 01:34:59,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:34:59,285 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 435 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 958 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:34:59,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 958 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 206 Invalid, 1 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:34:59,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2023-11-29 01:34:59,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 594. [2023-11-29 01:34:59,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 427 states have (on average 1.5925058548009368) internal successors, (680), 549 states have internal predecessors, (680), 34 states have call successors, (34), 9 states have call predecessors, (34), 13 states have return successors, (42), 35 states have call predecessors, (42), 34 states have call successors, (42) [2023-11-29 01:34:59,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 756 transitions. [2023-11-29 01:34:59,332 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 756 transitions. Word has length 99 [2023-11-29 01:34:59,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:34:59,332 INFO L495 AbstractCegarLoop]: Abstraction has 594 states and 756 transitions. [2023-11-29 01:34:59,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.6) internal successors, (73), 6 states have internal predecessors, (73), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-29 01:34:59,332 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 756 transitions. [2023-11-29 01:34:59,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-29 01:34:59,333 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:34:59,333 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:34:59,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-11-29 01:34:59,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:34:59,534 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:34:59,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:34:59,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1002578194, now seen corresponding path program 1 times [2023-11-29 01:34:59,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:34:59,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062986194] [2023-11-29 01:34:59,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:59,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:34:59,548 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:34:59,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1647260] [2023-11-29 01:34:59,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:59,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:34:59,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:34:59,549 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:34:59,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-11-29 01:34:59,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:34:59,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 01:34:59,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:34:59,740 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 [2023-11-29 01:34:59,745 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 [2023-11-29 01:35:00,073 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 [2023-11-29 01:35:00,090 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 01:35:00,091 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:35:00,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:35:00,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062986194] [2023-11-29 01:35:00,091 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:35:00,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647260] [2023-11-29 01:35:00,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647260] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:35:00,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:35:00,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:35:00,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580344865] [2023-11-29 01:35:00,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:35:00,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:35:00,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:35:00,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:35:00,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:35:00,093 INFO L87 Difference]: Start difference. First operand 594 states and 756 transitions. Second operand has 6 states, 5 states have (on average 14.8) internal successors, (74), 6 states have internal predecessors, (74), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-29 01:35:00,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:35:00,526 INFO L93 Difference]: Finished difference Result 686 states and 788 transitions. [2023-11-29 01:35:00,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:35:00,527 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.8) internal successors, (74), 6 states have internal predecessors, (74), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 100 [2023-11-29 01:35:00,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:35:00,530 INFO L225 Difference]: With dead ends: 686 [2023-11-29 01:35:00,530 INFO L226 Difference]: Without dead ends: 685 [2023-11-29 01:35:00,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:35:00,531 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 277 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:35:00,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 1157 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:35:00,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2023-11-29 01:35:00,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 594. [2023-11-29 01:35:00,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 427 states have (on average 1.5901639344262295) internal successors, (679), 549 states have internal predecessors, (679), 34 states have call successors, (34), 9 states have call predecessors, (34), 13 states have return successors, (42), 35 states have call predecessors, (42), 34 states have call successors, (42) [2023-11-29 01:35:00,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 755 transitions. [2023-11-29 01:35:00,581 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 755 transitions. Word has length 100 [2023-11-29 01:35:00,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:35:00,582 INFO L495 AbstractCegarLoop]: Abstraction has 594 states and 755 transitions. [2023-11-29 01:35:00,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.8) internal successors, (74), 6 states have internal predecessors, (74), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-29 01:35:00,582 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 755 transitions. [2023-11-29 01:35:00,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-29 01:35:00,582 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:35:00,582 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:35:00,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-11-29 01:35:00,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-11-29 01:35:00,783 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:35:00,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:35:00,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1015152753, now seen corresponding path program 1 times [2023-11-29 01:35:00,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:35:00,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476479335] [2023-11-29 01:35:00,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:00,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:35:00,795 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:35:00,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1829185769] [2023-11-29 01:35:00,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:00,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:35:00,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:35:00,796 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:35:00,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-11-29 01:35:00,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:35:00,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 01:35:00,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:35:00,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 35 [2023-11-29 01:35:00,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2023-11-29 01:35:00,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2023-11-29 01:35:00,993 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 [2023-11-29 01:35:01,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:35:03,606 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:35:03,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 57 [2023-11-29 01:35:03,719 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 01:35:03,719 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:35:03,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:35:03,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476479335] [2023-11-29 01:35:03,720 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:35:03,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829185769] [2023-11-29 01:35:03,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829185769] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:35:03,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:35:03,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-29 01:35:03,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948753780] [2023-11-29 01:35:03,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:35:03,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 01:35:03,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:35:03,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 01:35:03,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-11-29 01:35:03,722 INFO L87 Difference]: Start difference. First operand 594 states and 755 transitions. Second operand has 14 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-29 01:35:05,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:35:05,179 INFO L93 Difference]: Finished difference Result 685 states and 787 transitions. [2023-11-29 01:35:05,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 01:35:05,180 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 101 [2023-11-29 01:35:05,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:35:05,182 INFO L225 Difference]: With dead ends: 685 [2023-11-29 01:35:05,182 INFO L226 Difference]: Without dead ends: 684 [2023-11-29 01:35:05,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2023-11-29 01:35:05,183 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 674 mSDsluCounter, 2133 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 2387 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:35:05,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [680 Valid, 2387 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 01:35:05,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2023-11-29 01:35:05,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 594. [2023-11-29 01:35:05,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 427 states have (on average 1.5878220140515222) internal successors, (678), 549 states have internal predecessors, (678), 34 states have call successors, (34), 9 states have call predecessors, (34), 13 states have return successors, (42), 35 states have call predecessors, (42), 34 states have call successors, (42) [2023-11-29 01:35:05,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 754 transitions. [2023-11-29 01:35:05,232 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 754 transitions. Word has length 101 [2023-11-29 01:35:05,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:35:05,232 INFO L495 AbstractCegarLoop]: Abstraction has 594 states and 754 transitions. [2023-11-29 01:35:05,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-29 01:35:05,232 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 754 transitions. [2023-11-29 01:35:05,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-29 01:35:05,233 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:35:05,233 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:35:05,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-11-29 01:35:05,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-11-29 01:35:05,433 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:35:05,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:35:05,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1404964080, now seen corresponding path program 1 times [2023-11-29 01:35:05,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:35:05,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96762089] [2023-11-29 01:35:05,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:05,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:35:05,448 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:35:05,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1918010354] [2023-11-29 01:35:05,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:05,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:35:05,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:35:05,449 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:35:05,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-11-29 01:35:05,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:35:05,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 01:35:05,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:35:05,633 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 [2023-11-29 01:35:05,636 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 [2023-11-29 01:35:05,896 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 [2023-11-29 01:35:05,928 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 01:35:05,929 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:35:05,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:35:05,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96762089] [2023-11-29 01:35:05,929 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:35:05,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918010354] [2023-11-29 01:35:05,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918010354] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:35:05,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:35:05,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:35:05,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746910725] [2023-11-29 01:35:05,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:35:05,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:35:05,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:35:05,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:35:05,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:35:05,930 INFO L87 Difference]: Start difference. First operand 594 states and 754 transitions. Second operand has 6 states, 5 states have (on average 15.2) internal successors, (76), 6 states have internal predecessors, (76), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-29 01:35:06,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:35:06,520 INFO L93 Difference]: Finished difference Result 684 states and 786 transitions. [2023-11-29 01:35:06,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:35:06,521 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 15.2) internal successors, (76), 6 states have internal predecessors, (76), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2023-11-29 01:35:06,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:35:06,522 INFO L225 Difference]: With dead ends: 684 [2023-11-29 01:35:06,522 INFO L226 Difference]: Without dead ends: 683 [2023-11-29 01:35:06,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:35:06,523 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 271 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 1155 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:35:06,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 1155 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 01:35:06,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2023-11-29 01:35:06,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 594. [2023-11-29 01:35:06,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 427 states have (on average 1.585480093676815) internal successors, (677), 549 states have internal predecessors, (677), 34 states have call successors, (34), 9 states have call predecessors, (34), 13 states have return successors, (42), 35 states have call predecessors, (42), 34 states have call successors, (42) [2023-11-29 01:35:06,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 753 transitions. [2023-11-29 01:35:06,574 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 753 transitions. Word has length 102 [2023-11-29 01:35:06,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:35:06,575 INFO L495 AbstractCegarLoop]: Abstraction has 594 states and 753 transitions. [2023-11-29 01:35:06,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 15.2) internal successors, (76), 6 states have internal predecessors, (76), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-29 01:35:06,575 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 753 transitions. [2023-11-29 01:35:06,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-29 01:35:06,575 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:35:06,576 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:35:06,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-11-29 01:35:06,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-11-29 01:35:06,776 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting func_to_recursive_line_29_to_41_0Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:35:06,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:35:06,776 INFO L85 PathProgramCache]: Analyzing trace with hash -2056625905, now seen corresponding path program 1 times [2023-11-29 01:35:06,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:35:06,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770128204] [2023-11-29 01:35:06,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:06,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:35:06,790 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:35:06,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549112809] [2023-11-29 01:35:06,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:06,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:35:06,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:35:06,791 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:35:06,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-11-29 01:35:06,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:35:06,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:35:06,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:35:07,019 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 [2023-11-29 01:35:07,027 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-29 01:35:07,027 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:35:07,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:35:07,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770128204] [2023-11-29 01:35:07,028 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:35:07,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549112809] [2023-11-29 01:35:07,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549112809] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:35:07,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:35:07,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:35:07,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492195935] [2023-11-29 01:35:07,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:35:07,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:35:07,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:35:07,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:35:07,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:35:07,029 INFO L87 Difference]: Start difference. First operand 594 states and 753 transitions. Second operand has 6 states, 5 states have (on average 15.2) internal successors, (76), 6 states have internal predecessors, (76), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 01:35:11,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:35:11,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:35:11,273 INFO L93 Difference]: Finished difference Result 594 states and 753 transitions. [2023-11-29 01:35:11,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:35:11,274 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 15.2) internal successors, (76), 6 states have internal predecessors, (76), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 103 [2023-11-29 01:35:11,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:35:11,275 INFO L225 Difference]: With dead ends: 594 [2023-11-29 01:35:11,275 INFO L226 Difference]: Without dead ends: 593 [2023-11-29 01:35:11,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:35:11,276 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 298 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:35:11,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 967 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2023-11-29 01:35:11,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2023-11-29 01:35:11,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 593. [2023-11-29 01:35:11,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 427 states have (on average 1.5784543325526932) internal successors, (674), 548 states have internal predecessors, (674), 34 states have call successors, (34), 9 states have call predecessors, (34), 13 states have return successors, (42), 35 states have call predecessors, (42), 34 states have call successors, (42) [2023-11-29 01:35:11,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 750 transitions. [2023-11-29 01:35:11,325 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 750 transitions. Word has length 103 [2023-11-29 01:35:11,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:35:11,325 INFO L495 AbstractCegarLoop]: Abstraction has 593 states and 750 transitions. [2023-11-29 01:35:11,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 15.2) internal successors, (76), 6 states have internal predecessors, (76), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 01:35:11,325 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 750 transitions. [2023-11-29 01:35:11,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-29 01:35:11,325 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:35:11,326 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:35:11,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-11-29 01:35:11,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:35:11,526 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:35:11,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:35:11,526 INFO L85 PathProgramCache]: Analyzing trace with hash -604213327, now seen corresponding path program 1 times [2023-11-29 01:35:11,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:35:11,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779478345] [2023-11-29 01:35:11,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:11,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:35:11,538 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:35:11,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2018416077] [2023-11-29 01:35:11,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:11,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:35:11,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:35:11,539 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:35:11,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-11-29 01:35:11,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:35:11,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:35:11,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:35:11,704 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 [2023-11-29 01:35:11,824 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 01:35:11,824 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:35:11,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:35:11,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779478345] [2023-11-29 01:35:11,824 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:35:11,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018416077] [2023-11-29 01:35:11,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018416077] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:35:11,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:35:11,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:35:11,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887382570] [2023-11-29 01:35:11,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:35:11,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:35:11,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:35:11,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:35:11,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:35:11,825 INFO L87 Difference]: Start difference. First operand 593 states and 750 transitions. Second operand has 6 states, 5 states have (on average 15.4) internal successors, (77), 6 states have internal predecessors, (77), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-29 01:35:12,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:35:12,092 INFO L93 Difference]: Finished difference Result 682 states and 782 transitions. [2023-11-29 01:35:12,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:35:12,092 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 15.4) internal successors, (77), 6 states have internal predecessors, (77), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 103 [2023-11-29 01:35:12,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:35:12,094 INFO L225 Difference]: With dead ends: 682 [2023-11-29 01:35:12,094 INFO L226 Difference]: Without dead ends: 681 [2023-11-29 01:35:12,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:35:12,095 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 410 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:35:12,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 1023 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:35:12,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2023-11-29 01:35:12,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 593. [2023-11-29 01:35:12,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 427 states have (on average 1.576112412177986) internal successors, (673), 548 states have internal predecessors, (673), 34 states have call successors, (34), 9 states have call predecessors, (34), 13 states have return successors, (42), 35 states have call predecessors, (42), 34 states have call successors, (42) [2023-11-29 01:35:12,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 749 transitions. [2023-11-29 01:35:12,152 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 749 transitions. Word has length 103 [2023-11-29 01:35:12,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:35:12,152 INFO L495 AbstractCegarLoop]: Abstraction has 593 states and 749 transitions. [2023-11-29 01:35:12,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 15.4) internal successors, (77), 6 states have internal predecessors, (77), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-29 01:35:12,153 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 749 transitions. [2023-11-29 01:35:12,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-29 01:35:12,153 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:35:12,154 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:35:12,158 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2023-11-29 01:35:12,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:35:12,354 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting func_to_recursive_line_29_to_41_0Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:35:12,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:35:12,354 INFO L85 PathProgramCache]: Analyzing trace with hash 669106432, now seen corresponding path program 1 times [2023-11-29 01:35:12,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:35:12,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574840378] [2023-11-29 01:35:12,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:12,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:35:12,371 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:35:12,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1793629892] [2023-11-29 01:35:12,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:12,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:35:12,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:35:12,372 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:35:12,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-11-29 01:35:12,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:35:12,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:35:12,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:35:12,603 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 [2023-11-29 01:35:12,612 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-29 01:35:12,612 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:35:12,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:35:12,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574840378] [2023-11-29 01:35:12,613 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:35:12,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793629892] [2023-11-29 01:35:12,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793629892] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:35:12,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:35:12,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:35:12,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645933354] [2023-11-29 01:35:12,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:35:12,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:35:12,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:35:12,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:35:12,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:35:12,614 INFO L87 Difference]: Start difference. First operand 593 states and 749 transitions. Second operand has 6 states, 5 states have (on average 15.4) internal successors, (77), 6 states have internal predecessors, (77), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 01:35:16,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:35:16,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:35:16,862 INFO L93 Difference]: Finished difference Result 593 states and 749 transitions. [2023-11-29 01:35:16,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:35:16,862 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 15.4) internal successors, (77), 6 states have internal predecessors, (77), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 104 [2023-11-29 01:35:16,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:35:16,869 INFO L225 Difference]: With dead ends: 593 [2023-11-29 01:35:16,869 INFO L226 Difference]: Without dead ends: 592 [2023-11-29 01:35:16,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:35:16,869 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 381 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:35:16,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 960 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 127 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2023-11-29 01:35:16,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2023-11-29 01:35:16,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 592. [2023-11-29 01:35:16,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 427 states have (on average 1.5690866510538641) internal successors, (670), 547 states have internal predecessors, (670), 34 states have call successors, (34), 9 states have call predecessors, (34), 13 states have return successors, (42), 35 states have call predecessors, (42), 34 states have call successors, (42) [2023-11-29 01:35:16,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 746 transitions. [2023-11-29 01:35:16,917 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 746 transitions. Word has length 104 [2023-11-29 01:35:16,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:35:16,917 INFO L495 AbstractCegarLoop]: Abstraction has 592 states and 746 transitions. [2023-11-29 01:35:16,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 15.4) internal successors, (77), 6 states have internal predecessors, (77), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 01:35:16,917 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 746 transitions. [2023-11-29 01:35:16,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-29 01:35:16,918 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:35:16,918 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:35:16,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2023-11-29 01:35:17,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:35:17,119 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:35:17,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:35:17,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1550743758, now seen corresponding path program 1 times [2023-11-29 01:35:17,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:35:17,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087156053] [2023-11-29 01:35:17,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:17,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:35:17,135 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:35:17,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1725602627] [2023-11-29 01:35:17,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:17,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:35:17,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:35:17,137 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:35:17,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-11-29 01:35:17,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:35:17,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:35:17,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:35:17,318 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 [2023-11-29 01:35:17,458 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 01:35:17,459 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:35:17,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:35:17,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087156053] [2023-11-29 01:35:17,459 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:35:17,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725602627] [2023-11-29 01:35:17,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725602627] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:35:17,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:35:17,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:35:17,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435393526] [2023-11-29 01:35:17,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:35:17,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:35:17,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:35:17,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:35:17,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:35:17,460 INFO L87 Difference]: Start difference. First operand 592 states and 746 transitions. Second operand has 6 states, 5 states have (on average 15.6) internal successors, (78), 6 states have internal predecessors, (78), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-29 01:35:17,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:35:17,753 INFO L93 Difference]: Finished difference Result 680 states and 778 transitions. [2023-11-29 01:35:17,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:35:17,753 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 15.6) internal successors, (78), 6 states have internal predecessors, (78), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 104 [2023-11-29 01:35:17,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:35:17,754 INFO L225 Difference]: With dead ends: 680 [2023-11-29 01:35:17,755 INFO L226 Difference]: Without dead ends: 679 [2023-11-29 01:35:17,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:35:17,755 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 259 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 1228 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:35:17,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 1228 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:35:17,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2023-11-29 01:35:17,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 592. [2023-11-29 01:35:17,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 427 states have (on average 1.5667447306791569) internal successors, (669), 547 states have internal predecessors, (669), 34 states have call successors, (34), 9 states have call predecessors, (34), 13 states have return successors, (42), 35 states have call predecessors, (42), 34 states have call successors, (42) [2023-11-29 01:35:17,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 745 transitions. [2023-11-29 01:35:17,809 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 745 transitions. Word has length 104 [2023-11-29 01:35:17,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:35:17,810 INFO L495 AbstractCegarLoop]: Abstraction has 592 states and 745 transitions. [2023-11-29 01:35:17,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 15.6) internal successors, (78), 6 states have internal predecessors, (78), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-29 01:35:17,810 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 745 transitions. [2023-11-29 01:35:17,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-29 01:35:17,810 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:35:17,811 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:35:17,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2023-11-29 01:35:18,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:35:18,011 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:35:18,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:35:18,012 INFO L85 PathProgramCache]: Analyzing trace with hash -828416045, now seen corresponding path program 1 times [2023-11-29 01:35:18,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:35:18,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385451134] [2023-11-29 01:35:18,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:18,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:35:18,026 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:35:18,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2061406658] [2023-11-29 01:35:18,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:18,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:35:18,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:35:18,028 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:35:18,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-11-29 01:35:18,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:35:18,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 01:35:18,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:35:18,216 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 [2023-11-29 01:35:18,371 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 01:35:18,371 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:35:18,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:35:18,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385451134] [2023-11-29 01:35:18,371 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:35:18,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061406658] [2023-11-29 01:35:18,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061406658] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:35:18,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:35:18,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 01:35:18,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862822482] [2023-11-29 01:35:18,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:35:18,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:35:18,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:35:18,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:35:18,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:35:18,373 INFO L87 Difference]: Start difference. First operand 592 states and 745 transitions. Second operand has 7 states, 6 states have (on average 13.166666666666666) internal successors, (79), 7 states have internal predecessors, (79), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-29 01:35:18,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:35:18,917 INFO L93 Difference]: Finished difference Result 679 states and 777 transitions. [2023-11-29 01:35:18,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:35:18,917 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.166666666666666) internal successors, (79), 7 states have internal predecessors, (79), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 105 [2023-11-29 01:35:18,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:35:18,918 INFO L225 Difference]: With dead ends: 679 [2023-11-29 01:35:18,918 INFO L226 Difference]: Without dead ends: 678 [2023-11-29 01:35:18,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:35:18,919 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 395 mSDsluCounter, 986 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 1255 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:35:18,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 1255 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:35:18,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2023-11-29 01:35:18,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 592. [2023-11-29 01:35:18,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 427 states have (on average 1.5644028103044496) internal successors, (668), 547 states have internal predecessors, (668), 34 states have call successors, (34), 9 states have call predecessors, (34), 13 states have return successors, (42), 35 states have call predecessors, (42), 34 states have call successors, (42) [2023-11-29 01:35:18,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 744 transitions. [2023-11-29 01:35:18,975 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 744 transitions. Word has length 105 [2023-11-29 01:35:18,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:35:18,975 INFO L495 AbstractCegarLoop]: Abstraction has 592 states and 744 transitions. [2023-11-29 01:35:18,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.166666666666666) internal successors, (79), 7 states have internal predecessors, (79), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-29 01:35:18,975 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 744 transitions. [2023-11-29 01:35:18,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-29 01:35:18,976 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:35:18,976 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:35:18,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2023-11-29 01:35:19,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-11-29 01:35:19,177 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting func_to_recursive_line_29_to_41_0Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:35:19,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:35:19,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1233811678, now seen corresponding path program 1 times [2023-11-29 01:35:19,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:35:19,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422181797] [2023-11-29 01:35:19,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:19,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:35:19,193 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:35:19,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1887353609] [2023-11-29 01:35:19,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:19,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:35:19,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:35:19,194 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:35:19,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-11-29 01:35:19,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:35:19,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 01:35:19,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:35:19,396 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 [2023-11-29 01:35:19,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:35:19,895 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 01:35:19,895 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:35:24,183 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 30 treesize of output 18 [2023-11-29 01:35:28,474 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 01:35:28,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:35:28,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422181797] [2023-11-29 01:35:28,475 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:35:28,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887353609] [2023-11-29 01:35:28,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887353609] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:35:28,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:35:28,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2023-11-29 01:35:28,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039641572] [2023-11-29 01:35:28,475 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:35:28,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 01:35:28,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:35:28,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 01:35:28,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2023-11-29 01:35:28,477 INFO L87 Difference]: Start difference. First operand 592 states and 744 transitions. Second operand has 27 states, 24 states have (on average 6.666666666666667) internal successors, (160), 21 states have internal predecessors, (160), 8 states have call successors, (16), 6 states have call predecessors, (16), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-29 01:35:30,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 01:35:41,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 01:35:45,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 01:35:51,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 01:35:56,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 01:36:01,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 01:36:05,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 01:36:10,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 01:36:18,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 01:36:22,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 01:36:26,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 01:36:30,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 01:36:35,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:36:35,792 INFO L93 Difference]: Finished difference Result 752 states and 784 transitions. [2023-11-29 01:36:35,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-29 01:36:35,792 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 6.666666666666667) internal successors, (160), 21 states have internal predecessors, (160), 8 states have call successors, (16), 6 states have call predecessors, (16), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 106 [2023-11-29 01:36:35,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:36:35,794 INFO L225 Difference]: With dead ends: 752 [2023-11-29 01:36:35,794 INFO L226 Difference]: Without dead ends: 751 [2023-11-29 01:36:35,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 176 SyntacticMatches, 9 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=357, Invalid=1995, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 01:36:35,794 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 1698 mSDsluCounter, 4439 mSDsCounter, 0 mSdLazyCounter, 1651 mSolverCounterSat, 94 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1704 SdHoareTripleChecker+Valid, 4723 SdHoareTripleChecker+Invalid, 1750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1651 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 59.