./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd2-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd2-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 020f2d3a270ed8dfae4a7c8fa8db16a8ad645d088f685c7c500cf3124112cf45 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:15:24,285 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:15:24,349 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-21 22:15:24,354 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:15:24,355 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:15:24,381 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:15:24,381 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:15:24,382 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:15:24,383 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 22:15:24,383 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 22:15:24,384 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:15:24,385 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:15:24,386 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:15:24,386 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:15:24,387 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:15:24,388 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:15:24,388 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 22:15:24,389 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:15:24,390 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:15:24,390 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:15:24,391 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:15:24,392 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 22:15:24,392 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:15:24,393 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 22:15:24,393 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-21 22:15:24,394 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 22:15:24,394 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:15:24,395 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 22:15:24,396 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:15:24,396 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:15:24,397 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:15:24,397 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:15:24,398 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:15:24,398 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:15:24,399 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:15:24,400 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:15:24,400 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 22:15:24,401 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:15:24,401 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:15:24,402 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:15:24,402 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:15:24,403 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 22:15:24,403 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:15:24,404 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:15:24,405 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_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 020f2d3a270ed8dfae4a7c8fa8db16a8ad645d088f685c7c500cf3124112cf45 [2023-11-21 22:15:24,732 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:15:24,782 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:15:24,785 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:15:24,787 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:15:24,788 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:15:24,789 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd2-ll.c [2023-11-21 22:15:27,925 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:15:28,164 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:15:28,165 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd2-ll.c [2023-11-21 22:15:28,174 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/data/b691c8ada/e7ed53ac0b6a4ccd938fcbf7183d5ac8/FLAG7e3485c11 [2023-11-21 22:15:28,192 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/data/b691c8ada/e7ed53ac0b6a4ccd938fcbf7183d5ac8 [2023-11-21 22:15:28,194 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:15:28,196 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:15:28,202 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:15:28,202 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:15:28,208 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:15:28,209 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:15:28" (1/1) ... [2023-11-21 22:15:28,211 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42