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:36:35,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1704 Valid, 4723 Invalid, 1750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1651 Invalid, 5 Unknown, 0 Unchecked, 59.5s Time] [2023-11-29 01:36:35,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2023-11-29 01:36:35,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 592. [2023-11-29 01:36:35,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 427 states have (on average 1.559718969555035) internal successors, (666), 547 states have internal predecessors, (666), 34 states have call successors, (34), 9 states have call predecessors, (34), 13 states have return successors, (42), 35 states have call predecessors, (42), 34 states have call successors, (42) [2023-11-29 01:36:35,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 742 transitions. [2023-11-29 01:36:35,848 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 742 transitions. Word has length 106 [2023-11-29 01:36:35,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:36:35,848 INFO L495 AbstractCegarLoop]: Abstraction has 592 states and 742 transitions. [2023-11-29 01:36:35,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 6.666666666666667) internal successors, (160), 21 states have internal predecessors, (160), 8 states have call successors, (16), 6 states have call predecessors, (16), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-29 01:36:35,848 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 742 transitions. [2023-11-29 01:36:35,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-29 01:36:35,849 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:36:35,849 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:36:35,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2023-11-29 01:36:36,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-11-29 01:36:36,049 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:36:36,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:36:36,050 INFO L85 PathProgramCache]: Analyzing trace with hash 88906580, now seen corresponding path program 1 times [2023-11-29 01:36:36,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:36:36,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273676412] [2023-11-29 01:36:36,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:36,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:36:36,065 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:36:36,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [622592159] [2023-11-29 01:36:36,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:36,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:36:36,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:36:36,067 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:36:36,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-11-29 01:36:36,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:36:36,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 01:36:36,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:36:36,250 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 11 treesize of output 7 [2023-11-29 01:36:36,385 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 01:36:36,385 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:36:36,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:36:36,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273676412] [2023-11-29 01:36:36,386 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:36:36,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622592159] [2023-11-29 01:36:36,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622592159] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:36:36,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:36:36,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:36:36,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346236853] [2023-11-29 01:36:36,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:36:36,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:36:36,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:36:36,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:36:36,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:36:36,387 INFO L87 Difference]: Start difference. First operand 592 states and 742 transitions. Second operand has 6 states, 5 states have (on average 16.0) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-29 01:36:36,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:36:36,865 INFO L93 Difference]: Finished difference Result 678 states and 774 transitions. [2023-11-29 01:36:36,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:36:36,865 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.0) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 106 [2023-11-29 01:36:36,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:36:36,867 INFO L225 Difference]: With dead ends: 678 [2023-11-29 01:36:36,867 INFO L226 Difference]: Without dead ends: 677 [2023-11-29 01:36:36,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:36:36,867 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 397 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:36:36,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 1013 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:36:36,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2023-11-29 01:36:36,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 592. [2023-11-29 01:36:36,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 427 states have (on average 1.5573770491803278) internal successors, (665), 547 states have internal predecessors, (665), 34 states have call successors, (34), 9 states have call predecessors, (34), 13 states have return successors, (42), 35 states have call predecessors, (42), 34 states have call successors, (42) [2023-11-29 01:36:36,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 741 transitions. [2023-11-29 01:36:36,918 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 741 transitions. Word has length 106 [2023-11-29 01:36:36,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:36:36,918 INFO L495 AbstractCegarLoop]: Abstraction has 592 states and 741 transitions. [2023-11-29 01:36:36,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.0) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-29 01:36:36,919 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 741 transitions. [2023-11-29 01:36:36,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-29 01:36:36,919 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:36:36,919 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:36:36,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2023-11-29 01:36:37,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2023-11-29 01:36:37,120 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting func_to_recursive_line_29_to_41_0Err10ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:36:37,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:36:37,120 INFO L85 PathProgramCache]: Analyzing trace with hash -153527435, now seen corresponding path program 1 times [2023-11-29 01:36:37,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:36:37,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858038411] [2023-11-29 01:36:37,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:37,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:36:37,136 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:36:37,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [961511259] [2023-11-29 01:36:37,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:37,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:36:37,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:36:37,137 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:36:37,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-11-29 01:36:37,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:36:37,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 01:36:37,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:36:37,356 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 [2023-11-29 01:36:37,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:36:37,832 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 [2023-11-29 01:36:37,936 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 [2023-11-29 01:36:37,962 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 01:36:37,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:36:38,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:36:38,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858038411] [2023-11-29 01:36:38,312 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:36:38,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961511259] [2023-11-29 01:36:38,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961511259] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:36:38,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:36:38,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-11-29 01:36:38,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016814959] [2023-11-29 01:36:38,312 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:36:38,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 01:36:38,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:36:38,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 01:36:38,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2023-11-29 01:36:38,313 INFO L87 Difference]: Start difference. First operand 592 states and 741 transitions. Second operand has 15 states, 13 states have (on average 6.384615384615385) internal successors, (83), 12 states have internal predecessors, (83), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 01:36:39,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:36:39,828 INFO L93 Difference]: Finished difference Result 677 states and 773 transitions. [2023-11-29 01:36:39,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 01:36:39,829 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 6.384615384615385) internal successors, (83), 12 states have internal predecessors, (83), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 109 [2023-11-29 01:36:39,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:36:39,830 INFO L225 Difference]: With dead ends: 677 [2023-11-29 01:36:39,830 INFO L226 Difference]: Without dead ends: 675 [2023-11-29 01:36:39,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 91 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2023-11-29 01:36:39,831 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 942 mSDsluCounter, 2472 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 952 SdHoareTripleChecker+Valid, 2773 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:36:39,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [952 Valid, 2773 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 01:36:39,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2023-11-29 01:36:39,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 590. [2023-11-29 01:36:39,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 427 states have (on average 1.5433255269320842) internal successors, (659), 545 states have internal predecessors, (659), 34 states have call successors, (34), 9 states have call predecessors, (34), 13 states have return successors, (42), 35 states have call predecessors, (42), 34 states have call successors, (42) [2023-11-29 01:36:39,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 735 transitions. [2023-11-29 01:36:39,882 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 735 transitions. Word has length 109 [2023-11-29 01:36:39,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:36:39,883 INFO L495 AbstractCegarLoop]: Abstraction has 590 states and 735 transitions. [2023-11-29 01:36:39,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 6.384615384615385) internal successors, (83), 12 states have internal predecessors, (83), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 01:36:39,883 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 735 transitions. [2023-11-29 01:36:39,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-29 01:36:39,883 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:36:39,883 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:36:39,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2023-11-29 01:36:40,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:36:40,084 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting func_to_recursive_line_29_to_41_0Err11ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:36:40,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:36:40,084 INFO L85 PathProgramCache]: Analyzing trace with hash -464383130, now seen corresponding path program 1 times [2023-11-29 01:36:40,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:36:40,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965272483] [2023-11-29 01:36:40,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:40,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:36:40,099 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:36:40,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1514756602] [2023-11-29 01:36:40,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:40,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:36:40,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:36:40,101 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:36:40,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-11-29 01:36:40,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:36:40,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 01:36:40,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:36:40,310 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 [2023-11-29 01:36:40,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:36:40,824 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 01:36:40,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:36:41,254 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-29 01:36:41,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:36:41,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965272483] [2023-11-29 01:36:41,254 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:36:41,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514756602] [2023-11-29 01:36:41,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514756602] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:36:41,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:36:41,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 21 [2023-11-29 01:36:41,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157390642] [2023-11-29 01:36:41,255 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:36:41,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 01:36:41,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:36:41,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 01:36:41,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2023-11-29 01:36:41,257 INFO L87 Difference]: Start difference. First operand 590 states and 735 transitions. Second operand has 22 states, 19 states have (on average 8.68421052631579) internal successors, (165), 18 states have internal predecessors, (165), 6 states have call successors, (16), 7 states have call predecessors, (16), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-29 01:36:42,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 01:36:51,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 01:36:55,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 01:37:06,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 01:37:10,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 01:37:14,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 01:37:18,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 01:37:22,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 01:37:26,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 01:37:30,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 01:37:34,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 01:37:34,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:37:34,363 INFO L93 Difference]: Finished difference Result 925 states and 960 transitions. [2023-11-29 01:37:34,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 01:37:34,364 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 8.68421052631579) internal successors, (165), 18 states have internal predecessors, (165), 6 states have call successors, (16), 7 states have call predecessors, (16), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 110 [2023-11-29 01:37:34,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:37:34,365 INFO L225 Difference]: With dead ends: 925 [2023-11-29 01:37:34,365 INFO L226 Difference]: Without dead ends: 923 [2023-11-29 01:37:34,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 188 SyntacticMatches, 10 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=253, Invalid=1005, Unknown=2, NotChecked=0, Total=1260 [2023-11-29 01:37:34,366 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 1032 mSDsluCounter, 5251 mSDsCounter, 0 mSdLazyCounter, 954 mSolverCounterSat, 66 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1038 SdHoareTripleChecker+Valid, 5728 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 954 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:37:34,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1038 Valid, 5728 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 954 Invalid, 10 Unknown, 0 Unchecked, 42.4s Time] [2023-11-29 01:37:34,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2023-11-29 01:37:34,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 679. [2023-11-29 01:37:34,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 509 states have (on average 1.5776031434184676) internal successors, (803), 626 states have internal predecessors, (803), 39 states have call successors, (39), 12 states have call predecessors, (39), 16 states have return successors, (47), 40 states have call predecessors, (47), 39 states have call successors, (47) [2023-11-29 01:37:34,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 889 transitions. [2023-11-29 01:37:34,429 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 889 transitions. Word has length 110 [2023-11-29 01:37:34,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:37:34,429 INFO L495 AbstractCegarLoop]: Abstraction has 679 states and 889 transitions. [2023-11-29 01:37:34,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 8.68421052631579) internal successors, (165), 18 states have internal predecessors, (165), 6 states have call successors, (16), 7 states have call predecessors, (16), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-29 01:37:34,429 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 889 transitions. [2023-11-29 01:37:34,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-29 01:37:34,430 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:37:34,430 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:37:34,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-11-29 01:37:34,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:34,631 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:37:34,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:37:34,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1748531650, now seen corresponding path program 1 times [2023-11-29 01:37:34,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:37:34,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326146600] [2023-11-29 01:37:34,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:34,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:37:34,644 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:37:34,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [664143826] [2023-11-29 01:37:34,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:34,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:34,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:37:34,646 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:37:34,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-11-29 01:37:34,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:37:34,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-29 01:37:34,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:37:34,853 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 [2023-11-29 01:37:34,856 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 [2023-11-29 01:37:34,861 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 [2023-11-29 01:37:36,852 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:37:36,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 53 [2023-11-29 01:37:36,890 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 40 proven. 3 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-29 01:37:36,890 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:37:39,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:37:39,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326146600] [2023-11-29 01:37:39,775 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:37:39,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664143826] [2023-11-29 01:37:39,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664143826] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:37:39,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:37:39,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-11-29 01:37:39,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598841300] [2023-11-29 01:37:39,776 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:37:39,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 01:37:39,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:37:39,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 01:37:39,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2023-11-29 01:37:39,777 INFO L87 Difference]: Start difference. First operand 679 states and 889 transitions. Second operand has 15 states, 13 states have (on average 6.538461538461538) internal successors, (85), 12 states have internal predecessors, (85), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-29 01:37:41,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:37:41,732 INFO L93 Difference]: Finished difference Result 764 states and 921 transitions. [2023-11-29 01:37:41,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 01:37:41,733 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 6.538461538461538) internal successors, (85), 12 states have internal predecessors, (85), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 113 [2023-11-29 01:37:41,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:37:41,735 INFO L225 Difference]: With dead ends: 764 [2023-11-29 01:37:41,735 INFO L226 Difference]: Without dead ends: 762 [2023-11-29 01:37:41,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2023-11-29 01:37:41,735 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 409 mSDsluCounter, 2564 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 24 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 2798 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:37:41,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 2798 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 869 Invalid, 5 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 01:37:41,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2023-11-29 01:37:41,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 679. [2023-11-29 01:37:41,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 509 states have (on average 1.5736738703339883) internal successors, (801), 626 states have internal predecessors, (801), 39 states have call successors, (39), 12 states have call predecessors, (39), 16 states have return successors, (47), 40 states have call predecessors, (47), 39 states have call successors, (47) [2023-11-29 01:37:41,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 887 transitions. [2023-11-29 01:37:41,805 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 887 transitions. Word has length 113 [2023-11-29 01:37:41,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:37:41,805 INFO L495 AbstractCegarLoop]: Abstraction has 679 states and 887 transitions. [2023-11-29 01:37:41,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 6.538461538461538) internal successors, (85), 12 states have internal predecessors, (85), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-29 01:37:41,806 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 887 transitions. [2023-11-29 01:37:41,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-11-29 01:37:41,806 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:37:41,806 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:37:41,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2023-11-29 01:37:42,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:42,007 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:37:42,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:37:42,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1006709476, now seen corresponding path program 1 times [2023-11-29 01:37:42,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:37:42,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024758485] [2023-11-29 01:37:42,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:42,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:37:42,022 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:37:42,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [530019376] [2023-11-29 01:37:42,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:42,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:42,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:37:42,023 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:37:42,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-11-29 01:37:42,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:37:42,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:37:42,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:37:42,284 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 [2023-11-29 01:37:42,294 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-29 01:37:42,294 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:37:42,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:37:42,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024758485] [2023-11-29 01:37:42,294 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:37:42,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530019376] [2023-11-29 01:37:42,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530019376] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:37:42,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:37:42,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:37:42,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119582816] [2023-11-29 01:37:42,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:37:42,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:37:42,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:37:42,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:37:42,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:37:42,296 INFO L87 Difference]: Start difference. First operand 679 states and 887 transitions. Second operand has 6 states, 5 states have (on average 16.8) internal successors, (84), 6 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-29 01:37:42,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:37:42,908 INFO L93 Difference]: Finished difference Result 679 states and 887 transitions. [2023-11-29 01:37:42,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:37:42,908 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.8) internal successors, (84), 6 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 115 [2023-11-29 01:37:42,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:37:42,910 INFO L225 Difference]: With dead ends: 679 [2023-11-29 01:37:42,910 INFO L226 Difference]: Without dead ends: 678 [2023-11-29 01:37:42,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:37:42,911 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 477 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:37:42,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [481 Valid, 813 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 01:37:42,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2023-11-29 01:37:42,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 678. [2023-11-29 01:37:42,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 509 states have (on average 1.567779960707269) internal successors, (798), 625 states have internal predecessors, (798), 39 states have call successors, (39), 12 states have call predecessors, (39), 16 states have return successors, (47), 40 states have call predecessors, (47), 39 states have call successors, (47) [2023-11-29 01:37:42,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 884 transitions. [2023-11-29 01:37:42,975 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 884 transitions. Word has length 115 [2023-11-29 01:37:42,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:37:42,975 INFO L495 AbstractCegarLoop]: Abstraction has 678 states and 884 transitions. [2023-11-29 01:37:42,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.8) internal successors, (84), 6 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-29 01:37:42,975 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 884 transitions. [2023-11-29 01:37:42,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-29 01:37:42,976 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:37:42,976 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:37:42,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2023-11-29 01:37:43,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:43,176 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:37:43,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:37:43,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1143222893, now seen corresponding path program 1 times [2023-11-29 01:37:43,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:37:43,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087401846] [2023-11-29 01:37:43,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:43,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:37:43,192 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:37:43,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1149651854] [2023-11-29 01:37:43,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:43,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:43,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:37:43,193 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:37:43,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-11-29 01:37:43,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:37:43,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:37:43,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:37:43,440 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 [2023-11-29 01:37:43,450 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-29 01:37:43,450 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:37:43,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:37:43,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087401846] [2023-11-29 01:37:43,451 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:37:43,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149651854] [2023-11-29 01:37:43,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149651854] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:37:43,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:37:43,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:37:43,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856093987] [2023-11-29 01:37:43,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:37:43,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:37:43,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:37:43,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:37:43,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:37:43,452 INFO L87 Difference]: Start difference. First operand 678 states and 884 transitions. Second operand has 6 states, 5 states have (on average 17.0) internal successors, (85), 6 states have internal predecessors, (85), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-29 01:37:43,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:37:43,956 INFO L93 Difference]: Finished difference Result 678 states and 884 transitions. [2023-11-29 01:37:43,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:37:43,956 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 17.0) internal successors, (85), 6 states have internal predecessors, (85), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 116 [2023-11-29 01:37:43,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:37:43,958 INFO L225 Difference]: With dead ends: 678 [2023-11-29 01:37:43,958 INFO L226 Difference]: Without dead ends: 677 [2023-11-29 01:37:43,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:37:43,958 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 474 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:37:43,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [478 Valid, 813 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:37:43,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2023-11-29 01:37:44,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 677. [2023-11-29 01:37:44,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 509 states have (on average 1.5618860510805501) internal successors, (795), 624 states have internal predecessors, (795), 39 states have call successors, (39), 12 states have call predecessors, (39), 16 states have return successors, (47), 40 states have call predecessors, (47), 39 states have call successors, (47) [2023-11-29 01:37:44,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 881 transitions. [2023-11-29 01:37:44,024 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 881 transitions. Word has length 116 [2023-11-29 01:37:44,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:37:44,024 INFO L495 AbstractCegarLoop]: Abstraction has 677 states and 881 transitions. [2023-11-29 01:37:44,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 17.0) internal successors, (85), 6 states have internal predecessors, (85), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-29 01:37:44,024 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 881 transitions. [2023-11-29 01:37:44,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-29 01:37:44,025 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:37:44,025 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:37:44,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2023-11-29 01:37:44,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:44,226 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:37:44,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:37:44,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1080171526, now seen corresponding path program 1 times [2023-11-29 01:37:44,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:37:44,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114632663] [2023-11-29 01:37:44,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:44,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:37:44,240 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:37:44,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1515469706] [2023-11-29 01:37:44,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:44,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:44,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:37:44,241 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:37:44,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-11-29 01:37:44,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:37:44,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 01:37:44,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:37:44,437 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 [2023-11-29 01:37:44,440 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 [2023-11-29 01:37:45,433 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 [2023-11-29 01:37:45,467 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-29 01:37:45,467 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:37:45,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:37:45,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114632663] [2023-11-29 01:37:45,468 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:37:45,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515469706] [2023-11-29 01:37:45,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515469706] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:37:45,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:37:45,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-29 01:37:45,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450905635] [2023-11-29 01:37:45,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:37:45,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 01:37:45,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:37:45,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 01:37:45,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:37:45,470 INFO L87 Difference]: Start difference. First operand 677 states and 881 transitions. Second operand has 11 states, 9 states have (on average 9.555555555555555) internal successors, (86), 10 states have internal predecessors, (86), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-29 01:37:46,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:37:46,356 INFO L93 Difference]: Finished difference Result 758 states and 913 transitions. [2023-11-29 01:37:46,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 01:37:46,357 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 9.555555555555555) internal successors, (86), 10 states have internal predecessors, (86), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 117 [2023-11-29 01:37:46,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:37:46,359 INFO L225 Difference]: With dead ends: 758 [2023-11-29 01:37:46,359 INFO L226 Difference]: Without dead ends: 757 [2023-11-29 01:37:46,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 105 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-11-29 01:37:46,360 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 381 mSDsluCounter, 1573 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 1820 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 01:37:46,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 1820 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 01:37:46,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2023-11-29 01:37:46,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 677. [2023-11-29 01:37:46,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 509 states have (on average 1.5599214145383105) internal successors, (794), 624 states have internal predecessors, (794), 39 states have call successors, (39), 12 states have call predecessors, (39), 16 states have return successors, (47), 40 states have call predecessors, (47), 39 states have call successors, (47) [2023-11-29 01:37:46,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 880 transitions. [2023-11-29 01:37:46,454 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 880 transitions. Word has length 117 [2023-11-29 01:37:46,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:37:46,454 INFO L495 AbstractCegarLoop]: Abstraction has 677 states and 880 transitions. [2023-11-29 01:37:46,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 9.555555555555555) internal successors, (86), 10 states have internal predecessors, (86), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-29 01:37:46,455 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 880 transitions. [2023-11-29 01:37:46,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-29 01:37:46,455 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:37:46,456 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:37:46,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2023-11-29 01:37:46,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-11-29 01:37:46,656 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:37:46,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:37:46,656 INFO L85 PathProgramCache]: Analyzing trace with hash -874420849, now seen corresponding path program 1 times [2023-11-29 01:37:46,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:37:46,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975653769] [2023-11-29 01:37:46,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:46,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:37:46,674 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:37:46,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1990009720] [2023-11-29 01:37:46,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:46,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:46,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:37:46,676 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:37:46,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-11-29 01:37:46,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:37:46,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 01:37:46,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:37:46,922 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 [2023-11-29 01:37:46,931 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 [2023-11-29 01:37:46,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 35 [2023-11-29 01:37:46,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2023-11-29 01:37:46,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2023-11-29 01:37:50,466 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 [2023-11-29 01:37:50,660 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:37:50,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 60 [2023-11-29 01:37:50,763 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-29 01:37:50,763 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:37:50,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:37:50,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975653769] [2023-11-29 01:37:50,763 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:37:50,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990009720] [2023-11-29 01:37:50,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990009720] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:37:50,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:37:50,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-29 01:37:50,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488457251] [2023-11-29 01:37:50,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:37:50,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 01:37:50,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:37:50,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 01:37:50,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-11-29 01:37:50,765 INFO L87 Difference]: Start difference. First operand 677 states and 880 transitions. Second operand has 12 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-29 01:37:52,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:37:52,846 INFO L93 Difference]: Finished difference Result 757 states and 912 transitions. [2023-11-29 01:37:52,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 01:37:52,846 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 118 [2023-11-29 01:37:52,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:37:52,847 INFO L225 Difference]: With dead ends: 757 [2023-11-29 01:37:52,848 INFO L226 Difference]: Without dead ends: 756 [2023-11-29 01:37:52,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-11-29 01:37:52,848 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 550 mSDsluCounter, 1895 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 2131 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-29 01:37:52,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [556 Valid, 2131 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 628 Invalid, 1 Unknown, 0 Unchecked, 1.7s Time] [2023-11-29 01:37:52,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2023-11-29 01:37:52,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 677. [2023-11-29 01:37:52,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 509 states have (on average 1.5579567779960708) internal successors, (793), 624 states have internal predecessors, (793), 39 states have call successors, (39), 12 states have call predecessors, (39), 16 states have return successors, (47), 40 states have call predecessors, (47), 39 states have call successors, (47) [2023-11-29 01:37:52,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 879 transitions. [2023-11-29 01:37:52,927 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 879 transitions. Word has length 118 [2023-11-29 01:37:52,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:37:52,927 INFO L495 AbstractCegarLoop]: Abstraction has 677 states and 879 transitions. [2023-11-29 01:37:52,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-29 01:37:52,927 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 879 transitions. [2023-11-29 01:37:52,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-11-29 01:37:52,928 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:37:52,928 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:37:52,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2023-11-29 01:37:53,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-11-29 01:37:53,129 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:37:53,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:37:53,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1337242328, now seen corresponding path program 1 times [2023-11-29 01:37:53,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:37:53,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356487002] [2023-11-29 01:37:53,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:53,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:37:53,145 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:37:53,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [429520809] [2023-11-29 01:37:53,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:53,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:53,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:37:53,146 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:37:53,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-11-29 01:37:53,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:37:53,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:37:53,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:37:53,343 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 [2023-11-29 01:37:53,538 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-29 01:37:53,538 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:37:53,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:37:53,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356487002] [2023-11-29 01:37:53,538 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:37:53,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429520809] [2023-11-29 01:37:53,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429520809] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:37:53,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:37:53,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:37:53,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204631405] [2023-11-29 01:37:53,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:37:53,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:37:53,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:37:53,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:37:53,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:37:53,539 INFO L87 Difference]: Start difference. First operand 677 states and 879 transitions. Second operand has 6 states, 5 states have (on average 17.6) internal successors, (88), 6 states have internal predecessors, (88), 2 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-29 01:37:53,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:37:53,871 INFO L93 Difference]: Finished difference Result 756 states and 911 transitions. [2023-11-29 01:37:53,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:37:53,871 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 17.6) internal successors, (88), 6 states have internal predecessors, (88), 2 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 119 [2023-11-29 01:37:53,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:37:53,872 INFO L225 Difference]: With dead ends: 756 [2023-11-29 01:37:53,872 INFO L226 Difference]: Without dead ends: 755 [2023-11-29 01:37:53,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:37:53,873 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 256 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 38 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 1162 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:37:53,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 1162 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 188 Invalid, 4 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:37:53,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2023-11-29 01:37:53,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 677. [2023-11-29 01:37:53,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 509 states have (on average 1.5559921414538311) internal successors, (792), 624 states have internal predecessors, (792), 39 states have call successors, (39), 12 states have call predecessors, (39), 16 states have return successors, (47), 40 states have call predecessors, (47), 39 states have call successors, (47) [2023-11-29 01:37:53,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 878 transitions. [2023-11-29 01:37:53,971 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 878 transitions. Word has length 119 [2023-11-29 01:37:53,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:37:53,972 INFO L495 AbstractCegarLoop]: Abstraction has 677 states and 878 transitions. [2023-11-29 01:37:53,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 17.6) internal successors, (88), 6 states have internal predecessors, (88), 2 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-29 01:37:53,972 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 878 transitions. [2023-11-29 01:37:53,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-11-29 01:37:53,972 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:37:53,972 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:37:53,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2023-11-29 01:37:54,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2023-11-29 01:37:54,173 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:37:54,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:37:54,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1495161009, now seen corresponding path program 1 times [2023-11-29 01:37:54,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:37:54,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867193762] [2023-11-29 01:37:54,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:54,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:37:54,189 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:37:54,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [165058432] [2023-11-29 01:37:54,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:54,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:54,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:37:54,190 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:37:54,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-11-29 01:37:54,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:37:54,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:37:54,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:37:54,403 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 [2023-11-29 01:37:54,560 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-29 01:37:54,560 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:37:54,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:37:54,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867193762] [2023-11-29 01:37:54,560 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:37:54,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165058432] [2023-11-29 01:37:54,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165058432] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:37:54,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:37:54,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:37:54,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800856356] [2023-11-29 01:37:54,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:37:54,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:37:54,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:37:54,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:37:54,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:37:54,562 INFO L87 Difference]: Start difference. First operand 677 states and 878 transitions. Second operand has 6 states, 5 states have (on average 17.8) internal successors, (89), 6 states have internal predecessors, (89), 2 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-29 01:37:54,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:37:54,936 INFO L93 Difference]: Finished difference Result 755 states and 910 transitions. [2023-11-29 01:37:54,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:37:54,936 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 17.8) internal successors, (89), 6 states have internal predecessors, (89), 2 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 120 [2023-11-29 01:37:54,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:37:54,938 INFO L225 Difference]: With dead ends: 755 [2023-11-29 01:37:54,938 INFO L226 Difference]: Without dead ends: 754 [2023-11-29 01:37:54,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 113 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:37:54,939 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 253 mSDsluCounter, 913 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 38 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 1164 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:37:54,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 1164 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 186 Invalid, 4 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:37:54,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2023-11-29 01:37:55,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 677. [2023-11-29 01:37:55,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 509 states have (on average 1.5540275049115913) internal successors, (791), 624 states have internal predecessors, (791), 39 states have call successors, (39), 12 states have call predecessors, (39), 16 states have return successors, (47), 40 states have call predecessors, (47), 39 states have call successors, (47) [2023-11-29 01:37:55,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 877 transitions. [2023-11-29 01:37:55,020 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 877 transitions. Word has length 120 [2023-11-29 01:37:55,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:37:55,020 INFO L495 AbstractCegarLoop]: Abstraction has 677 states and 877 transitions. [2023-11-29 01:37:55,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 17.8) internal successors, (89), 6 states have internal predecessors, (89), 2 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-29 01:37:55,020 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 877 transitions. [2023-11-29 01:37:55,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-29 01:37:55,021 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:37:55,021 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:37:55,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2023-11-29 01:37:55,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-11-29 01:37:55,222 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting func_to_recursive_line_29_to_41_0Err16ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:37:55,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:37:55,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1132434924, now seen corresponding path program 1 times [2023-11-29 01:37:55,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:37:55,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919996974] [2023-11-29 01:37:55,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:55,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:37:55,238 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:37:55,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [652110147] [2023-11-29 01:37:55,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:55,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:55,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:37:55,240 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:37:55,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-11-29 01:37:55,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:37:55,454 INFO L262 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 01:37:55,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:37:55,460 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 [2023-11-29 01:37:55,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-11-29 01:37:55,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-29 01:37:56,018 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-29 01:37:56,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:37:56,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:37:56,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919996974] [2023-11-29 01:37:56,249 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:37:56,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652110147] [2023-11-29 01:37:56,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652110147] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:37:56,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:37:56,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-11-29 01:37:56,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978036116] [2023-11-29 01:37:56,249 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:37:56,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 01:37:56,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:37:56,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 01:37:56,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-11-29 01:37:56,250 INFO L87 Difference]: Start difference. First operand 677 states and 877 transitions. Second operand has 12 states, 10 states have (on average 9.0) internal successors, (90), 9 states have internal predecessors, (90), 3 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-29 01:38:00,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:38:04,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:38:08,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:38:09,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:38:09,045 INFO L93 Difference]: Finished difference Result 880 states and 941 transitions. [2023-11-29 01:38:09,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 01:38:09,046 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 9.0) internal successors, (90), 9 states have internal predecessors, (90), 3 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 121 [2023-11-29 01:38:09,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:38:09,047 INFO L225 Difference]: With dead ends: 880 [2023-11-29 01:38:09,047 INFO L226 Difference]: Without dead ends: 879 [2023-11-29 01:38:09,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 100 SyntacticMatches, 12 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2023-11-29 01:38:09,048 INFO L413 NwaCegarLoop]: 480 mSDtfsCounter, 612 mSDsluCounter, 2391 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 26 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 2871 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:38:09,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [617 Valid, 2871 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 373 Invalid, 3 Unknown, 0 Unchecked, 12.5s Time] [2023-11-29 01:38:09,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2023-11-29 01:38:09,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 677. [2023-11-29 01:38:09,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 509 states have (on average 1.5520628683693516) internal successors, (790), 624 states have internal predecessors, (790), 39 states have call successors, (39), 12 states have call predecessors, (39), 16 states have return successors, (47), 40 states have call predecessors, (47), 39 states have call successors, (47) [2023-11-29 01:38:09,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 876 transitions. [2023-11-29 01:38:09,122 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 876 transitions. Word has length 121 [2023-11-29 01:38:09,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:38:09,123 INFO L495 AbstractCegarLoop]: Abstraction has 677 states and 876 transitions. [2023-11-29 01:38:09,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 9.0) internal successors, (90), 9 states have internal predecessors, (90), 3 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-29 01:38:09,123 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 876 transitions. [2023-11-29 01:38:09,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-29 01:38:09,123 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:38:09,123 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:38:09,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2023-11-29 01:38:09,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:38:09,324 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:38:09,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:38:09,324 INFO L85 PathProgramCache]: Analyzing trace with hash -894648758, now seen corresponding path program 1 times [2023-11-29 01:38:09,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:38:09,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911561156] [2023-11-29 01:38:09,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:38:09,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:38:09,339 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:38:09,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1654098513] [2023-11-29 01:38:09,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:38:09,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:38:09,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:38:09,340 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:38:09,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-11-29 01:38:09,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:38:09,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 01:38:09,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:38:09,568 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 [2023-11-29 01:38:09,573 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 [2023-11-29 01:38:09,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 35 [2023-11-29 01:38:09,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2023-11-29 01:38:09,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2023-11-29 01:38:12,772 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:38:12,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 57 [2023-11-29 01:38:12,884 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-29 01:38:12,884 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:38:12,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:38:12,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911561156] [2023-11-29 01:38:12,884 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:38:12,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654098513] [2023-11-29 01:38:12,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654098513] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:38:12,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:38:12,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 01:38:12,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329656021] [2023-11-29 01:38:12,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:38:12,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 01:38:12,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:38:12,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 01:38:12,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-11-29 01:38:12,885 INFO L87 Difference]: Start difference. First operand 677 states and 876 transitions. Second operand has 13 states, 11 states have (on average 8.181818181818182) internal successors, (90), 11 states have internal predecessors, (90), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-29 01:38:14,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:38:14,318 INFO L93 Difference]: Finished difference Result 754 states and 908 transitions. [2023-11-29 01:38:14,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 01:38:14,318 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 8.181818181818182) internal successors, (90), 11 states have internal predecessors, (90), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 121 [2023-11-29 01:38:14,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:38:14,320 INFO L225 Difference]: With dead ends: 754 [2023-11-29 01:38:14,320 INFO L226 Difference]: Without dead ends: 753 [2023-11-29 01:38:14,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2023-11-29 01:38:14,321 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 625 mSDsluCounter, 1735 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 34 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 1973 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:38:14,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [631 Valid, 1973 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 542 Invalid, 3 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 01:38:14,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2023-11-29 01:38:14,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 677. [2023-11-29 01:38:14,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 509 states have (on average 1.550098231827112) internal successors, (789), 624 states have internal predecessors, (789), 39 states have call successors, (39), 12 states have call predecessors, (39), 16 states have return successors, (47), 40 states have call predecessors, (47), 39 states have call successors, (47) [2023-11-29 01:38:14,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 875 transitions. [2023-11-29 01:38:14,417 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 875 transitions. Word has length 121 [2023-11-29 01:38:14,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:38:14,417 INFO L495 AbstractCegarLoop]: Abstraction has 677 states and 875 transitions. [2023-11-29 01:38:14,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 8.181818181818182) internal successors, (90), 11 states have internal predecessors, (90), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-29 01:38:14,417 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 875 transitions. [2023-11-29 01:38:14,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-29 01:38:14,418 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:38:14,418 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:38:14,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2023-11-29 01:38:14,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:38:14,618 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting func_to_recursive_line_29_to_41_0Err17ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:38:14,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:38:14,619 INFO L85 PathProgramCache]: Analyzing trace with hash -745744203, now seen corresponding path program 1 times [2023-11-29 01:38:14,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:38:14,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715774033] [2023-11-29 01:38:14,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:38:14,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:38:14,635 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:38:14,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2087425887] [2023-11-29 01:38:14,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:38:14,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:38:14,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:38:14,637 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:38:14,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-11-29 01:38:14,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:38:14,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 01:38:14,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:38:14,852 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 [2023-11-29 01:38:15,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:38:15,399 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-29 01:38:15,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:38:19,962 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 22 refuted. 2 times theorem prover too weak. 84 trivial. 0 not checked. [2023-11-29 01:38:19,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:38:19,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715774033] [2023-11-29 01:38:19,962 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:38:19,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087425887] [2023-11-29 01:38:19,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087425887] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:38:19,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:38:19,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 19 [2023-11-29 01:38:19,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306953720] [2023-11-29 01:38:19,963 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:38:19,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 01:38:19,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:38:19,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 01:38:19,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=313, Unknown=1, NotChecked=0, Total=380 [2023-11-29 01:38:19,964 INFO L87 Difference]: Start difference. First operand 677 states and 875 transitions. Second operand has 20 states, 17 states have (on average 10.529411764705882) internal successors, (179), 16 states have internal predecessors, (179), 6 states have call successors, (18), 7 states have call predecessors, (18), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2023-11-29 01:38:25,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 01:38:38,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 01:38:43,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 01:38:47,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 01:38:47,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:38:47,521 INFO L93 Difference]: Finished difference Result 908 states and 941 transitions. [2023-11-29 01:38:47,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 01:38:47,522 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 10.529411764705882) internal successors, (179), 16 states have internal predecessors, (179), 6 states have call successors, (18), 7 states have call predecessors, (18), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 122 [2023-11-29 01:38:47,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:38:47,523 INFO L225 Difference]: With dead ends: 908 [2023-11-29 01:38:47,523 INFO L226 Difference]: Without dead ends: 907 [2023-11-29 01:38:47,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 212 SyntacticMatches, 12 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=193, Invalid=734, Unknown=3, NotChecked=0, Total=930 [2023-11-29 01:38:47,524 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 781 mSDsluCounter, 5837 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 44 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 6312 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.8s IncrementalHoareTripleChecker+Time [2023-11-29 01:38:47,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [787 Valid, 6312 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 862 Invalid, 4 Unknown, 0 Unchecked, 18.8s Time] [2023-11-29 01:38:47,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2023-11-29 01:38:47,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 677. [2023-11-29 01:38:47,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 509 states have (on average 1.5461689587426326) internal successors, (787), 624 states have internal predecessors, (787), 39 states have call successors, (39), 12 states have call predecessors, (39), 16 states have return successors, (47), 40 states have call predecessors, (47), 39 states have call successors, (47) [2023-11-29 01:38:47,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 873 transitions. [2023-11-29 01:38:47,606 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 873 transitions. Word has length 122 [2023-11-29 01:38:47,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:38:47,607 INFO L495 AbstractCegarLoop]: Abstraction has 677 states and 873 transitions. [2023-11-29 01:38:47,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 10.529411764705882) internal successors, (179), 16 states have internal predecessors, (179), 6 states have call successors, (18), 7 states have call predecessors, (18), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2023-11-29 01:38:47,607 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 873 transitions. [2023-11-29 01:38:47,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-29 01:38:47,607 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:38:47,607 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:38:47,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2023-11-29 01:38:47,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:38:47,808 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:38:47,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:38:47,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1964307501, now seen corresponding path program 1 times [2023-11-29 01:38:47,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:38:47,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036724931] [2023-11-29 01:38:47,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:38:47,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:38:47,829 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:38:47,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1020162038] [2023-11-29 01:38:47,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:38:47,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:38:47,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:38:47,830 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:38:47,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-11-29 01:38:48,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:38:48,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 01:38:48,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:38:48,030 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 [2023-11-29 01:38:48,216 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-29 01:38:48,216 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:38:48,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:38:48,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036724931] [2023-11-29 01:38:48,217 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:38:48,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020162038] [2023-11-29 01:38:48,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020162038] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:38:48,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:38:48,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:38:48,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716298033] [2023-11-29 01:38:48,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:38:48,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:38:48,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:38:48,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:38:48,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:38:48,218 INFO L87 Difference]: Start difference. First operand 677 states and 873 transitions. Second operand has 6 states, 5 states have (on average 18.2) internal successors, (91), 6 states have internal predecessors, (91), 2 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-29 01:38:48,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:38:48,607 INFO L93 Difference]: Finished difference Result 753 states and 905 transitions. [2023-11-29 01:38:48,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:38:48,608 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 18.2) internal successors, (91), 6 states have internal predecessors, (91), 2 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 122 [2023-11-29 01:38:48,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:38:48,609 INFO L225 Difference]: With dead ends: 753 [2023-11-29 01:38:48,609 INFO L226 Difference]: Without dead ends: 752 [2023-11-29 01:38:48,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 115 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:38:48,610 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 247 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 37 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 1158 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:38:48,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 1158 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 193 Invalid, 4 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:38:48,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2023-11-29 01:38:48,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 677. [2023-11-29 01:38:48,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 509 states have (on average 1.544204322200393) internal successors, (786), 624 states have internal predecessors, (786), 39 states have call successors, (39), 12 states have call predecessors, (39), 16 states have return successors, (47), 40 states have call predecessors, (47), 39 states have call successors, (47) [2023-11-29 01:38:48,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 872 transitions. [2023-11-29 01:38:48,703 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 872 transitions. Word has length 122 [2023-11-29 01:38:48,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:38:48,703 INFO L495 AbstractCegarLoop]: Abstraction has 677 states and 872 transitions. [2023-11-29 01:38:48,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 18.2) internal successors, (91), 6 states have internal predecessors, (91), 2 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-29 01:38:48,704 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 872 transitions. [2023-11-29 01:38:48,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-29 01:38:48,704 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:38:48,705 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:38:48,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2023-11-29 01:38:48,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:38:48,905 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:38:48,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:38:48,905 INFO L85 PathProgramCache]: Analyzing trace with hash -763990164, now seen corresponding path program 1 times [2023-11-29 01:38:48,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:38:48,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205787398] [2023-11-29 01:38:48,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:38:48,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:38:48,922 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:38:48,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1446018544] [2023-11-29 01:38:48,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:38:48,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:38:48,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:38:48,923 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:38:48,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-11-29 01:38:49,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:38:49,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 01:38:49,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:38:49,145 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 [2023-11-29 01:38:49,307 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 [2023-11-29 01:38:49,313 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-29 01:38:49,314 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:38:49,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:38:49,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205787398] [2023-11-29 01:38:49,314 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:38:49,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446018544] [2023-11-29 01:38:49,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446018544] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:38:49,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:38:49,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:38:49,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99785028] [2023-11-29 01:38:49,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:38:49,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:38:49,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:38:49,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:38:49,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:38:49,315 INFO L87 Difference]: Start difference. First operand 677 states and 872 transitions. Second operand has 6 states, 5 states have (on average 18.4) internal successors, (92), 6 states have internal predecessors, (92), 2 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-29 01:38:53,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:38:57,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:38:57,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:38:57,741 INFO L93 Difference]: Finished difference Result 752 states and 904 transitions. [2023-11-29 01:38:57,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:38:57,742 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 18.4) internal successors, (92), 6 states have internal predecessors, (92), 2 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 123 [2023-11-29 01:38:57,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:38:57,743 INFO L225 Difference]: With dead ends: 752 [2023-11-29 01:38:57,743 INFO L226 Difference]: Without dead ends: 751 [2023-11-29 01:38:57,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:38:57,744 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 364 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 41 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:38:57,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 959 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 179 Invalid, 3 Unknown, 0 Unchecked, 8.3s Time] [2023-11-29 01:38:57,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2023-11-29 01:38:57,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 677. [2023-11-29 01:38:57,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 509 states have (on average 1.5422396856581533) internal successors, (785), 624 states have internal predecessors, (785), 39 states have call successors, (39), 12 states have call predecessors, (39), 16 states have return successors, (47), 40 states have call predecessors, (47), 39 states have call successors, (47) [2023-11-29 01:38:57,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 871 transitions. [2023-11-29 01:38:57,819 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 871 transitions. Word has length 123 [2023-11-29 01:38:57,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:38:57,820 INFO L495 AbstractCegarLoop]: Abstraction has 677 states and 871 transitions. [2023-11-29 01:38:57,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 18.4) internal successors, (92), 6 states have internal predecessors, (92), 2 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-29 01:38:57,820 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 871 transitions. [2023-11-29 01:38:57,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-29 01:38:57,820 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:38:57,820 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:38:57,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2023-11-29 01:38:58,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2023-11-29 01:38:58,021 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:38:58,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:38:58,021 INFO L85 PathProgramCache]: Analyzing trace with hash 2086108917, now seen corresponding path program 1 times [2023-11-29 01:38:58,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:38:58,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258366045] [2023-11-29 01:38:58,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:38:58,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:38:58,035 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:38:58,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1661224178] [2023-11-29 01:38:58,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:38:58,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:38:58,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:38:58,036 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:38:58,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2023-11-29 01:38:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:38:58,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 01:38:58,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:38:58,245 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 [2023-11-29 01:38:58,410 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 [2023-11-29 01:38:58,419 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-29 01:38:58,419 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:38:58,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:38:58,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258366045] [2023-11-29 01:38:58,419 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:38:58,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661224178] [2023-11-29 01:38:58,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661224178] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:38:58,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:38:58,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:38:58,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208935255] [2023-11-29 01:38:58,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:38:58,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:38:58,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:38:58,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:38:58,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:38:58,420 INFO L87 Difference]: Start difference. First operand 677 states and 871 transitions. Second operand has 6 states, 5 states have (on average 18.6) internal successors, (93), 6 states have internal predecessors, (93), 2 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-29 01:38:58,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:38:58,828 INFO L93 Difference]: Finished difference Result 751 states and 903 transitions. [2023-11-29 01:38:58,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:38:58,828 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 18.6) internal successors, (93), 6 states have internal predecessors, (93), 2 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 124 [2023-11-29 01:38:58,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:38:58,829 INFO L225 Difference]: With dead ends: 751 [2023-11-29 01:38:58,830 INFO L226 Difference]: Without dead ends: 750 [2023-11-29 01:38:58,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 117 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:38:58,830 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 360 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 41 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 961 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:38:58,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 961 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 177 Invalid, 3 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:38:58,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2023-11-29 01:38:58,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 677. [2023-11-29 01:38:58,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 509 states have (on average 1.5402750491159136) internal successors, (784), 624 states have internal predecessors, (784), 39 states have call successors, (39), 12 states have call predecessors, (39), 16 states have return successors, (47), 40 states have call predecessors, (47), 39 states have call successors, (47) [2023-11-29 01:38:58,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 870 transitions. [2023-11-29 01:38:58,907 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 870 transitions. Word has length 124 [2023-11-29 01:38:58,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:38:58,907 INFO L495 AbstractCegarLoop]: Abstraction has 677 states and 870 transitions. [2023-11-29 01:38:58,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 18.6) internal successors, (93), 6 states have internal predecessors, (93), 2 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-29 01:38:58,907 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 870 transitions. [2023-11-29 01:38:58,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-11-29 01:38:58,908 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:38:58,908 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:38:58,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2023-11-29 01:38:59,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2023-11-29 01:38:59,109 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:38:59,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:38:59,109 INFO L85 PathProgramCache]: Analyzing trace with hash 244867214, now seen corresponding path program 1 times [2023-11-29 01:38:59,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:38:59,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644537321] [2023-11-29 01:38:59,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:38:59,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:38:59,126 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:38:59,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1538226881] [2023-11-29 01:38:59,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:38:59,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:38:59,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:38:59,127 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:38:59,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2023-11-29 01:38:59,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:38:59,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 01:38:59,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:38:59,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 01:38:59,525 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 [2023-11-29 01:38:59,548 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-29 01:38:59,548 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:38:59,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:38:59,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644537321] [2023-11-29 01:38:59,549 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:38:59,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538226881] [2023-11-29 01:38:59,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538226881] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:38:59,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:38:59,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 01:38:59,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125071587] [2023-11-29 01:38:59,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:38:59,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:38:59,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:38:59,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:38:59,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:38:59,550 INFO L87 Difference]: Start difference. First operand 677 states and 870 transitions. Second operand has 7 states, 6 states have (on average 15.666666666666666) internal successors, (94), 7 states have internal predecessors, (94), 2 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-29 01:39:03,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:39:08,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:39:12,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:39:16,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:39:16,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:39:16,241 INFO L93 Difference]: Finished difference Result 750 states and 902 transitions. [2023-11-29 01:39:16,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:39:16,242 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.666666666666666) internal successors, (94), 7 states have internal predecessors, (94), 2 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 125 [2023-11-29 01:39:16,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:39:16,244 INFO L225 Difference]: With dead ends: 750 [2023-11-29 01:39:16,244 INFO L226 Difference]: Without dead ends: 748 [2023-11-29 01:39:16,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 117 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:39:16,245 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 247 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 39 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 1256 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.6s IncrementalHoareTripleChecker+Time [2023-11-29 01:39:16,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 1256 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 232 Invalid, 5 Unknown, 0 Unchecked, 16.6s Time] [2023-11-29 01:39:16,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2023-11-29 01:39:16,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 677. [2023-11-29 01:39:16,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 509 states have (on average 1.536345776031434) internal successors, (782), 624 states have internal predecessors, (782), 39 states have call successors, (39), 12 states have call predecessors, (39), 16 states have return successors, (47), 40 states have call predecessors, (47), 39 states have call successors, (47) [2023-11-29 01:39:16,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 868 transitions. [2023-11-29 01:39:16,363 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 868 transitions. Word has length 125 [2023-11-29 01:39:16,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:39:16,363 INFO L495 AbstractCegarLoop]: Abstraction has 677 states and 868 transitions. [2023-11-29 01:39:16,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.666666666666666) internal successors, (94), 7 states have internal predecessors, (94), 2 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-29 01:39:16,364 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 868 transitions. [2023-11-29 01:39:16,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-11-29 01:39:16,364 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:39:16,364 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:39:16,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2023-11-29 01:39:16,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2023-11-29 01:39:16,565 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr29ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:39:16,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:39:16,565 INFO L85 PathProgramCache]: Analyzing trace with hash -999050729, now seen corresponding path program 1 times [2023-11-29 01:39:16,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:39:16,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576224250] [2023-11-29 01:39:16,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:39:16,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:39:16,582 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:39:16,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267015324] [2023-11-29 01:39:16,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:39:16,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:39:16,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:39:16,583 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:39:16,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2023-11-29 01:39:16,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:39:16,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-29 01:39:16,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:39:16,821 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 [2023-11-29 01:39:16,826 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 [2023-11-29 01:39:16,833 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 [2023-11-29 01:39:16,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 35 [2023-11-29 01:39:16,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2023-11-29 01:39:16,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2023-11-29 01:39:21,250 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:39:21,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 94 [2023-11-29 01:39:21,628 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 01:39:21,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:39:21,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:39:21,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576224250] [2023-11-29 01:39:21,947 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:39:21,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267015324] [2023-11-29 01:39:21,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267015324] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:39:21,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:39:21,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-11-29 01:39:21,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991928093] [2023-11-29 01:39:21,947 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:39:21,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 01:39:21,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:39:21,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 01:39:21,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2023-11-29 01:39:21,948 INFO L87 Difference]: Start difference. First operand 677 states and 868 transitions. Second operand has 20 states, 18 states have (on average 5.444444444444445) internal successors, (98), 16 states have internal predecessors, (98), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-29 01:39:25,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:39:25,213 INFO L93 Difference]: Finished difference Result 752 states and 903 transitions. [2023-11-29 01:39:25,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 01:39:25,214 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 5.444444444444445) internal successors, (98), 16 states have internal predecessors, (98), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 126 [2023-11-29 01:39:25,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:39:25,215 INFO L225 Difference]: With dead ends: 752 [2023-11-29 01:39:25,215 INFO L226 Difference]: Without dead ends: 750 [2023-11-29 01:39:25,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=253, Invalid=1387, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 01:39:25,216 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 659 mSDsluCounter, 1960 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 40 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 2180 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-29 01:39:25,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [665 Valid, 2180 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 996 Invalid, 13 Unknown, 0 Unchecked, 1.9s Time] [2023-11-29 01:39:25,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2023-11-29 01:39:25,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 681. [2023-11-29 01:39:25,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 512 states have (on average 1.529296875) internal successors, (783), 627 states have internal predecessors, (783), 39 states have call successors, (39), 13 states have call predecessors, (39), 17 states have return successors, (47), 40 states have call predecessors, (47), 39 states have call successors, (47) [2023-11-29 01:39:25,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 869 transitions. [2023-11-29 01:39:25,305 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 869 transitions. Word has length 126 [2023-11-29 01:39:25,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:39:25,306 INFO L495 AbstractCegarLoop]: Abstraction has 681 states and 869 transitions. [2023-11-29 01:39:25,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 5.444444444444445) internal successors, (98), 16 states have internal predecessors, (98), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-29 01:39:25,306 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 869 transitions. [2023-11-29 01:39:25,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-29 01:39:25,307 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:39:25,307 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:39:25,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2023-11-29 01:39:25,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:39:25,507 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting func_to_recursive_line_29_to_41_0Err18ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:39:25,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:39:25,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1691313815, now seen corresponding path program 1 times [2023-11-29 01:39:25,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:39:25,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790008503] [2023-11-29 01:39:25,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:39:25,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:39:25,522 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:39:25,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1979952319] [2023-11-29 01:39:25,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:39:25,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:39:25,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:39:25,523 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:39:25,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2023-11-29 01:39:25,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:39:25,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 81 conjunts are in the unsatisfiable core [2023-11-29 01:39:25,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:39:25,777 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 [2023-11-29 01:39:25,784 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 [2023-11-29 01:39:25,790 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 [2023-11-29 01:39:27,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-11-29 01:39:27,086 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 [2023-11-29 01:39:27,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-11-29 01:39:27,233 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 [2023-11-29 01:39:27,766 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:39:27,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2023-11-29 01:39:27,772 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 [2023-11-29 01:39:27,798 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 2 proven. 93 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-29 01:39:27,798 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:39:27,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:39:27,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790008503] [2023-11-29 01:39:27,943 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:39:27,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979952319] [2023-11-29 01:39:27,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979952319] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:39:27,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:39:27,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-11-29 01:39:27,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196729806] [2023-11-29 01:39:27,944 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:39:27,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 01:39:27,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:39:27,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 01:39:27,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2023-11-29 01:39:27,945 INFO L87 Difference]: Start difference. First operand 681 states and 869 transitions. Second operand has 18 states, 16 states have (on average 6.0) internal successors, (96), 14 states have internal predecessors, (96), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-29 01:39:31,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:39:36,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:39:40,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:39:44,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:39:48,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:39:54,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:39:58,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:40:02,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:40:06,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:40:06,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:40:06,758 INFO L93 Difference]: Finished difference Result 874 states and 933 transitions. [2023-11-29 01:40:06,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 01:40:06,759 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 6.0) internal successors, (96), 14 states have internal predecessors, (96), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 129 [2023-11-29 01:40:06,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:40:06,760 INFO L225 Difference]: With dead ends: 874 [2023-11-29 01:40:06,760 INFO L226 Difference]: Without dead ends: 873 [2023-11-29 01:40:06,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 101 SyntacticMatches, 12 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=145, Invalid=847, Unknown=0, NotChecked=0, Total=992 [2023-11-29 01:40:06,761 INFO L413 NwaCegarLoop]: 408 mSDtfsCounter, 938 mSDsluCounter, 3871 mSDsCounter, 0 mSdLazyCounter, 1451 mSolverCounterSat, 48 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 948 SdHoareTripleChecker+Valid, 4279 SdHoareTripleChecker+Invalid, 1508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1451 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:40:06,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [948 Valid, 4279 Invalid, 1508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1451 Invalid, 9 Unknown, 0 Unchecked, 38.1s Time] [2023-11-29 01:40:06,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2023-11-29 01:40:06,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 681. [2023-11-29 01:40:06,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 512 states have (on average 1.52734375) internal successors, (782), 627 states have internal predecessors, (782), 39 states have call successors, (39), 13 states have call predecessors, (39), 17 states have return successors, (47), 40 states have call predecessors, (47), 39 states have call successors, (47) [2023-11-29 01:40:06,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 868 transitions. [2023-11-29 01:40:06,849 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 868 transitions. Word has length 129 [2023-11-29 01:40:06,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:40:06,849 INFO L495 AbstractCegarLoop]: Abstraction has 681 states and 868 transitions. [2023-11-29 01:40:06,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 6.0) internal successors, (96), 14 states have internal predecessors, (96), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-29 01:40:06,849 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 868 transitions. [2023-11-29 01:40:06,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-29 01:40:06,850 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:40:06,850 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:40:06,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2023-11-29 01:40:07,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2023-11-29 01:40:07,050 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting func_to_recursive_line_29_to_41_0Err19ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:40:07,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:40:07,051 INFO L85 PathProgramCache]: Analyzing trace with hash -891120634, now seen corresponding path program 1 times [2023-11-29 01:40:07,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:40:07,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390732085] [2023-11-29 01:40:07,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:40:07,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:40:07,066 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:40:07,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [754173972] [2023-11-29 01:40:07,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:40:07,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:40:07,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:40:07,068 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:40:07,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2023-11-29 01:40:07,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:40:07,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 85 conjunts are in the unsatisfiable core [2023-11-29 01:40:07,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:40:07,336 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 [2023-11-29 01:40:07,342 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 [2023-11-29 01:40:07,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:40:08,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-11-29 01:40:08,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:40:08,735 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 [2023-11-29 01:40:09,222 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 [2023-11-29 01:40:09,247 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 2 proven. 94 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-29 01:40:09,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:40:09,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:40:09,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390732085] [2023-11-29 01:40:09,364 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:40:09,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754173972] [2023-11-29 01:40:09,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754173972] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:40:09,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:40:09,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-11-29 01:40:09,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543095428] [2023-11-29 01:40:09,365 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:40:09,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 01:40:09,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:40:09,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 01:40:09,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2023-11-29 01:40:09,366 INFO L87 Difference]: Start difference. First operand 681 states and 868 transitions. Second operand has 18 states, 16 states have (on average 6.0625) internal successors, (97), 14 states have internal predecessors, (97), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-29 01:40:11,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:40:11,906 INFO L93 Difference]: Finished difference Result 873 states and 932 transitions. [2023-11-29 01:40:11,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 01:40:11,906 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 6.0625) internal successors, (97), 14 states have internal predecessors, (97), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 130 [2023-11-29 01:40:11,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:40:11,907 INFO L225 Difference]: With dead ends: 873 [2023-11-29 01:40:11,907 INFO L226 Difference]: Without dead ends: 872 [2023-11-29 01:40:11,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 103 SyntacticMatches, 12 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=160, Invalid=896, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 01:40:11,908 INFO L413 NwaCegarLoop]: 408 mSDtfsCounter, 956 mSDsluCounter, 3426 mSDsCounter, 0 mSdLazyCounter, 1249 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 966 SdHoareTripleChecker+Valid, 3834 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-29 01:40:11,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [966 Valid, 3834 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1249 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-29 01:40:11,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2023-11-29 01:40:11,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 681. [2023-11-29 01:40:11,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 512 states have (on average 1.525390625) internal successors, (781), 627 states have internal predecessors, (781), 39 states have call successors, (39), 13 states have call predecessors, (39), 17 states have return successors, (47), 40 states have call predecessors, (47), 39 states have call successors, (47) [2023-11-29 01:40:11,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 867 transitions. [2023-11-29 01:40:11,997 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 867 transitions. Word has length 130 [2023-11-29 01:40:11,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:40:11,998 INFO L495 AbstractCegarLoop]: Abstraction has 681 states and 867 transitions. [2023-11-29 01:40:11,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 6.0625) internal successors, (97), 14 states have internal predecessors, (97), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-29 01:40:11,998 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 867 transitions. [2023-11-29 01:40:11,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-29 01:40:11,998 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:40:11,998 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:40:12,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2023-11-29 01:40:12,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2023-11-29 01:40:12,199 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting func_to_recursive_line_29_to_41_0Err20ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:40:12,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:40:12,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1854935797, now seen corresponding path program 1 times [2023-11-29 01:40:12,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:40:12,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478876279] [2023-11-29 01:40:12,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:40:12,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:40:12,217 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:40:12,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1538063421] [2023-11-29 01:40:12,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:40:12,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:40:12,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:40:12,218 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:40:12,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2023-11-29 01:40:12,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:40:12,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-29 01:40:12,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:40:12,479 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 [2023-11-29 01:40:12,486 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 [2023-11-29 01:40:13,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-11-29 01:40:13,435 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 [2023-11-29 01:40:13,448 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-29 01:40:13,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:40:13,731 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-11-29 01:40:13,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:40:13,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478876279] [2023-11-29 01:40:13,732 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:40:13,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538063421] [2023-11-29 01:40:13,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538063421] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:40:13,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:40:13,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 17 [2023-11-29 01:40:13,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280169925] [2023-11-29 01:40:13,732 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:40:13,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 01:40:13,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:40:13,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 01:40:13,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-11-29 01:40:13,734 INFO L87 Difference]: Start difference. First operand 681 states and 867 transitions. Second operand has 18 states, 15 states have (on average 12.466666666666667) internal successors, (187), 14 states have internal predecessors, (187), 6 states have call successors, (20), 7 states have call predecessors, (20), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-29 01:40:17,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:40:22,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:40:26,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:40:31,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:40:35,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:40:35,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:40:35,355 INFO L93 Difference]: Finished difference Result 872 states and 931 transitions. [2023-11-29 01:40:35,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 01:40:35,355 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 12.466666666666667) internal successors, (187), 14 states have internal predecessors, (187), 6 states have call successors, (20), 7 states have call predecessors, (20), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 131 [2023-11-29 01:40:35,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:40:35,357 INFO L225 Difference]: With dead ends: 872 [2023-11-29 01:40:35,357 INFO L226 Difference]: Without dead ends: 871 [2023-11-29 01:40:35,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 230 SyntacticMatches, 14 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2023-11-29 01:40:35,357 INFO L413 NwaCegarLoop]: 438 mSDtfsCounter, 743 mSDsluCounter, 4985 mSDsCounter, 0 mSdLazyCounter, 1259 mSolverCounterSat, 30 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 5423 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1259 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:40:35,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [749 Valid, 5423 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1259 Invalid, 5 Unknown, 0 Unchecked, 21.3s Time] [2023-11-29 01:40:35,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2023-11-29 01:40:35,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 681. [2023-11-29 01:40:35,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 512 states have (on average 1.5234375) internal successors, (780), 627 states have internal predecessors, (780), 39 states have call successors, (39), 13 states have call predecessors, (39), 17 states have return successors, (47), 40 states have call predecessors, (47), 39 states have call successors, (47) [2023-11-29 01:40:35,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 866 transitions. [2023-11-29 01:40:35,448 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 866 transitions. Word has length 131 [2023-11-29 01:40:35,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:40:35,448 INFO L495 AbstractCegarLoop]: Abstraction has 681 states and 866 transitions. [2023-11-29 01:40:35,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 12.466666666666667) internal successors, (187), 14 states have internal predecessors, (187), 6 states have call successors, (20), 7 states have call predecessors, (20), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-29 01:40:35,448 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 866 transitions. [2023-11-29 01:40:35,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-29 01:40:35,449 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:40:35,449 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:40:35,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2023-11-29 01:40:35,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:40:35,649 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting func_to_recursive_line_29_to_41_0Err21ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:40:35,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:40:35,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1668434776, now seen corresponding path program 1 times [2023-11-29 01:40:35,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:40:35,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322966131] [2023-11-29 01:40:35,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:40:35,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:40:35,670 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:40:35,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [596459711] [2023-11-29 01:40:35,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:40:35,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:40:35,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:40:35,671 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:40:35,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2023-11-29 01:40:35,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:40:35,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-29 01:40:35,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:40:35,915 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 [2023-11-29 01:40:35,921 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 [2023-11-29 01:40:36,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-11-29 01:40:36,821 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 [2023-11-29 01:40:36,835 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-29 01:40:36,835 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:40:37,099 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-11-29 01:40:37,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:40:37,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322966131] [2023-11-29 01:40:37,099 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:40:37,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596459711] [2023-11-29 01:40:37,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596459711] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:40:37,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:40:37,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 17 [2023-11-29 01:40:37,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997873089] [2023-11-29 01:40:37,100 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:40:37,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 01:40:37,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:40:37,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 01:40:37,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-11-29 01:40:37,101 INFO L87 Difference]: Start difference. First operand 681 states and 866 transitions. Second operand has 18 states, 15 states have (on average 12.6) internal successors, (189), 14 states have internal predecessors, (189), 6 states have call successors, (20), 7 states have call predecessors, (20), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-29 01:40:38,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:40:38,040 INFO L93 Difference]: Finished difference Result 871 states and 930 transitions. [2023-11-29 01:40:38,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 01:40:38,040 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 12.6) internal successors, (189), 14 states have internal predecessors, (189), 6 states have call successors, (20), 7 states have call predecessors, (20), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 132 [2023-11-29 01:40:38,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:40:38,041 INFO L225 Difference]: With dead ends: 871 [2023-11-29 01:40:38,042 INFO L226 Difference]: Without dead ends: 870 [2023-11-29 01:40:38,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 232 SyntacticMatches, 14 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2023-11-29 01:40:38,042 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 692 mSDsluCounter, 2884 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 3124 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 01:40:38,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [698 Valid, 3124 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 01:40:38,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2023-11-29 01:40:38,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 681. [2023-11-29 01:40:38,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 512 states have (on average 1.521484375) internal successors, (779), 627 states have internal predecessors, (779), 39 states have call successors, (39), 13 states have call predecessors, (39), 17 states have return successors, (47), 40 states have call predecessors, (47), 39 states have call successors, (47) [2023-11-29 01:40:38,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 865 transitions. [2023-11-29 01:40:38,174 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 865 transitions. Word has length 132 [2023-11-29 01:40:38,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:40:38,174 INFO L495 AbstractCegarLoop]: Abstraction has 681 states and 865 transitions. [2023-11-29 01:40:38,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 12.6) internal successors, (189), 14 states have internal predecessors, (189), 6 states have call successors, (20), 7 states have call predecessors, (20), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-29 01:40:38,174 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 865 transitions. [2023-11-29 01:40:38,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-11-29 01:40:38,175 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:40:38,175 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:40:38,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2023-11-29 01:40:38,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:40:38,375 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting func_to_recursive_line_29_to_41_0Err22ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:40:38,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:40:38,375 INFO L85 PathProgramCache]: Analyzing trace with hash -181870419, now seen corresponding path program 1 times [2023-11-29 01:40:38,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:40:38,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396146608] [2023-11-29 01:40:38,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:40:38,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:40:38,395 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:40:38,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039361397] [2023-11-29 01:40:38,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:40:38,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:40:38,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:40:38,396 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:40:38,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2023-11-29 01:40:38,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:40:38,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 82 conjunts are in the unsatisfiable core [2023-11-29 01:40:38,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:40:38,658 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 [2023-11-29 01:40:38,663 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 [2023-11-29 01:40:38,668 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 15 treesize of output 1 [2023-11-29 01:40:39,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-11-29 01:40:39,934 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 [2023-11-29 01:40:39,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-11-29 01:40:40,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 01:40:40,632 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:40:40,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2023-11-29 01:40:40,636 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 [2023-11-29 01:40:40,704 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 2 proven. 97 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-29 01:40:40,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:40:40,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:40:40,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396146608] [2023-11-29 01:40:40,843 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:40:40,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039361397] [2023-11-29 01:40:40,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039361397] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:40:40,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:40:40,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-11-29 01:40:40,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799002146] [2023-11-29 01:40:40,843 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:40:40,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 01:40:40,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:40:40,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 01:40:40,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2023-11-29 01:40:40,844 INFO L87 Difference]: Start difference. First operand 681 states and 865 transitions. Second operand has 19 states, 17 states have (on average 5.882352941176471) internal successors, (100), 15 states have internal predecessors, (100), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-29 01:40:44,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:40:48,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:40:53,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:40:57,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:41:01,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:41:06,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:41:10,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:41:15,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:41:19,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:41:23,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:41:27,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:41:27,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:41:27,558 INFO L93 Difference]: Finished difference Result 870 states and 929 transitions. [2023-11-29 01:41:27,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 01:41:27,559 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 5.882352941176471) internal successors, (100), 15 states have internal predecessors, (100), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 133 [2023-11-29 01:41:27,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:41:27,560 INFO L225 Difference]: With dead ends: 870 [2023-11-29 01:41:27,561 INFO L226 Difference]: Without dead ends: 869 [2023-11-29 01:41:27,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 107 SyntacticMatches, 12 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=168, Invalid=1022, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 01:41:27,561 INFO L413 NwaCegarLoop]: 410 mSDtfsCounter, 959 mSDsluCounter, 3849 mSDsCounter, 0 mSdLazyCounter, 1395 mSolverCounterSat, 46 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 969 SdHoareTripleChecker+Valid, 4259 SdHoareTripleChecker+Invalid, 1452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1395 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:41:27,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [969 Valid, 4259 Invalid, 1452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1395 Invalid, 11 Unknown, 0 Unchecked, 46.0s Time] [2023-11-29 01:41:27,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2023-11-29 01:41:27,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 681. [2023-11-29 01:41:27,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 512 states have (on average 1.51953125) internal successors, (778), 627 states have internal predecessors, (778), 39 states have call successors, (39), 13 states have call predecessors, (39), 17 states have return successors, (47), 40 states have call predecessors, (47), 39 states have call successors, (47) [2023-11-29 01:41:27,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 864 transitions. [2023-11-29 01:41:27,648 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 864 transitions. Word has length 133 [2023-11-29 01:41:27,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:41:27,649 INFO L495 AbstractCegarLoop]: Abstraction has 681 states and 864 transitions. [2023-11-29 01:41:27,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 5.882352941176471) internal successors, (100), 15 states have internal predecessors, (100), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-29 01:41:27,649 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 864 transitions. [2023-11-29 01:41:27,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-11-29 01:41:27,649 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:41:27,650 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:41:27,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2023-11-29 01:41:27,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2023-11-29 01:41:27,850 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting func_to_recursive_line_29_to_41_0Err23ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:41:27,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:41:27,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1343015606, now seen corresponding path program 1 times [2023-11-29 01:41:27,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:41:27,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323242730] [2023-11-29 01:41:27,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:41:27,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:41:27,869 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:41:27,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [209428689] [2023-11-29 01:41:27,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:41:27,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:41:27,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:41:27,871 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:41:27,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2023-11-29 01:41:28,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:41:28,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-29 01:41:28,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:41:28,103 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 [2023-11-29 01:41:28,106 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 [2023-11-29 01:41:28,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-11-29 01:41:29,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 01:41:29,060 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-29 01:41:29,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:41:29,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:41:29,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323242730] [2023-11-29 01:41:29,152 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:41:29,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209428689] [2023-11-29 01:41:29,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209428689] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:41:29,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:41:29,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-11-29 01:41:29,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275612402] [2023-11-29 01:41:29,153 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:41:29,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 01:41:29,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:41:29,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 01:41:29,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-11-29 01:41:29,154 INFO L87 Difference]: Start difference. First operand 681 states and 864 transitions. Second operand has 11 states, 9 states have (on average 10.88888888888889) internal successors, (98), 8 states have internal predecessors, (98), 3 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-29 01:41:33,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:41:37,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:41:41,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:41:46,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:41:50,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:41:50,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:41:50,250 INFO L93 Difference]: Finished difference Result 869 states and 928 transitions. [2023-11-29 01:41:50,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 01:41:50,251 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 10.88888888888889) internal successors, (98), 8 states have internal predecessors, (98), 3 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 134 [2023-11-29 01:41:50,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:41:50,252 INFO L225 Difference]: With dead ends: 869 [2023-11-29 01:41:50,252 INFO L226 Difference]: Without dead ends: 868 [2023-11-29 01:41:50,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 116 SyntacticMatches, 14 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-11-29 01:41:50,252 INFO L413 NwaCegarLoop]: 451 mSDtfsCounter, 541 mSDsluCounter, 2889 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 24 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 3340 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.9s IncrementalHoareTripleChecker+Time [2023-11-29 01:41:50,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 3340 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 713 Invalid, 5 Unknown, 0 Unchecked, 20.9s Time] [2023-11-29 01:41:50,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2023-11-29 01:41:50,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 681. [2023-11-29 01:41:50,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 512 states have (on average 1.517578125) internal successors, (777), 627 states have internal predecessors, (777), 39 states have call successors, (39), 13 states have call predecessors, (39), 17 states have return successors, (47), 40 states have call predecessors, (47), 39 states have call successors, (47) [2023-11-29 01:41:50,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 863 transitions. [2023-11-29 01:41:50,339 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 863 transitions. Word has length 134 [2023-11-29 01:41:50,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:41:50,339 INFO L495 AbstractCegarLoop]: Abstraction has 681 states and 863 transitions. [2023-11-29 01:41:50,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 10.88888888888889) internal successors, (98), 8 states have internal predecessors, (98), 3 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-29 01:41:50,339 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 863 transitions. [2023-11-29 01:41:50,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-29 01:41:50,340 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:41:50,340 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:41:50,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2023-11-29 01:41:50,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:41:50,541 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting func_to_recursive_line_29_to_41_0Err24ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:41:50,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:41:50,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1316189263, now seen corresponding path program 1 times [2023-11-29 01:41:50,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:41:50,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145051609] [2023-11-29 01:41:50,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:41:50,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:41:50,557 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:41:50,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1009890183] [2023-11-29 01:41:50,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:41:50,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:41:50,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:41:50,558 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:41:50,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2023-11-29 01:41:50,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:41:50,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-29 01:41:50,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:41:50,817 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 [2023-11-29 01:41:50,824 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 [2023-11-29 01:41:51,539 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 [2023-11-29 01:41:51,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-11-29 01:41:51,779 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 [2023-11-29 01:41:51,793 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-29 01:41:51,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:41:52,071 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-11-29 01:41:52,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:41:52,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145051609] [2023-11-29 01:41:52,071 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:41:52,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009890183] [2023-11-29 01:41:52,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009890183] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:41:52,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:41:52,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 17 [2023-11-29 01:41:52,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258600242] [2023-11-29 01:41:52,072 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:41:52,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 01:41:52,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:41:52,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 01:41:52,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-11-29 01:41:52,073 INFO L87 Difference]: Start difference. First operand 681 states and 863 transitions. Second operand has 18 states, 15 states have (on average 13.0) internal successors, (195), 14 states have internal predecessors, (195), 6 states have call successors, (20), 7 states have call predecessors, (20), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-29 01:41:56,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:42:00,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:42:04,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:42:09,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:42:13,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:42:17,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:42:21,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:42:21,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:42:21,480 INFO L93 Difference]: Finished difference Result 868 states and 927 transitions. [2023-11-29 01:42:21,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 01:42:21,481 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 13.0) internal successors, (195), 14 states have internal predecessors, (195), 6 states have call successors, (20), 7 states have call predecessors, (20), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 135 [2023-11-29 01:42:21,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:42:21,482 INFO L225 Difference]: With dead ends: 868 [2023-11-29 01:42:21,482 INFO L226 Difference]: Without dead ends: 867 [2023-11-29 01:42:21,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 238 SyntacticMatches, 14 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2023-11-29 01:42:21,483 INFO L413 NwaCegarLoop]: 436 mSDtfsCounter, 784 mSDsluCounter, 4117 mSDsCounter, 0 mSdLazyCounter, 1135 mSolverCounterSat, 40 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 790 SdHoareTripleChecker+Valid, 4553 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1135 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:42:21,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [790 Valid, 4553 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1135 Invalid, 7 Unknown, 0 Unchecked, 29.1s Time] [2023-11-29 01:42:21,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2023-11-29 01:42:21,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 681. [2023-11-29 01:42:21,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 512 states have (on average 1.515625) internal successors, (776), 627 states have internal predecessors, (776), 39 states have call successors, (39), 13 states have call predecessors, (39), 17 states have return successors, (47), 40 states have call predecessors, (47), 39 states have call successors, (47) [2023-11-29 01:42:21,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 862 transitions. [2023-11-29 01:42:21,581 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 862 transitions. Word has length 135 [2023-11-29 01:42:21,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:42:21,582 INFO L495 AbstractCegarLoop]: Abstraction has 681 states and 862 transitions. [2023-11-29 01:42:21,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 13.0) internal successors, (195), 14 states have internal predecessors, (195), 6 states have call successors, (20), 7 states have call predecessors, (20), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-29 01:42:21,582 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 862 transitions. [2023-11-29 01:42:21,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-29 01:42:21,583 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:42:21,583 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:42:21,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2023-11-29 01:42:21,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:42:21,783 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:42:21,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:42:21,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1633487231, now seen corresponding path program 1 times [2023-11-29 01:42:21,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:42:21,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408453308] [2023-11-29 01:42:21,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:42:21,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:42:21,801 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:42:21,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [265968224] [2023-11-29 01:42:21,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:42:21,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:42:21,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:42:21,802 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:42:21,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2023-11-29 01:42:22,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:42:22,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:42:22,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:42:22,094 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 [2023-11-29 01:42:22,101 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-11-29 01:42:22,101 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:42:22,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:42:22,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408453308] [2023-11-29 01:42:22,102 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:42:22,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265968224] [2023-11-29 01:42:22,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265968224] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:42:22,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:42:22,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:42:22,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916354156] [2023-11-29 01:42:22,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:42:22,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:42:22,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:42:22,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:42:22,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:42:22,103 INFO L87 Difference]: Start difference. First operand 681 states and 862 transitions. Second operand has 6 states, 5 states have (on average 19.8) internal successors, (99), 6 states have internal predecessors, (99), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:42:26,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:42:30,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:42:34,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:42:38,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:42:38,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:42:38,501 INFO L93 Difference]: Finished difference Result 689 states and 868 transitions. [2023-11-29 01:42:38,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:42:38,502 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 19.8) internal successors, (99), 6 states have internal predecessors, (99), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 135 [2023-11-29 01:42:38,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:42:38,502 INFO L225 Difference]: With dead ends: 689 [2023-11-29 01:42:38,502 INFO L226 Difference]: Without dead ends: 688 [2023-11-29 01:42:38,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:42:38,503 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 399 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 8 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:42:38,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 892 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 183 Invalid, 4 Unknown, 0 Unchecked, 16.3s Time] [2023-11-29 01:42:38,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2023-11-29 01:42:38,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 626. [2023-11-29 01:42:38,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 460 states have (on average 1.4608695652173913) internal successors, (672), 574 states have internal predecessors, (672), 36 states have call successors, (36), 14 states have call predecessors, (36), 18 states have return successors, (44), 37 states have call predecessors, (44), 36 states have call successors, (44) [2023-11-29 01:42:38,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 752 transitions. [2023-11-29 01:42:38,590 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 752 transitions. Word has length 135 [2023-11-29 01:42:38,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:42:38,590 INFO L495 AbstractCegarLoop]: Abstraction has 626 states and 752 transitions. [2023-11-29 01:42:38,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 19.8) internal successors, (99), 6 states have internal predecessors, (99), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:42:38,590 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 752 transitions. [2023-11-29 01:42:38,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-11-29 01:42:38,591 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:42:38,591 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:42:38,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2023-11-29 01:42:38,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:42:38,791 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting func_to_recursive_line_29_to_41_0Err25ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:42:38,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:42:38,792 INFO L85 PathProgramCache]: Analyzing trace with hash 2147161580, now seen corresponding path program 1 times [2023-11-29 01:42:38,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:42:38,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593783029] [2023-11-29 01:42:38,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:42:38,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:42:38,812 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:42:38,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [405343920] [2023-11-29 01:42:38,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:42:38,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:42:38,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:42:38,813 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:42:38,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2023-11-29 01:42:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:42:39,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-29 01:42:39,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:42:39,088 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 [2023-11-29 01:42:39,093 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 [2023-11-29 01:42:39,802 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 [2023-11-29 01:42:39,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-11-29 01:42:40,070 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 [2023-11-29 01:42:40,086 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-29 01:42:40,086 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:42:40,366 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-11-29 01:42:40,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:42:40,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593783029] [2023-11-29 01:42:40,367 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:42:40,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405343920] [2023-11-29 01:42:40,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405343920] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:42:40,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:42:40,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 17 [2023-11-29 01:42:40,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028686197] [2023-11-29 01:42:40,367 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:42:40,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 01:42:40,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:42:40,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 01:42:40,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-11-29 01:42:40,369 INFO L87 Difference]: Start difference. First operand 626 states and 752 transitions. Second operand has 18 states, 15 states have (on average 13.133333333333333) internal successors, (197), 14 states have internal predecessors, (197), 6 states have call successors, (20), 7 states have call predecessors, (20), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-29 01:42:41,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:42:41,398 INFO L93 Difference]: Finished difference Result 872 states and 929 transitions. [2023-11-29 01:42:41,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 01:42:41,399 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 13.133333333333333) internal successors, (197), 14 states have internal predecessors, (197), 6 states have call successors, (20), 7 states have call predecessors, (20), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 136 [2023-11-29 01:42:41,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:42:41,401 INFO L225 Difference]: With dead ends: 872 [2023-11-29 01:42:41,401 INFO L226 Difference]: Without dead ends: 871 [2023-11-29 01:42:41,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 240 SyntacticMatches, 14 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2023-11-29 01:42:41,402 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 910 mSDsluCounter, 2763 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 3000 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 01:42:41,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [916 Valid, 3000 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 01:42:41,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2023-11-29 01:42:41,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 626. [2023-11-29 01:42:41,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 460 states have (on average 1.458695652173913) internal successors, (671), 574 states have internal predecessors, (671), 36 states have call successors, (36), 14 states have call predecessors, (36), 18 states have return successors, (44), 37 states have call predecessors, (44), 36 states have call successors, (44) [2023-11-29 01:42:41,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 751 transitions. [2023-11-29 01:42:41,506 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 751 transitions. Word has length 136 [2023-11-29 01:42:41,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:42:41,506 INFO L495 AbstractCegarLoop]: Abstraction has 626 states and 751 transitions. [2023-11-29 01:42:41,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 13.133333333333333) internal successors, (197), 14 states have internal predecessors, (197), 6 states have call successors, (20), 7 states have call predecessors, (20), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-29 01:42:41,506 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 751 transitions. [2023-11-29 01:42:41,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-11-29 01:42:41,506 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:42:41,507 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:42:41,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2023-11-29 01:42:41,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:42:41,707 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:42:41,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:42:41,707 INFO L85 PathProgramCache]: Analyzing trace with hash 901503630, now seen corresponding path program 1 times [2023-11-29 01:42:41,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:42:41,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990222601] [2023-11-29 01:42:41,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:42:41,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:42:41,724 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:42:41,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2028277965] [2023-11-29 01:42:41,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:42:41,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:42:41,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:42:41,725 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:42:41,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2023-11-29 01:42:41,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:42:41,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:42:41,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:42:42,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 01:42:42,031 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-11-29 01:42:42,031 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:42:42,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:42:42,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990222601] [2023-11-29 01:42:42,031 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:42:42,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028277965] [2023-11-29 01:42:42,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028277965] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:42:42,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:42:42,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:42:42,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988655867] [2023-11-29 01:42:42,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:42:42,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:42:42,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:42:42,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:42:42,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:42:42,033 INFO L87 Difference]: Start difference. First operand 626 states and 751 transitions. Second operand has 6 states, 5 states have (on average 20.0) internal successors, (100), 6 states have internal predecessors, (100), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:42:46,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:42:50,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:42:54,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:42:58,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:42:58,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:42:58,449 INFO L93 Difference]: Finished difference Result 626 states and 751 transitions. [2023-11-29 01:42:58,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:42:58,450 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 20.0) internal successors, (100), 6 states have internal predecessors, (100), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 136 [2023-11-29 01:42:58,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:42:58,451 INFO L225 Difference]: With dead ends: 626 [2023-11-29 01:42:58,451 INFO L226 Difference]: Without dead ends: 625 [2023-11-29 01:42:58,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:42:58,452 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 279 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 8 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 947 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:42:58,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 947 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 184 Invalid, 4 Unknown, 0 Unchecked, 16.3s Time] [2023-11-29 01:42:58,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2023-11-29 01:42:58,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 625. [2023-11-29 01:42:58,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 460 states have (on average 1.4543478260869565) internal successors, (669), 573 states have internal predecessors, (669), 36 states have call successors, (36), 14 states have call predecessors, (36), 18 states have return successors, (44), 37 states have call predecessors, (44), 36 states have call successors, (44) [2023-11-29 01:42:58,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 749 transitions. [2023-11-29 01:42:58,542 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 749 transitions. Word has length 136 [2023-11-29 01:42:58,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:42:58,542 INFO L495 AbstractCegarLoop]: Abstraction has 625 states and 749 transitions. [2023-11-29 01:42:58,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 20.0) internal successors, (100), 6 states have internal predecessors, (100), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:42:58,543 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 749 transitions. [2023-11-29 01:42:58,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-29 01:42:58,543 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:42:58,543 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:42:58,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2023-11-29 01:42:58,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:42:58,744 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting func_to_recursive_line_29_to_41_0Err26ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:42:58,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:42:58,744 INFO L85 PathProgramCache]: Analyzing trace with hash 2137499633, now seen corresponding path program 1 times [2023-11-29 01:42:58,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:42:58,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094698871] [2023-11-29 01:42:58,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:42:58,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:42:58,761 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:42:58,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1506720129] [2023-11-29 01:42:58,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:42:58,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:42:58,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:42:58,762 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:42:58,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2023-11-29 01:42:59,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:42:59,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 114 conjunts are in the unsatisfiable core [2023-11-29 01:42:59,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:42:59,048 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 [2023-11-29 01:42:59,053 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 [2023-11-29 01:42:59,060 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 [2023-11-29 01:42:59,066 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 [2023-11-29 01:43:00,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-11-29 01:43:01,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-11-29 01:43:01,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:43:01,226 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 [2023-11-29 01:43:02,063 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 [2023-11-29 01:43:02,154 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:43:02,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2023-11-29 01:43:02,303 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 2 proven. 101 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-29 01:43:02,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:43:02,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:43:02,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094698871] [2023-11-29 01:43:02,589 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:43:02,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506720129] [2023-11-29 01:43:02,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506720129] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:43:02,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:43:02,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-11-29 01:43:02,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033144250] [2023-11-29 01:43:02,589 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:43:02,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 01:43:02,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:43:02,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 01:43:02,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2023-11-29 01:43:02,590 INFO L87 Difference]: Start difference. First operand 625 states and 749 transitions. Second operand has 20 states, 18 states have (on average 5.777777777777778) internal successors, (104), 16 states have internal predecessors, (104), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-29 01:43:05,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:43:05,847 INFO L93 Difference]: Finished difference Result 868 states and 925 transitions. [2023-11-29 01:43:05,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 01:43:05,848 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 5.777777777777778) internal successors, (104), 16 states have internal predecessors, (104), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 137 [2023-11-29 01:43:05,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:43:05,849 INFO L225 Difference]: With dead ends: 868 [2023-11-29 01:43:05,849 INFO L226 Difference]: Without dead ends: 867 [2023-11-29 01:43:05,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 113 SyntacticMatches, 12 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 01:43:05,849 INFO L413 NwaCegarLoop]: 391 mSDtfsCounter, 831 mSDsluCounter, 4160 mSDsCounter, 0 mSdLazyCounter, 1731 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 4551 SdHoareTripleChecker+Invalid, 1766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:43:05,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [841 Valid, 4551 Invalid, 1766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1731 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-29 01:43:05,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2023-11-29 01:43:05,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 625. [2023-11-29 01:43:05,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 460 states have (on average 1.4521739130434783) internal successors, (668), 573 states have internal predecessors, (668), 36 states have call successors, (36), 14 states have call predecessors, (36), 18 states have return successors, (44), 37 states have call predecessors, (44), 36 states have call successors, (44) [2023-11-29 01:43:05,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 748 transitions. [2023-11-29 01:43:05,964 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 748 transitions. Word has length 137 [2023-11-29 01:43:05,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:43:05,964 INFO L495 AbstractCegarLoop]: Abstraction has 625 states and 748 transitions. [2023-11-29 01:43:05,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 5.777777777777778) internal successors, (104), 16 states have internal predecessors, (104), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-29 01:43:05,964 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 748 transitions. [2023-11-29 01:43:05,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-29 01:43:05,965 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:43:05,965 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:43:05,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2023-11-29 01:43:06,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:43:06,165 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:43:06,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:43:06,166 INFO L85 PathProgramCache]: Analyzing trace with hash -2118158301, now seen corresponding path program 1 times [2023-11-29 01:43:06,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:43:06,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984599821] [2023-11-29 01:43:06,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:43:06,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:43:06,183 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:43:06,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [422032562] [2023-11-29 01:43:06,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:43:06,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:43:06,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:43:06,184 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:43:06,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2023-11-29 01:43:06,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:43:06,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 01:43:06,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:43:06,436 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 [2023-11-29 01:43:06,641 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-29 01:43:06,642 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:43:06,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:43:06,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984599821] [2023-11-29 01:43:06,642 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:43:06,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422032562] [2023-11-29 01:43:06,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422032562] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:43:06,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:43:06,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 01:43:06,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630877180] [2023-11-29 01:43:06,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:43:06,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:43:06,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:43:06,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:43:06,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:43:06,644 INFO L87 Difference]: Start difference. First operand 625 states and 748 transitions. Second operand has 7 states, 6 states have (on average 16.833333333333332) internal successors, (101), 7 states have internal predecessors, (101), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:43:07,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:43:07,033 INFO L93 Difference]: Finished difference Result 692 states and 780 transitions. [2023-11-29 01:43:07,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:43:07,034 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 16.833333333333332) internal successors, (101), 7 states have internal predecessors, (101), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 137 [2023-11-29 01:43:07,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:43:07,035 INFO L225 Difference]: With dead ends: 692 [2023-11-29 01:43:07,035 INFO L226 Difference]: Without dead ends: 691 [2023-11-29 01:43:07,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 127 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:43:07,035 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 356 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 38 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:43:07,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 1073 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 235 Invalid, 4 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:43:07,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2023-11-29 01:43:07,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 625. [2023-11-29 01:43:07,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 460 states have (on average 1.45) internal successors, (667), 573 states have internal predecessors, (667), 36 states have call successors, (36), 14 states have call predecessors, (36), 18 states have return successors, (44), 37 states have call predecessors, (44), 36 states have call successors, (44) [2023-11-29 01:43:07,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 747 transitions. [2023-11-29 01:43:07,128 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 747 transitions. Word has length 137 [2023-11-29 01:43:07,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:43:07,128 INFO L495 AbstractCegarLoop]: Abstraction has 625 states and 747 transitions. [2023-11-29 01:43:07,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 16.833333333333332) internal successors, (101), 7 states have internal predecessors, (101), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:43:07,129 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 747 transitions. [2023-11-29 01:43:07,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-29 01:43:07,129 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:43:07,129 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:43:07,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2023-11-29 01:43:07,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2023-11-29 01:43:07,330 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting func_to_recursive_line_29_to_41_0Err27ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:43:07,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:43:07,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1837979278, now seen corresponding path program 1 times [2023-11-29 01:43:07,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:43:07,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467170612] [2023-11-29 01:43:07,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:43:07,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:43:07,346 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:43:07,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [563261354] [2023-11-29 01:43:07,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:43:07,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:43:07,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:43:07,347 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:43:07,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2023-11-29 01:43:07,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:43:07,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 75 conjunts are in the unsatisfiable core [2023-11-29 01:43:07,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:43:07,615 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 [2023-11-29 01:43:07,624 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 [2023-11-29 01:43:07,629 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 [2023-11-29 01:43:08,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-11-29 01:43:08,768 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 [2023-11-29 01:43:08,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-11-29 01:43:09,215 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 [2023-11-29 01:43:09,280 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 [2023-11-29 01:43:09,319 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-29 01:43:09,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:43:09,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:43:09,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467170612] [2023-11-29 01:43:09,453 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:43:09,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563261354] [2023-11-29 01:43:09,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563261354] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:43:09,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:43:09,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-11-29 01:43:09,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536223870] [2023-11-29 01:43:09,453 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:43:09,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 01:43:09,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:43:09,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 01:43:09,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2023-11-29 01:43:09,454 INFO L87 Difference]: Start difference. First operand 625 states and 747 transitions. Second operand has 13 states, 11 states have (on average 9.272727272727273) internal successors, (102), 10 states have internal predecessors, (102), 3 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-29 01:43:13,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:43:17,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:43:21,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:43:26,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:43:30,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:43:34,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:43:38,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:43:39,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:43:39,036 INFO L93 Difference]: Finished difference Result 866 states and 923 transitions. [2023-11-29 01:43:39,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 01:43:39,037 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 9.272727272727273) internal successors, (102), 10 states have internal predecessors, (102), 3 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 138 [2023-11-29 01:43:39,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:43:39,038 INFO L225 Difference]: With dead ends: 866 [2023-11-29 01:43:39,038 INFO L226 Difference]: Without dead ends: 865 [2023-11-29 01:43:39,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 121 SyntacticMatches, 14 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2023-11-29 01:43:39,038 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 588 mSDsluCounter, 2915 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 25 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 3337 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:43:39,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [593 Valid, 3337 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 989 Invalid, 7 Unknown, 0 Unchecked, 29.3s Time] [2023-11-29 01:43:39,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2023-11-29 01:43:39,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 625. [2023-11-29 01:43:39,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 460 states have (on average 1.4478260869565218) internal successors, (666), 573 states have internal predecessors, (666), 36 states have call successors, (36), 14 states have call predecessors, (36), 18 states have return successors, (44), 37 states have call predecessors, (44), 36 states have call successors, (44) [2023-11-29 01:43:39,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 746 transitions. [2023-11-29 01:43:39,128 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 746 transitions. Word has length 138 [2023-11-29 01:43:39,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:43:39,129 INFO L495 AbstractCegarLoop]: Abstraction has 625 states and 746 transitions. [2023-11-29 01:43:39,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 9.272727272727273) internal successors, (102), 10 states have internal predecessors, (102), 3 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-29 01:43:39,129 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 746 transitions. [2023-11-29 01:43:39,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-29 01:43:39,129 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:43:39,129 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:43:39,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2023-11-29 01:43:39,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:43:39,330 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:43:39,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:43:39,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1238397648, now seen corresponding path program 1 times [2023-11-29 01:43:39,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:43:39,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564258232] [2023-11-29 01:43:39,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:43:39,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:43:39,350 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:43:39,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2086662221] [2023-11-29 01:43:39,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:43:39,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:43:39,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:43:39,351 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:43:39,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2023-11-29 01:43:39,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:43:39,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 01:43:39,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:43:39,595 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 [2023-11-29 01:43:39,783 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-29 01:43:39,783 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:43:39,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:43:39,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564258232] [2023-11-29 01:43:39,783 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:43:39,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086662221] [2023-11-29 01:43:39,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086662221] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:43:39,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:43:39,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 01:43:39,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855581533] [2023-11-29 01:43:39,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:43:39,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:43:39,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:43:39,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:43:39,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:43:39,785 INFO L87 Difference]: Start difference. First operand 625 states and 746 transitions. Second operand has 7 states, 6 states have (on average 17.0) internal successors, (102), 7 states have internal predecessors, (102), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:43:40,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:43:40,211 INFO L93 Difference]: Finished difference Result 691 states and 778 transitions. [2023-11-29 01:43:40,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:43:40,212 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 17.0) internal successors, (102), 7 states have internal predecessors, (102), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 138 [2023-11-29 01:43:40,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:43:40,213 INFO L225 Difference]: With dead ends: 691 [2023-11-29 01:43:40,213 INFO L226 Difference]: Without dead ends: 690 [2023-11-29 01:43:40,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 128 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:43:40,213 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 309 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 37 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 1159 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:43:40,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 1159 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 263 Invalid, 4 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:43:40,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2023-11-29 01:43:40,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 625. [2023-11-29 01:43:40,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 460 states have (on average 1.4456521739130435) internal successors, (665), 573 states have internal predecessors, (665), 36 states have call successors, (36), 14 states have call predecessors, (36), 18 states have return successors, (44), 37 states have call predecessors, (44), 36 states have call successors, (44) [2023-11-29 01:43:40,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 745 transitions. [2023-11-29 01:43:40,302 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 745 transitions. Word has length 138 [2023-11-29 01:43:40,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:43:40,302 INFO L495 AbstractCegarLoop]: Abstraction has 625 states and 745 transitions. [2023-11-29 01:43:40,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 17.0) internal successors, (102), 7 states have internal predecessors, (102), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:43:40,303 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 745 transitions. [2023-11-29 01:43:40,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-29 01:43:40,303 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:43:40,303 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:43:40,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2023-11-29 01:43:40,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:43:40,504 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting func_to_recursive_line_29_to_41_0Err28ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:43:40,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:43:40,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1142782867, now seen corresponding path program 1 times [2023-11-29 01:43:40,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:43:40,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792480600] [2023-11-29 01:43:40,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:43:40,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:43:40,520 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:43:40,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1565572104] [2023-11-29 01:43:40,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:43:40,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:43:40,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:43:40,521 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:43:40,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2023-11-29 01:43:40,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:43:40,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 01:43:40,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:43:40,792 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 [2023-11-29 01:43:41,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 01:43:41,351 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 [2023-11-29 01:43:41,362 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 96 proven. 1 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-29 01:43:41,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:43:41,600 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-11-29 01:43:41,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:43:41,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792480600] [2023-11-29 01:43:41,601 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:43:41,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565572104] [2023-11-29 01:43:41,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565572104] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:43:41,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:43:41,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 17 [2023-11-29 01:43:41,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395145008] [2023-11-29 01:43:41,601 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:43:41,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 01:43:41,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:43:41,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 01:43:41,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-11-29 01:43:41,603 INFO L87 Difference]: Start difference. First operand 625 states and 745 transitions. Second operand has 18 states, 15 states have (on average 13.533333333333333) internal successors, (203), 14 states have internal predecessors, (203), 6 states have call successors, (20), 7 states have call predecessors, (20), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-29 01:43:45,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:43:46,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:43:46,439 INFO L93 Difference]: Finished difference Result 690 states and 777 transitions. [2023-11-29 01:43:46,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 01:43:46,440 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 13.533333333333333) internal successors, (203), 14 states have internal predecessors, (203), 6 states have call successors, (20), 7 states have call predecessors, (20), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 139 [2023-11-29 01:43:46,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:43:46,441 INFO L225 Difference]: With dead ends: 690 [2023-11-29 01:43:46,441 INFO L226 Difference]: Without dead ends: 689 [2023-11-29 01:43:46,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 246 SyntacticMatches, 14 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2023-11-29 01:43:46,441 INFO L413 NwaCegarLoop]: 442 mSDtfsCounter, 797 mSDsluCounter, 2554 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 2996 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-11-29 01:43:46,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [802 Valid, 2996 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 627 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2023-11-29 01:43:46,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2023-11-29 01:43:46,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 624. [2023-11-29 01:43:46,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 460 states have (on average 1.4391304347826086) internal successors, (662), 572 states have internal predecessors, (662), 36 states have call successors, (36), 14 states have call predecessors, (36), 18 states have return successors, (44), 37 states have call predecessors, (44), 36 states have call successors, (44) [2023-11-29 01:43:46,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 742 transitions. [2023-11-29 01:43:46,532 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 742 transitions. Word has length 139 [2023-11-29 01:43:46,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:43:46,532 INFO L495 AbstractCegarLoop]: Abstraction has 624 states and 742 transitions. [2023-11-29 01:43:46,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 13.533333333333333) internal successors, (203), 14 states have internal predecessors, (203), 6 states have call successors, (20), 7 states have call predecessors, (20), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-29 01:43:46,532 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 742 transitions. [2023-11-29 01:43:46,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-29 01:43:46,533 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:43:46,533 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:43:46,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2023-11-29 01:43:46,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:43:46,733 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:43:46,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:43:46,733 INFO L85 PathProgramCache]: Analyzing trace with hash 264378821, now seen corresponding path program 1 times [2023-11-29 01:43:46,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:43:46,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487791280] [2023-11-29 01:43:46,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:43:46,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:43:46,750 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:43:46,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [940521812] [2023-11-29 01:43:46,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:43:46,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:43:46,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:43:46,752 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:43:46,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2023-11-29 01:43:46,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:43:46,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:43:46,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:43:47,098 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 [2023-11-29 01:43:47,107 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-29 01:43:47,107 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:43:47,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:43:47,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487791280] [2023-11-29 01:43:47,107 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:43:47,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940521812] [2023-11-29 01:43:47,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940521812] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:43:47,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:43:47,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:43:47,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495346315] [2023-11-29 01:43:47,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:43:47,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:43:47,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:43:47,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:43:47,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:43:47,109 INFO L87 Difference]: Start difference. First operand 624 states and 742 transitions. Second operand has 6 states, 5 states have (on average 20.6) internal successors, (103), 6 states have internal predecessors, (103), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:43:51,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:43:55,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:43:59,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:43:59,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:43:59,492 INFO L93 Difference]: Finished difference Result 632 states and 748 transitions. [2023-11-29 01:43:59,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:43:59,492 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 20.6) internal successors, (103), 6 states have internal predecessors, (103), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 139 [2023-11-29 01:43:59,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:43:59,493 INFO L225 Difference]: With dead ends: 632 [2023-11-29 01:43:59,493 INFO L226 Difference]: Without dead ends: 631 [2023-11-29 01:43:59,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 131 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:43:59,494 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 250 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 7 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:43:59,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 940 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 160 Invalid, 3 Unknown, 0 Unchecked, 12.2s Time] [2023-11-29 01:43:59,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2023-11-29 01:43:59,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 613. [2023-11-29 01:43:59,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 450 states have (on average 1.42) internal successors, (639), 561 states have internal predecessors, (639), 35 states have call successors, (35), 15 states have call predecessors, (35), 19 states have return successors, (43), 36 states have call predecessors, (43), 35 states have call successors, (43) [2023-11-29 01:43:59,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 717 transitions. [2023-11-29 01:43:59,589 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 717 transitions. Word has length 139 [2023-11-29 01:43:59,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:43:59,590 INFO L495 AbstractCegarLoop]: Abstraction has 613 states and 717 transitions. [2023-11-29 01:43:59,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 20.6) internal successors, (103), 6 states have internal predecessors, (103), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:43:59,590 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 717 transitions. [2023-11-29 01:43:59,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-11-29 01:43:59,590 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:43:59,590 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:43:59,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2023-11-29 01:43:59,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:43:59,791 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting func_to_recursive_line_29_to_41_0Err29ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:43:59,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:43:59,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1066530608, now seen corresponding path program 1 times [2023-11-29 01:43:59,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:43:59,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453745358] [2023-11-29 01:43:59,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:43:59,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:43:59,809 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:43:59,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2045471728] [2023-11-29 01:43:59,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:43:59,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:43:59,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:43:59,810 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:43:59,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2023-11-29 01:44:00,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:44:00,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 01:44:00,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:44:00,082 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 [2023-11-29 01:44:00,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-11-29 01:44:00,474 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 [2023-11-29 01:44:00,691 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 [2023-11-29 01:44:00,712 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 2 proven. 104 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-29 01:44:00,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:44:00,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-11-29 01:44:01,180 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 15 proven. 44 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-11-29 01:44:01,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:44:01,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453745358] [2023-11-29 01:44:01,180 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:44:01,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045471728] [2023-11-29 01:44:01,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045471728] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:44:01,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:44:01,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 25 [2023-11-29 01:44:01,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540622602] [2023-11-29 01:44:01,181 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:44:01,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 01:44:01,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:44:01,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 01:44:01,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2023-11-29 01:44:01,182 INFO L87 Difference]: Start difference. First operand 613 states and 717 transitions. Second operand has 26 states, 23 states have (on average 9.173913043478262) internal successors, (211), 22 states have internal predecessors, (211), 10 states have call successors, (20), 7 states have call predecessors, (20), 5 states have return successors, (16), 4 states have call predecessors, (16), 6 states have call successors, (16) [2023-11-29 01:44:03,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:44:03,885 INFO L93 Difference]: Finished difference Result 901 states and 929 transitions. [2023-11-29 01:44:03,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-29 01:44:03,886 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 9.173913043478262) internal successors, (211), 22 states have internal predecessors, (211), 10 states have call successors, (20), 7 states have call predecessors, (20), 5 states have return successors, (16), 4 states have call predecessors, (16), 6 states have call successors, (16) Word has length 140 [2023-11-29 01:44:03,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:44:03,886 INFO L225 Difference]: With dead ends: 901 [2023-11-29 01:44:03,886 INFO L226 Difference]: Without dead ends: 900 [2023-11-29 01:44:03,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 243 SyntacticMatches, 12 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=443, Invalid=2209, Unknown=0, NotChecked=0, Total=2652 [2023-11-29 01:44:03,887 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 1569 mSDsluCounter, 3057 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1575 SdHoareTripleChecker+Valid, 3290 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-29 01:44:03,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1575 Valid, 3290 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-29 01:44:03,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2023-11-29 01:44:03,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 613. [2023-11-29 01:44:03,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 450 states have (on average 1.4155555555555555) internal successors, (637), 561 states have internal predecessors, (637), 35 states have call successors, (35), 15 states have call predecessors, (35), 19 states have return successors, (43), 36 states have call predecessors, (43), 35 states have call successors, (43) [2023-11-29 01:44:03,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 715 transitions. [2023-11-29 01:44:03,980 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 715 transitions. Word has length 140 [2023-11-29 01:44:03,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:44:03,981 INFO L495 AbstractCegarLoop]: Abstraction has 613 states and 715 transitions. [2023-11-29 01:44:03,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 9.173913043478262) internal successors, (211), 22 states have internal predecessors, (211), 10 states have call successors, (20), 7 states have call predecessors, (20), 5 states have return successors, (16), 4 states have call predecessors, (16), 6 states have call successors, (16) [2023-11-29 01:44:03,981 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 715 transitions. [2023-11-29 01:44:03,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-11-29 01:44:03,981 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:44:03,981 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:44:03,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2023-11-29 01:44:04,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:44:04,182 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:44:04,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:44:04,182 INFO L85 PathProgramCache]: Analyzing trace with hash -394190894, now seen corresponding path program 1 times [2023-11-29 01:44:04,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:44:04,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570306993] [2023-11-29 01:44:04,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:44:04,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:44:04,197 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:44:04,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1282904772] [2023-11-29 01:44:04,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:44:04,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:44:04,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:44:04,198 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:44:04,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2023-11-29 01:44:04,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:44:04,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:44:04,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:44:04,523 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 [2023-11-29 01:44:04,533 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-29 01:44:04,533 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:44:04,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:44:04,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570306993] [2023-11-29 01:44:04,533 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:44:04,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282904772] [2023-11-29 01:44:04,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282904772] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:44:04,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:44:04,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:44:04,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808227687] [2023-11-29 01:44:04,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:44:04,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:44:04,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:44:04,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:44:04,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:44:04,535 INFO L87 Difference]: Start difference. First operand 613 states and 715 transitions. Second operand has 6 states, 5 states have (on average 20.8) internal successors, (104), 6 states have internal predecessors, (104), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:44:08,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:44:12,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:44:16,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:44:16,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:44:16,903 INFO L93 Difference]: Finished difference Result 613 states and 715 transitions. [2023-11-29 01:44:16,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:44:16,903 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 20.8) internal successors, (104), 6 states have internal predecessors, (104), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 140 [2023-11-29 01:44:16,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:44:16,904 INFO L225 Difference]: With dead ends: 613 [2023-11-29 01:44:16,904 INFO L226 Difference]: Without dead ends: 612 [2023-11-29 01:44:16,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:44:16,904 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 246 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 8 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:44:16,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 940 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 160 Invalid, 3 Unknown, 0 Unchecked, 12.2s Time] [2023-11-29 01:44:16,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2023-11-29 01:44:16,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 612. [2023-11-29 01:44:16,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 450 states have (on average 1.4111111111111112) internal successors, (635), 560 states have internal predecessors, (635), 35 states have call successors, (35), 15 states have call predecessors, (35), 19 states have return successors, (43), 36 states have call predecessors, (43), 35 states have call successors, (43) [2023-11-29 01:44:16,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 713 transitions. [2023-11-29 01:44:16,999 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 713 transitions. Word has length 140 [2023-11-29 01:44:16,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:44:16,999 INFO L495 AbstractCegarLoop]: Abstraction has 612 states and 713 transitions. [2023-11-29 01:44:16,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 20.8) internal successors, (104), 6 states have internal predecessors, (104), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:44:16,999 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 713 transitions. [2023-11-29 01:44:17,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-11-29 01:44:17,000 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:44:17,000 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:44:17,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2023-11-29 01:44:17,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2023-11-29 01:44:17,200 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting func_to_recursive_line_29_to_41_0Err30ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:44:17,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:44:17,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1297289419, now seen corresponding path program 1 times [2023-11-29 01:44:17,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:44:17,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660243067] [2023-11-29 01:44:17,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:44:17,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:44:17,217 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:44:17,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [887998466] [2023-11-29 01:44:17,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:44:17,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:44:17,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:44:17,218 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:44:17,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2023-11-29 01:44:17,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:44:17,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 01:44:17,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:44:17,522 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 [2023-11-29 01:44:17,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-11-29 01:44:17,866 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 [2023-11-29 01:44:18,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 01:44:18,108 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 2 proven. 105 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-29 01:44:18,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:44:18,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:44:18,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660243067] [2023-11-29 01:44:18,348 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:44:18,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887998466] [2023-11-29 01:44:18,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887998466] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:44:18,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:44:18,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-11-29 01:44:18,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489473379] [2023-11-29 01:44:18,349 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:44:18,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 01:44:18,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:44:18,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 01:44:18,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2023-11-29 01:44:18,350 INFO L87 Difference]: Start difference. First operand 612 states and 713 transitions. Second operand has 16 states, 14 states have (on average 7.714285714285714) internal successors, (108), 13 states have internal predecessors, (108), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-29 01:44:22,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:44:26,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:44:27,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:44:27,919 INFO L93 Difference]: Finished difference Result 863 states and 916 transitions. [2023-11-29 01:44:27,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 01:44:27,920 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 7.714285714285714) internal successors, (108), 13 states have internal predecessors, (108), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 141 [2023-11-29 01:44:27,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:44:27,921 INFO L225 Difference]: With dead ends: 863 [2023-11-29 01:44:27,921 INFO L226 Difference]: Without dead ends: 861 [2023-11-29 01:44:27,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 126 SyntacticMatches, 12 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 01:44:27,922 INFO L413 NwaCegarLoop]: 436 mSDtfsCounter, 609 mSDsluCounter, 4518 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 34 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 4954 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:44:27,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [619 Valid, 4954 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1101 Invalid, 2 Unknown, 0 Unchecked, 9.1s Time] [2023-11-29 01:44:27,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2023-11-29 01:44:28,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 612. [2023-11-29 01:44:28,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 450 states have (on average 1.4066666666666667) internal successors, (633), 560 states have internal predecessors, (633), 35 states have call successors, (35), 15 states have call predecessors, (35), 19 states have return successors, (43), 36 states have call predecessors, (43), 35 states have call successors, (43) [2023-11-29 01:44:28,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 711 transitions. [2023-11-29 01:44:28,020 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 711 transitions. Word has length 141 [2023-11-29 01:44:28,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:44:28,021 INFO L495 AbstractCegarLoop]: Abstraction has 612 states and 711 transitions. [2023-11-29 01:44:28,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 7.714285714285714) internal successors, (108), 13 states have internal predecessors, (108), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-29 01:44:28,021 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 711 transitions. [2023-11-29 01:44:28,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-11-29 01:44:28,021 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:44:28,021 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:44:28,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2023-11-29 01:44:28,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:44:28,222 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr38ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:44:28,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:44:28,222 INFO L85 PathProgramCache]: Analyzing trace with hash 664984423, now seen corresponding path program 1 times [2023-11-29 01:44:28,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:44:28,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925334376] [2023-11-29 01:44:28,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:44:28,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:44:28,237 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:44:28,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [337074139] [2023-11-29 01:44:28,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:44:28,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:44:28,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:44:28,239 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:44:28,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2023-11-29 01:44:28,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:44:28,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 01:44:28,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:44:28,493 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 [2023-11-29 01:44:28,497 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 [2023-11-29 01:44:28,952 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 [2023-11-29 01:44:28,964 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-29 01:44:28,964 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:44:28,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:44:28,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925334376] [2023-11-29 01:44:28,965 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:44:28,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337074139] [2023-11-29 01:44:28,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337074139] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:44:28,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:44:28,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 01:44:28,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672623999] [2023-11-29 01:44:28,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:44:28,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:44:28,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:44:28,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:44:28,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:44:28,966 INFO L87 Difference]: Start difference. First operand 612 states and 711 transitions. Second operand has 7 states, 6 states have (on average 17.5) internal successors, (105), 7 states have internal predecessors, (105), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:44:29,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:44:29,537 INFO L93 Difference]: Finished difference Result 675 states and 743 transitions. [2023-11-29 01:44:29,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:44:29,538 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 17.5) internal successors, (105), 7 states have internal predecessors, (105), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 141 [2023-11-29 01:44:29,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:44:29,539 INFO L225 Difference]: With dead ends: 675 [2023-11-29 01:44:29,539 INFO L226 Difference]: Without dead ends: 674 [2023-11-29 01:44:29,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 131 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:44:29,539 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 365 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 1093 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:44:29,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 1093 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:44:29,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2023-11-29 01:44:29,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 612. [2023-11-29 01:44:29,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 450 states have (on average 1.4044444444444444) internal successors, (632), 560 states have internal predecessors, (632), 35 states have call successors, (35), 15 states have call predecessors, (35), 19 states have return successors, (43), 36 states have call predecessors, (43), 35 states have call successors, (43) [2023-11-29 01:44:29,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 710 transitions. [2023-11-29 01:44:29,632 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 710 transitions. Word has length 141 [2023-11-29 01:44:29,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:44:29,633 INFO L495 AbstractCegarLoop]: Abstraction has 612 states and 710 transitions. [2023-11-29 01:44:29,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 17.5) internal successors, (105), 7 states have internal predecessors, (105), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:44:29,633 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 710 transitions. [2023-11-29 01:44:29,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-11-29 01:44:29,636 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:44:29,636 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:44:29,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2023-11-29 01:44:29,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2023-11-29 01:44:29,837 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting func_to_recursive_line_29_to_41_0Err31ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:44:29,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:44:29,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1561266222, now seen corresponding path program 1 times [2023-11-29 01:44:29,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:44:29,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830592200] [2023-11-29 01:44:29,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:44:29,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:44:29,853 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:44:29,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [472559044] [2023-11-29 01:44:29,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:44:29,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:44:29,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:44:29,854 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:44:29,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2023-11-29 01:44:30,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:44:30,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 91 conjunts are in the unsatisfiable core [2023-11-29 01:44:30,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:44:30,134 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 [2023-11-29 01:44:30,138 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 [2023-11-29 01:44:30,144 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 [2023-11-29 01:44:31,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-11-29 01:44:31,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-11-29 01:44:31,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-11-29 01:44:32,247 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 [2023-11-29 01:44:32,342 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 [2023-11-29 01:44:32,414 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 [2023-11-29 01:44:32,472 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-29 01:44:32,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:44:32,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:44:32,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830592200] [2023-11-29 01:44:32,693 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:44:32,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472559044] [2023-11-29 01:44:32,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472559044] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:44:32,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:44:32,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-11-29 01:44:32,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501939898] [2023-11-29 01:44:32,693 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:44:32,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 01:44:32,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:44:32,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 01:44:32,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2023-11-29 01:44:32,694 INFO L87 Difference]: Start difference. First operand 612 states and 710 transitions. Second operand has 15 states, 13 states have (on average 8.153846153846153) internal successors, (106), 12 states have internal predecessors, (106), 3 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-29 01:44:36,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:44:41,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:44:45,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:44:50,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:44:50,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:44:50,725 INFO L93 Difference]: Finished difference Result 860 states and 913 transitions. [2023-11-29 01:44:50,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 01:44:50,726 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 8.153846153846153) internal successors, (106), 12 states have internal predecessors, (106), 3 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 142 [2023-11-29 01:44:50,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:44:50,727 INFO L225 Difference]: With dead ends: 860 [2023-11-29 01:44:50,727 INFO L226 Difference]: Without dead ends: 858 [2023-11-29 01:44:50,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 126 SyntacticMatches, 14 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2023-11-29 01:44:50,728 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 555 mSDsluCounter, 3472 mSDsCounter, 0 mSdLazyCounter, 1317 mSolverCounterSat, 27 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 3876 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1317 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:44:50,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 3876 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1317 Invalid, 4 Unknown, 0 Unchecked, 17.5s Time] [2023-11-29 01:44:50,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2023-11-29 01:44:50,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 612. [2023-11-29 01:44:50,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 450 states have (on average 1.4) internal successors, (630), 560 states have internal predecessors, (630), 35 states have call successors, (35), 15 states have call predecessors, (35), 19 states have return successors, (43), 36 states have call predecessors, (43), 35 states have call successors, (43) [2023-11-29 01:44:50,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 708 transitions. [2023-11-29 01:44:50,834 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 708 transitions. Word has length 142 [2023-11-29 01:44:50,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:44:50,834 INFO L495 AbstractCegarLoop]: Abstraction has 612 states and 708 transitions. [2023-11-29 01:44:50,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 8.153846153846153) internal successors, (106), 12 states have internal predecessors, (106), 3 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-29 01:44:50,834 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 708 transitions. [2023-11-29 01:44:50,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-11-29 01:44:50,835 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:44:50,835 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:44:50,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2023-11-29 01:44:51,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2023-11-29 01:44:51,035 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr39ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:44:51,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:44:51,036 INFO L85 PathProgramCache]: Analyzing trace with hash -860319116, now seen corresponding path program 1 times [2023-11-29 01:44:51,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:44:51,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41881840] [2023-11-29 01:44:51,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:44:51,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:44:51,050 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:44:51,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [405295132] [2023-11-29 01:44:51,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:44:51,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:44:51,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:44:51,052 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:44:51,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2023-11-29 01:44:51,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:44:51,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 01:44:51,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:44:51,317 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 [2023-11-29 01:44:51,321 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 [2023-11-29 01:44:51,734 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 [2023-11-29 01:44:51,749 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-29 01:44:51,749 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:44:51,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:44:51,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41881840] [2023-11-29 01:44:51,750 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:44:51,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405295132] [2023-11-29 01:44:51,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405295132] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:44:51,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:44:51,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 01:44:51,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463683765] [2023-11-29 01:44:51,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:44:51,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:44:51,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:44:51,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:44:51,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:44:51,751 INFO L87 Difference]: Start difference. First operand 612 states and 708 transitions. Second operand has 7 states, 6 states have (on average 17.666666666666668) internal successors, (106), 7 states have internal predecessors, (106), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:44:52,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:44:52,327 INFO L93 Difference]: Finished difference Result 674 states and 740 transitions. [2023-11-29 01:44:52,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:44:52,328 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 17.666666666666668) internal successors, (106), 7 states have internal predecessors, (106), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 142 [2023-11-29 01:44:52,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:44:52,329 INFO L225 Difference]: With dead ends: 674 [2023-11-29 01:44:52,329 INFO L226 Difference]: Without dead ends: 673 [2023-11-29 01:44:52,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 132 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:44:52,329 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 266 mSDsluCounter, 1051 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 37 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 1280 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:44:52,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 1280 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 341 Invalid, 1 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:44:52,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2023-11-29 01:44:52,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 612. [2023-11-29 01:44:52,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 450 states have (on average 1.3977777777777778) internal successors, (629), 560 states have internal predecessors, (629), 35 states have call successors, (35), 15 states have call predecessors, (35), 19 states have return successors, (43), 36 states have call predecessors, (43), 35 states have call successors, (43) [2023-11-29 01:44:52,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 707 transitions. [2023-11-29 01:44:52,422 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 707 transitions. Word has length 142 [2023-11-29 01:44:52,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:44:52,423 INFO L495 AbstractCegarLoop]: Abstraction has 612 states and 707 transitions. [2023-11-29 01:44:52,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 17.666666666666668) internal successors, (106), 7 states have internal predecessors, (106), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:44:52,423 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 707 transitions. [2023-11-29 01:44:52,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-11-29 01:44:52,424 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:44:52,424 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:44:52,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2023-11-29 01:44:52,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2023-11-29 01:44:52,624 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:44:52,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:44:52,625 INFO L85 PathProgramCache]: Analyzing trace with hash -900088567, now seen corresponding path program 1 times [2023-11-29 01:44:52,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:44:52,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509826712] [2023-11-29 01:44:52,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:44:52,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:44:52,640 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:44:52,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [289684129] [2023-11-29 01:44:52,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:44:52,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:44:52,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:44:52,641 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:44:52,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2023-11-29 01:44:52,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:44:52,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 01:44:52,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:44:52,908 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 [2023-11-29 01:44:52,912 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 [2023-11-29 01:44:53,417 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-29 01:44:53,417 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:44:53,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:44:53,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509826712] [2023-11-29 01:44:53,418 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:44:53,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289684129] [2023-11-29 01:44:53,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289684129] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:44:53,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:44:53,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 01:44:53,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405281380] [2023-11-29 01:44:53,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:44:53,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 01:44:53,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:44:53,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 01:44:53,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:44:53,419 INFO L87 Difference]: Start difference. First operand 612 states and 707 transitions. Second operand has 8 states, 7 states have (on average 15.285714285714286) internal successors, (107), 8 states have internal predecessors, (107), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:44:54,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:44:54,082 INFO L93 Difference]: Finished difference Result 673 states and 739 transitions. [2023-11-29 01:44:54,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:44:54,083 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 15.285714285714286) internal successors, (107), 8 states have internal predecessors, (107), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 143 [2023-11-29 01:44:54,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:44:54,084 INFO L225 Difference]: With dead ends: 673 [2023-11-29 01:44:54,084 INFO L226 Difference]: Without dead ends: 671 [2023-11-29 01:44:54,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 132 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:44:54,084 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 263 mSDsluCounter, 1280 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 38 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 1511 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:44:54,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 1511 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 399 Invalid, 1 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 01:44:54,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2023-11-29 01:44:54,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 612. [2023-11-29 01:44:54,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 450 states have (on average 1.3933333333333333) internal successors, (627), 560 states have internal predecessors, (627), 35 states have call successors, (35), 15 states have call predecessors, (35), 19 states have return successors, (43), 36 states have call predecessors, (43), 35 states have call successors, (43) [2023-11-29 01:44:54,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 705 transitions. [2023-11-29 01:44:54,180 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 705 transitions. Word has length 143 [2023-11-29 01:44:54,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:44:54,180 INFO L495 AbstractCegarLoop]: Abstraction has 612 states and 705 transitions. [2023-11-29 01:44:54,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 15.285714285714286) internal successors, (107), 8 states have internal predecessors, (107), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:44:54,180 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 705 transitions. [2023-11-29 01:44:54,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-29 01:44:54,181 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:44:54,181 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:44:54,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2023-11-29 01:44:54,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:44:54,382 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:44:54,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:44:54,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1696678229, now seen corresponding path program 1 times [2023-11-29 01:44:54,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:44:54,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007161363] [2023-11-29 01:44:54,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:44:54,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:44:54,398 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:44:54,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [42695153] [2023-11-29 01:44:54,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:44:54,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:44:54,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:44:54,399 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:44:54,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2023-11-29 01:44:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:44:54,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:44:54,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:44:54,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:44:54,902 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-29 01:44:54,902 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:44:54,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:44:54,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007161363] [2023-11-29 01:44:54,903 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:44:54,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42695153] [2023-11-29 01:44:54,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42695153] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:44:54,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:44:54,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:44:54,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921299903] [2023-11-29 01:44:54,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:44:54,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:44:54,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:44:54,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:44:54,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:44:54,904 INFO L87 Difference]: Start difference. First operand 612 states and 705 transitions. Second operand has 6 states, 5 states have (on average 21.8) internal successors, (109), 6 states have internal predecessors, (109), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:44:55,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:44:55,276 INFO L93 Difference]: Finished difference Result 671 states and 737 transitions. [2023-11-29 01:44:55,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:44:55,276 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 21.8) internal successors, (109), 6 states have internal predecessors, (109), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 145 [2023-11-29 01:44:55,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:44:55,277 INFO L225 Difference]: With dead ends: 671 [2023-11-29 01:44:55,277 INFO L226 Difference]: Without dead ends: 670 [2023-11-29 01:44:55,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 136 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:44:55,278 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 216 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 1144 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:44:55,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 1144 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:44:55,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2023-11-29 01:44:55,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 612. [2023-11-29 01:44:55,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 450 states have (on average 1.3911111111111112) internal successors, (626), 560 states have internal predecessors, (626), 35 states have call successors, (35), 15 states have call predecessors, (35), 19 states have return successors, (43), 36 states have call predecessors, (43), 35 states have call successors, (43) [2023-11-29 01:44:55,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 704 transitions. [2023-11-29 01:44:55,382 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 704 transitions. Word has length 145 [2023-11-29 01:44:55,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:44:55,383 INFO L495 AbstractCegarLoop]: Abstraction has 612 states and 704 transitions. [2023-11-29 01:44:55,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 21.8) internal successors, (109), 6 states have internal predecessors, (109), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:44:55,383 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 704 transitions. [2023-11-29 01:44:55,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-11-29 01:44:55,383 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:44:55,384 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:44:55,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2023-11-29 01:44:55,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:44:55,584 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:44:55,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:44:55,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1057417288, now seen corresponding path program 1 times [2023-11-29 01:44:55,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:44:55,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479691649] [2023-11-29 01:44:55,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:44:55,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:44:55,602 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:44:55,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1849166098] [2023-11-29 01:44:55,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:44:55,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:44:55,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:44:55,603 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:44:55,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2023-11-29 01:44:55,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:44:55,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:44:55,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:44:55,879 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 [2023-11-29 01:44:56,084 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-29 01:44:56,084 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:44:56,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:44:56,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479691649] [2023-11-29 01:44:56,084 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:44:56,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849166098] [2023-11-29 01:44:56,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849166098] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:44:56,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:44:56,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:44:56,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447617773] [2023-11-29 01:44:56,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:44:56,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:44:56,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:44:56,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:44:56,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:44:56,086 INFO L87 Difference]: Start difference. First operand 612 states and 704 transitions. Second operand has 6 states, 5 states have (on average 22.0) internal successors, (110), 6 states have internal predecessors, (110), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:44:56,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:44:56,455 INFO L93 Difference]: Finished difference Result 670 states and 736 transitions. [2023-11-29 01:44:56,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:44:56,455 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 22.0) internal successors, (110), 6 states have internal predecessors, (110), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 146 [2023-11-29 01:44:56,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:44:56,456 INFO L225 Difference]: With dead ends: 670 [2023-11-29 01:44:56,456 INFO L226 Difference]: Without dead ends: 669 [2023-11-29 01:44:56,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 137 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:44:56,457 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 213 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:44:56,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 1146 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:44:56,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2023-11-29 01:44:56,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 612. [2023-11-29 01:44:56,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 450 states have (on average 1.3888888888888888) internal successors, (625), 560 states have internal predecessors, (625), 35 states have call successors, (35), 15 states have call predecessors, (35), 19 states have return successors, (43), 36 states have call predecessors, (43), 35 states have call successors, (43) [2023-11-29 01:44:56,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 703 transitions. [2023-11-29 01:44:56,551 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 703 transitions. Word has length 146 [2023-11-29 01:44:56,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:44:56,551 INFO L495 AbstractCegarLoop]: Abstraction has 612 states and 703 transitions. [2023-11-29 01:44:56,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 22.0) internal successors, (110), 6 states have internal predecessors, (110), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:44:56,551 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 703 transitions. [2023-11-29 01:44:56,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-11-29 01:44:56,552 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:44:56,552 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:44:56,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2023-11-29 01:44:56,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2023-11-29 01:44:56,752 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:44:56,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:44:56,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1579802701, now seen corresponding path program 1 times [2023-11-29 01:44:56,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:44:56,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568507380] [2023-11-29 01:44:56,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:44:56,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:44:56,773 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:44:56,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [201288458] [2023-11-29 01:44:56,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:44:56,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:44:56,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:44:56,774 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:44:56,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2023-11-29 01:44:57,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:44:57,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 01:44:57,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:44:57,038 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 [2023-11-29 01:44:57,267 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-29 01:44:57,267 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:44:57,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:44:57,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568507380] [2023-11-29 01:44:57,267 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:44:57,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201288458] [2023-11-29 01:44:57,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201288458] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:44:57,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:44:57,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 01:44:57,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724696955] [2023-11-29 01:44:57,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:44:57,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:44:57,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:44:57,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:44:57,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:44:57,268 INFO L87 Difference]: Start difference. First operand 612 states and 703 transitions. Second operand has 7 states, 6 states have (on average 18.5) internal successors, (111), 7 states have internal predecessors, (111), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:44:57,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:44:57,944 INFO L93 Difference]: Finished difference Result 669 states and 735 transitions. [2023-11-29 01:44:57,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:44:57,945 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 18.5) internal successors, (111), 7 states have internal predecessors, (111), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 147 [2023-11-29 01:44:57,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:44:57,945 INFO L225 Difference]: With dead ends: 669 [2023-11-29 01:44:57,945 INFO L226 Difference]: Without dead ends: 668 [2023-11-29 01:44:57,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 137 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:44:57,946 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 319 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 1024 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 01:44:57,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 1024 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 01:44:57,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2023-11-29 01:44:58,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 612. [2023-11-29 01:44:58,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 450 states have (on average 1.3866666666666667) internal successors, (624), 560 states have internal predecessors, (624), 35 states have call successors, (35), 15 states have call predecessors, (35), 19 states have return successors, (43), 36 states have call predecessors, (43), 35 states have call successors, (43) [2023-11-29 01:44:58,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 702 transitions. [2023-11-29 01:44:58,039 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 702 transitions. Word has length 147 [2023-11-29 01:44:58,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:44:58,039 INFO L495 AbstractCegarLoop]: Abstraction has 612 states and 702 transitions. [2023-11-29 01:44:58,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 18.5) internal successors, (111), 7 states have internal predecessors, (111), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:44:58,039 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 702 transitions. [2023-11-29 01:44:58,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-11-29 01:44:58,040 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:44:58,040 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:44:58,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2023-11-29 01:44:58,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2023-11-29 01:44:58,240 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr45ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:44:58,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:44:58,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1729243738, now seen corresponding path program 1 times [2023-11-29 01:44:58,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:44:58,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046176857] [2023-11-29 01:44:58,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:44:58,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:44:58,258 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:44:58,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [403400158] [2023-11-29 01:44:58,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:44:58,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:44:58,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:44:58,259 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:44:58,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2023-11-29 01:44:58,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:44:58,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 01:44:58,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:44:58,533 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 [2023-11-29 01:44:58,757 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-29 01:44:58,757 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:44:58,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:44:58,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046176857] [2023-11-29 01:44:58,757 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:44:58,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403400158] [2023-11-29 01:44:58,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403400158] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:44:58,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:44:58,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:44:58,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469368811] [2023-11-29 01:44:58,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:44:58,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:44:58,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:44:58,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:44:58,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:44:58,759 INFO L87 Difference]: Start difference. First operand 612 states and 702 transitions. Second operand has 6 states, 5 states have (on average 22.4) internal successors, (112), 6 states have internal predecessors, (112), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:44:59,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:44:59,204 INFO L93 Difference]: Finished difference Result 668 states and 734 transitions. [2023-11-29 01:44:59,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:44:59,204 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 22.4) internal successors, (112), 6 states have internal predecessors, (112), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 148 [2023-11-29 01:44:59,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:44:59,205 INFO L225 Difference]: With dead ends: 668 [2023-11-29 01:44:59,205 INFO L226 Difference]: Without dead ends: 667 [2023-11-29 01:44:59,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 139 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:44:59,206 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 289 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 939 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:44:59,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 939 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:44:59,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2023-11-29 01:44:59,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 612. [2023-11-29 01:44:59,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 450 states have (on average 1.3844444444444444) internal successors, (623), 560 states have internal predecessors, (623), 35 states have call successors, (35), 15 states have call predecessors, (35), 19 states have return successors, (43), 36 states have call predecessors, (43), 35 states have call successors, (43) [2023-11-29 01:44:59,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 701 transitions. [2023-11-29 01:44:59,304 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 701 transitions. Word has length 148 [2023-11-29 01:44:59,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:44:59,304 INFO L495 AbstractCegarLoop]: Abstraction has 612 states and 701 transitions. [2023-11-29 01:44:59,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 22.4) internal successors, (112), 6 states have internal predecessors, (112), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:44:59,304 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 701 transitions. [2023-11-29 01:44:59,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-11-29 01:44:59,305 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:44:59,305 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:44:59,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2023-11-29 01:44:59,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:44:59,506 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:44:59,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:44:59,506 INFO L85 PathProgramCache]: Analyzing trace with hash 2066948591, now seen corresponding path program 1 times [2023-11-29 01:44:59,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:44:59,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531903984] [2023-11-29 01:44:59,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:44:59,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:44:59,522 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:44:59,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [533640544] [2023-11-29 01:44:59,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:44:59,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:44:59,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:44:59,523 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:44:59,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2023-11-29 01:44:59,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:44:59,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:44:59,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:44:59,903 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 [2023-11-29 01:45:00,114 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-29 01:45:00,114 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:45:00,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:45:00,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531903984] [2023-11-29 01:45:00,115 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:45:00,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533640544] [2023-11-29 01:45:00,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533640544] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:45:00,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:45:00,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:45:00,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134916423] [2023-11-29 01:45:00,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:45:00,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:45:00,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:45:00,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:45:00,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:45:00,116 INFO L87 Difference]: Start difference. First operand 612 states and 701 transitions. Second operand has 6 states, 5 states have (on average 22.6) internal successors, (113), 6 states have internal predecessors, (113), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:45:00,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:45:00,504 INFO L93 Difference]: Finished difference Result 667 states and 733 transitions. [2023-11-29 01:45:00,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:45:00,505 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 22.6) internal successors, (113), 6 states have internal predecessors, (113), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 149 [2023-11-29 01:45:00,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:45:00,506 INFO L225 Difference]: With dead ends: 667 [2023-11-29 01:45:00,506 INFO L226 Difference]: Without dead ends: 666 [2023-11-29 01:45:00,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 140 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:45:00,506 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 283 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 39 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:45:00,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 944 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 174 Invalid, 4 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:45:00,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2023-11-29 01:45:00,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 612. [2023-11-29 01:45:00,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 450 states have (on average 1.3822222222222222) internal successors, (622), 560 states have internal predecessors, (622), 35 states have call successors, (35), 15 states have call predecessors, (35), 19 states have return successors, (43), 36 states have call predecessors, (43), 35 states have call successors, (43) [2023-11-29 01:45:00,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 700 transitions. [2023-11-29 01:45:00,602 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 700 transitions. Word has length 149 [2023-11-29 01:45:00,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:45:00,602 INFO L495 AbstractCegarLoop]: Abstraction has 612 states and 700 transitions. [2023-11-29 01:45:00,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 22.6) internal successors, (113), 6 states have internal predecessors, (113), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:45:00,602 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 700 transitions. [2023-11-29 01:45:00,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-11-29 01:45:00,603 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:45:00,603 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:45:00,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2023-11-29 01:45:00,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:45:00,803 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting func_to_recursive_line_29_to_41_0Err34ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:45:00,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:45:00,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1687893774, now seen corresponding path program 1 times [2023-11-29 01:45:00,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:45:00,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892170357] [2023-11-29 01:45:00,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:45:00,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:45:00,822 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:45:00,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1022500575] [2023-11-29 01:45:00,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:45:00,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:45:00,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:45:00,823 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:45:00,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2023-11-29 01:45:01,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:45:01,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 01:45:01,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:45:01,127 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 [2023-11-29 01:45:01,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-11-29 01:45:01,513 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 [2023-11-29 01:45:01,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-11-29 01:45:01,794 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 3 proven. 134 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-29 01:45:01,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:45:01,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:45:01,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892170357] [2023-11-29 01:45:01,878 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:45:01,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022500575] [2023-11-29 01:45:01,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022500575] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:45:01,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:45:01,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-11-29 01:45:01,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622406545] [2023-11-29 01:45:01,878 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:45:01,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 01:45:01,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:45:01,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 01:45:01,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2023-11-29 01:45:01,879 INFO L87 Difference]: Start difference. First operand 612 states and 700 transitions. Second operand has 15 states, 13 states have (on average 8.692307692307692) internal successors, (113), 12 states have internal predecessors, (113), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-29 01:45:05,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:45:10,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:45:11,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:45:11,321 INFO L93 Difference]: Finished difference Result 850 states and 903 transitions. [2023-11-29 01:45:11,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 01:45:11,322 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 8.692307692307692) internal successors, (113), 12 states have internal predecessors, (113), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 151 [2023-11-29 01:45:11,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:45:11,323 INFO L225 Difference]: With dead ends: 850 [2023-11-29 01:45:11,323 INFO L226 Difference]: Without dead ends: 849 [2023-11-29 01:45:11,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 124 SyntacticMatches, 14 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2023-11-29 01:45:11,323 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 547 mSDsluCounter, 3994 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 28 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 4415 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:45:11,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [557 Valid, 4415 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1000 Invalid, 2 Unknown, 0 Unchecked, 9.0s Time] [2023-11-29 01:45:11,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2023-11-29 01:45:11,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 612. [2023-11-29 01:45:11,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 450 states have (on average 1.38) internal successors, (621), 560 states have internal predecessors, (621), 35 states have call successors, (35), 15 states have call predecessors, (35), 19 states have return successors, (43), 36 states have call predecessors, (43), 35 states have call successors, (43) [2023-11-29 01:45:11,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 699 transitions. [2023-11-29 01:45:11,422 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 699 transitions. Word has length 151 [2023-11-29 01:45:11,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:45:11,422 INFO L495 AbstractCegarLoop]: Abstraction has 612 states and 699 transitions. [2023-11-29 01:45:11,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 8.692307692307692) internal successors, (113), 12 states have internal predecessors, (113), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-29 01:45:11,422 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 699 transitions. [2023-11-29 01:45:11,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-11-29 01:45:11,423 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:45:11,423 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:45:11,428 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2023-11-29 01:45:11,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2023-11-29 01:45:11,623 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr47ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:45:11,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:45:11,623 INFO L85 PathProgramCache]: Analyzing trace with hash -349102852, now seen corresponding path program 1 times [2023-11-29 01:45:11,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:45:11,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012177492] [2023-11-29 01:45:11,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:45:11,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:45:11,638 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:45:11,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1276343950] [2023-11-29 01:45:11,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:45:11,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:45:11,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:45:11,639 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:45:11,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2023-11-29 01:45:11,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:45:11,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:45:11,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:45:11,898 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 [2023-11-29 01:45:12,120 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-29 01:45:12,120 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:45:12,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:45:12,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012177492] [2023-11-29 01:45:12,120 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:45:12,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276343950] [2023-11-29 01:45:12,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276343950] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:45:12,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:45:12,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:45:12,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104921617] [2023-11-29 01:45:12,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:45:12,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:45:12,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:45:12,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:45:12,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:45:12,121 INFO L87 Difference]: Start difference. First operand 612 states and 699 transitions. Second operand has 6 states, 5 states have (on average 22.8) internal successors, (114), 6 states have internal predecessors, (114), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:45:12,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:45:12,519 INFO L93 Difference]: Finished difference Result 666 states and 731 transitions. [2023-11-29 01:45:12,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:45:12,519 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 22.8) internal successors, (114), 6 states have internal predecessors, (114), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 150 [2023-11-29 01:45:12,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:45:12,520 INFO L225 Difference]: With dead ends: 666 [2023-11-29 01:45:12,520 INFO L226 Difference]: Without dead ends: 665 [2023-11-29 01:45:12,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 141 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:45:12,521 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 279 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 39 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:45:12,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 946 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 172 Invalid, 4 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:45:12,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2023-11-29 01:45:12,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 612. [2023-11-29 01:45:12,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 450 states have (on average 1.3777777777777778) internal successors, (620), 560 states have internal predecessors, (620), 35 states have call successors, (35), 15 states have call predecessors, (35), 19 states have return successors, (43), 36 states have call predecessors, (43), 35 states have call successors, (43) [2023-11-29 01:45:12,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 698 transitions. [2023-11-29 01:45:12,651 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 698 transitions. Word has length 150 [2023-11-29 01:45:12,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:45:12,651 INFO L495 AbstractCegarLoop]: Abstraction has 612 states and 698 transitions. [2023-11-29 01:45:12,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 22.8) internal successors, (114), 6 states have internal predecessors, (114), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:45:12,651 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 698 transitions. [2023-11-29 01:45:12,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-11-29 01:45:12,652 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:45:12,652 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:45:12,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2023-11-29 01:45:12,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:45:12,852 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting func_to_recursive_line_29_to_41_0Err35ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:45:12,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:45:12,853 INFO L85 PathProgramCache]: Analyzing trace with hash 785099555, now seen corresponding path program 1 times [2023-11-29 01:45:12,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:45:12,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549071907] [2023-11-29 01:45:12,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:45:12,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:45:12,871 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:45:12,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1752761954] [2023-11-29 01:45:12,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:45:12,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:45:12,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:45:12,872 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:45:12,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2023-11-29 01:45:13,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:45:13,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 01:45:13,181 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:45:13,185 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 [2023-11-29 01:45:13,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:45:13,805 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 3 proven. 135 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-29 01:45:13,805 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:45:13,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:45:13,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549071907] [2023-11-29 01:45:13,871 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:45:13,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752761954] [2023-11-29 01:45:13,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752761954] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:45:13,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:45:13,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-11-29 01:45:13,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831485999] [2023-11-29 01:45:13,871 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:45:13,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 01:45:13,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:45:13,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 01:45:13,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2023-11-29 01:45:13,872 INFO L87 Difference]: Start difference. First operand 612 states and 698 transitions. Second operand has 15 states, 13 states have (on average 8.76923076923077) internal successors, (114), 12 states have internal predecessors, (114), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-29 01:45:15,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:45:15,283 INFO L93 Difference]: Finished difference Result 848 states and 901 transitions. [2023-11-29 01:45:15,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 01:45:15,284 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 8.76923076923077) internal successors, (114), 12 states have internal predecessors, (114), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 152 [2023-11-29 01:45:15,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:45:15,285 INFO L225 Difference]: With dead ends: 848 [2023-11-29 01:45:15,285 INFO L226 Difference]: Without dead ends: 847 [2023-11-29 01:45:15,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 126 SyntacticMatches, 14 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2023-11-29 01:45:15,285 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 573 mSDsluCounter, 4014 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 4435 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:45:15,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [583 Valid, 4435 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1010 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 01:45:15,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2023-11-29 01:45:15,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 612. [2023-11-29 01:45:15,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 450 states have (on average 1.3755555555555556) internal successors, (619), 560 states have internal predecessors, (619), 35 states have call successors, (35), 15 states have call predecessors, (35), 19 states have return successors, (43), 36 states have call predecessors, (43), 35 states have call successors, (43) [2023-11-29 01:45:15,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 697 transitions. [2023-11-29 01:45:15,382 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 697 transitions. Word has length 152 [2023-11-29 01:45:15,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:45:15,382 INFO L495 AbstractCegarLoop]: Abstraction has 612 states and 697 transitions. [2023-11-29 01:45:15,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 8.76923076923077) internal successors, (114), 12 states have internal predecessors, (114), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-29 01:45:15,382 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 697 transitions. [2023-11-29 01:45:15,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-11-29 01:45:15,383 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:45:15,383 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:45:15,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2023-11-29 01:45:15,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:45:15,583 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr48ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:45:15,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:45:15,583 INFO L85 PathProgramCache]: Analyzing trace with hash 2062713745, now seen corresponding path program 1 times [2023-11-29 01:45:15,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:45:15,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987582078] [2023-11-29 01:45:15,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:45:15,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:45:15,602 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:45:15,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [603328092] [2023-11-29 01:45:15,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:45:15,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:45:15,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:45:15,603 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:45:15,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2023-11-29 01:45:15,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:45:15,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 01:45:15,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:45:15,885 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 [2023-11-29 01:45:15,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:45:16,535 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 7 treesize of output 3 [2023-11-29 01:45:16,698 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 63 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-29 01:45:16,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:45:18,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:45:18,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987582078] [2023-11-29 01:45:18,047 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:45:18,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603328092] [2023-11-29 01:45:18,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603328092] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:45:18,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:45:18,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-11-29 01:45:18,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223945642] [2023-11-29 01:45:18,048 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:45:18,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 01:45:18,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:45:18,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 01:45:18,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2023-11-29 01:45:18,049 INFO L87 Difference]: Start difference. First operand 612 states and 697 transitions. Second operand has 14 states, 13 states have (on average 9.076923076923077) internal successors, (118), 14 states have internal predecessors, (118), 3 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-29 01:45:19,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:45:19,367 INFO L93 Difference]: Finished difference Result 665 states and 729 transitions. [2023-11-29 01:45:19,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 01:45:19,368 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 9.076923076923077) internal successors, (118), 14 states have internal predecessors, (118), 3 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 151 [2023-11-29 01:45:19,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:45:19,369 INFO L225 Difference]: With dead ends: 665 [2023-11-29 01:45:19,369 INFO L226 Difference]: Without dead ends: 664 [2023-11-29 01:45:19,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 145 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2023-11-29 01:45:19,369 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 240 mSDsluCounter, 1841 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 39 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 2063 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:45:19,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 2063 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 724 Invalid, 1 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 01:45:19,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2023-11-29 01:45:19,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 612. [2023-11-29 01:45:19,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 450 states have (on average 1.3733333333333333) internal successors, (618), 560 states have internal predecessors, (618), 35 states have call successors, (35), 15 states have call predecessors, (35), 19 states have return successors, (43), 36 states have call predecessors, (43), 35 states have call successors, (43) [2023-11-29 01:45:19,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 696 transitions. [2023-11-29 01:45:19,471 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 696 transitions. Word has length 151 [2023-11-29 01:45:19,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:45:19,471 INFO L495 AbstractCegarLoop]: Abstraction has 612 states and 696 transitions. [2023-11-29 01:45:19,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 9.076923076923077) internal successors, (118), 14 states have internal predecessors, (118), 3 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-29 01:45:19,471 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 696 transitions. [2023-11-29 01:45:19,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-11-29 01:45:19,471 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:45:19,472 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:45:19,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2023-11-29 01:45:19,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:45:19,672 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr49ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:45:19,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:45:19,672 INFO L85 PathProgramCache]: Analyzing trace with hash -480383074, now seen corresponding path program 1 times [2023-11-29 01:45:19,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:45:19,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665789424] [2023-11-29 01:45:19,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:45:19,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:45:19,691 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:45:19,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [879505268] [2023-11-29 01:45:19,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:45:19,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:45:19,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:45:19,693 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:45:19,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2023-11-29 01:45:19,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:45:19,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 01:45:19,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:45:19,965 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 [2023-11-29 01:45:20,203 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-29 01:45:20,203 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:45:20,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:45:20,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665789424] [2023-11-29 01:45:20,203 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:45:20,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879505268] [2023-11-29 01:45:20,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879505268] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:45:20,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:45:20,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:45:20,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987640710] [2023-11-29 01:45:20,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:45:20,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:45:20,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:45:20,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:45:20,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:45:20,204 INFO L87 Difference]: Start difference. First operand 612 states and 696 transitions. Second operand has 6 states, 5 states have (on average 23.2) internal successors, (116), 6 states have internal predecessors, (116), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:45:20,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:45:20,681 INFO L93 Difference]: Finished difference Result 664 states and 728 transitions. [2023-11-29 01:45:20,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:45:20,681 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 23.2) internal successors, (116), 6 states have internal predecessors, (116), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 152 [2023-11-29 01:45:20,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:45:20,682 INFO L225 Difference]: With dead ends: 664 [2023-11-29 01:45:20,682 INFO L226 Difference]: Without dead ends: 663 [2023-11-29 01:45:20,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 143 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:45:20,682 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 271 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 38 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:45:20,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 928 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 191 Invalid, 4 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:45:20,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2023-11-29 01:45:20,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 612. [2023-11-29 01:45:20,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 450 states have (on average 1.3711111111111112) internal successors, (617), 560 states have internal predecessors, (617), 35 states have call successors, (35), 15 states have call predecessors, (35), 19 states have return successors, (43), 36 states have call predecessors, (43), 35 states have call successors, (43) [2023-11-29 01:45:20,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 695 transitions. [2023-11-29 01:45:20,781 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 695 transitions. Word has length 152 [2023-11-29 01:45:20,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:45:20,781 INFO L495 AbstractCegarLoop]: Abstraction has 612 states and 695 transitions. [2023-11-29 01:45:20,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 23.2) internal successors, (116), 6 states have internal predecessors, (116), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:45:20,781 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 695 transitions. [2023-11-29 01:45:20,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-11-29 01:45:20,782 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:45:20,782 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:45:20,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2023-11-29 01:45:20,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2023-11-29 01:45:20,982 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr50ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:45:20,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:45:20,983 INFO L85 PathProgramCache]: Analyzing trace with hash -2006973133, now seen corresponding path program 1 times [2023-11-29 01:45:20,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:45:20,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523411852] [2023-11-29 01:45:20,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:45:20,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:45:21,001 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:45:21,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [373949609] [2023-11-29 01:45:21,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:45:21,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:45:21,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:45:21,002 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:45:21,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2023-11-29 01:45:21,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:45:21,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 01:45:21,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:45:21,283 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 [2023-11-29 01:45:21,489 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 [2023-11-29 01:45:21,496 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-29 01:45:21,496 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:45:21,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:45:21,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523411852] [2023-11-29 01:45:21,496 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:45:21,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373949609] [2023-11-29 01:45:21,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373949609] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:45:21,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:45:21,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:45:21,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167760326] [2023-11-29 01:45:21,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:45:21,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:45:21,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:45:21,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:45:21,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:45:21,497 INFO L87 Difference]: Start difference. First operand 612 states and 695 transitions. Second operand has 6 states, 5 states have (on average 23.4) internal successors, (117), 6 states have internal predecessors, (117), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:45:25,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:45:29,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:45:33,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:45:37,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:45:37,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:45:37,996 INFO L93 Difference]: Finished difference Result 663 states and 727 transitions. [2023-11-29 01:45:37,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:45:37,996 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 23.4) internal successors, (117), 6 states have internal predecessors, (117), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 153 [2023-11-29 01:45:37,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:45:37,997 INFO L225 Difference]: With dead ends: 663 [2023-11-29 01:45:37,997 INFO L226 Difference]: Without dead ends: 662 [2023-11-29 01:45:37,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 144 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:45:37,998 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 265 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 39 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 941 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:45:37,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 941 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 178 Invalid, 5 Unknown, 0 Unchecked, 16.3s Time] [2023-11-29 01:45:37,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2023-11-29 01:45:38,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 612. [2023-11-29 01:45:38,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 450 states have (on average 1.3688888888888888) internal successors, (616), 560 states have internal predecessors, (616), 35 states have call successors, (35), 15 states have call predecessors, (35), 19 states have return successors, (43), 36 states have call predecessors, (43), 35 states have call successors, (43) [2023-11-29 01:45:38,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 694 transitions. [2023-11-29 01:45:38,099 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 694 transitions. Word has length 153 [2023-11-29 01:45:38,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:45:38,100 INFO L495 AbstractCegarLoop]: Abstraction has 612 states and 694 transitions. [2023-11-29 01:45:38,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 23.4) internal successors, (117), 6 states have internal predecessors, (117), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:45:38,100 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 694 transitions. [2023-11-29 01:45:38,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-29 01:45:38,100 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:45:38,100 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:45:38,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2023-11-29 01:45:38,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2023-11-29 01:45:38,301 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting func_to_recursive_line_29_to_41_0Err38ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:45:38,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:45:38,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1490936750, now seen corresponding path program 1 times [2023-11-29 01:45:38,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:45:38,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040875449] [2023-11-29 01:45:38,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:45:38,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:45:38,319 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:45:38,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [523867555] [2023-11-29 01:45:38,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:45:38,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:45:38,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:45:38,320 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:45:38,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2023-11-29 01:45:38,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:45:38,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-29 01:45:38,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:45:38,602 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 [2023-11-29 01:45:38,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-11-29 01:45:38,956 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 [2023-11-29 01:45:39,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-11-29 01:45:39,307 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 [2023-11-29 01:45:39,340 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 11 proven. 138 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-29 01:45:39,340 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:45:39,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:45:39,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040875449] [2023-11-29 01:45:39,582 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:45:39,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523867555] [2023-11-29 01:45:39,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523867555] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:45:39,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:45:39,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-11-29 01:45:39,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889867051] [2023-11-29 01:45:39,583 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:45:39,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 01:45:39,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:45:39,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 01:45:39,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2023-11-29 01:45:39,584 INFO L87 Difference]: Start difference. First operand 612 states and 694 transitions. Second operand has 19 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 16 states have internal predecessors, (120), 6 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-29 01:45:43,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:45:47,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:45:52,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:45:56,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:46:01,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:46:01,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:46:01,636 INFO L93 Difference]: Finished difference Result 844 states and 897 transitions. [2023-11-29 01:46:01,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 01:46:01,637 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 16 states have internal predecessors, (120), 6 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 155 [2023-11-29 01:46:01,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:46:01,637 INFO L225 Difference]: With dead ends: 844 [2023-11-29 01:46:01,638 INFO L226 Difference]: Without dead ends: 843 [2023-11-29 01:46:01,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 128 SyntacticMatches, 13 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=211, Invalid=1429, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 01:46:01,638 INFO L413 NwaCegarLoop]: 406 mSDtfsCounter, 754 mSDsluCounter, 4637 mSDsCounter, 0 mSdLazyCounter, 1409 mSolverCounterSat, 44 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 5043 SdHoareTripleChecker+Invalid, 1458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1409 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:46:01,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [764 Valid, 5043 Invalid, 1458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1409 Invalid, 5 Unknown, 0 Unchecked, 21.4s Time] [2023-11-29 01:46:01,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2023-11-29 01:46:01,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 612. [2023-11-29 01:46:01,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 450 states have (on average 1.3666666666666667) internal successors, (615), 560 states have internal predecessors, (615), 35 states have call successors, (35), 15 states have call predecessors, (35), 19 states have return successors, (43), 36 states have call predecessors, (43), 35 states have call successors, (43) [2023-11-29 01:46:01,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 693 transitions. [2023-11-29 01:46:01,736 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 693 transitions. Word has length 155 [2023-11-29 01:46:01,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:46:01,737 INFO L495 AbstractCegarLoop]: Abstraction has 612 states and 693 transitions. [2023-11-29 01:46:01,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 16 states have internal predecessors, (120), 6 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-29 01:46:01,737 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 693 transitions. [2023-11-29 01:46:01,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-11-29 01:46:01,737 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:46:01,737 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:46:01,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2023-11-29 01:46:01,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2023-11-29 01:46:01,938 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr51ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:46:01,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:46:01,938 INFO L85 PathProgramCache]: Analyzing trace with hash -2086624704, now seen corresponding path program 1 times [2023-11-29 01:46:01,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:46:01,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170489808] [2023-11-29 01:46:01,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:01,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:46:01,952 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:46:01,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1380829993] [2023-11-29 01:46:01,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:01,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:01,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:46:01,953 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:46:01,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2023-11-29 01:46:02,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:46:02,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 01:46:02,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:46:02,244 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 [2023-11-29 01:46:02,474 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 [2023-11-29 01:46:02,483 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-29 01:46:02,483 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:46:02,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:46:02,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170489808] [2023-11-29 01:46:02,484 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:46:02,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380829993] [2023-11-29 01:46:02,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380829993] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:46:02,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:46:02,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:46:02,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836791823] [2023-11-29 01:46:02,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:46:02,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:46:02,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:46:02,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:46:02,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:46:02,485 INFO L87 Difference]: Start difference. First operand 612 states and 693 transitions. Second operand has 6 states, 5 states have (on average 23.6) internal successors, (118), 6 states have internal predecessors, (118), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:46:02,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:46:02,929 INFO L93 Difference]: Finished difference Result 662 states and 725 transitions. [2023-11-29 01:46:02,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:46:02,930 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 23.6) internal successors, (118), 6 states have internal predecessors, (118), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 154 [2023-11-29 01:46:02,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:46:02,930 INFO L225 Difference]: With dead ends: 662 [2023-11-29 01:46:02,930 INFO L226 Difference]: Without dead ends: 661 [2023-11-29 01:46:02,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 145 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:46:02,931 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 193 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 37 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 1131 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:46:02,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 1131 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 193 Invalid, 4 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:46:02,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2023-11-29 01:46:03,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 612. [2023-11-29 01:46:03,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 450 states have (on average 1.3644444444444443) internal successors, (614), 560 states have internal predecessors, (614), 35 states have call successors, (35), 15 states have call predecessors, (35), 19 states have return successors, (43), 36 states have call predecessors, (43), 35 states have call successors, (43) [2023-11-29 01:46:03,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 692 transitions. [2023-11-29 01:46:03,032 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 692 transitions. Word has length 154 [2023-11-29 01:46:03,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:46:03,032 INFO L495 AbstractCegarLoop]: Abstraction has 612 states and 692 transitions. [2023-11-29 01:46:03,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 23.6) internal successors, (118), 6 states have internal predecessors, (118), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:46:03,032 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 692 transitions. [2023-11-29 01:46:03,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-11-29 01:46:03,032 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:46:03,033 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:46:03,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2023-11-29 01:46:03,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2023-11-29 01:46:03,233 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting func_to_recursive_line_29_to_41_0Err39ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_29_to_41_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_29_to_41_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 136 more)] === [2023-11-29 01:46:03,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:46:03,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1025601127, now seen corresponding path program 1 times [2023-11-29 01:46:03,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:46:03,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298602757] [2023-11-29 01:46:03,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:03,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:46:03,252 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:46:03,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [184959312] [2023-11-29 01:46:03,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:03,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:03,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:46:03,253 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:46:03,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad9f7c7f-fdb1-4494-9eec-70e321bbe94a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2023-11-29 01:46:03,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:46:03,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 01:46:03,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:46:03,546 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 [2023-11-29 01:46:03,551 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 [2023-11-29 01:46:04,290 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 [2023-11-29 01:46:04,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-11-29 01:46:04,649 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 [2023-11-29 01:46:04,679 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-29 01:46:04,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:46:04,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:46:04,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298602757] [2023-11-29 01:46:04,767 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:46:04,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184959312] [2023-11-29 01:46:04,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184959312] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:46:04,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:46:04,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-11-29 01:46:04,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270996685] [2023-11-29 01:46:04,767 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:46:04,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 01:46:04,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:46:04,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 01:46:04,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-11-29 01:46:04,768 INFO L87 Difference]: Start difference. First operand 612 states and 692 transitions. Second operand has 11 states, 9 states have (on average 12.777777777777779) internal successors, (115), 8 states have internal predecessors, (115), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:46:08,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:46:13,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:46:17,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]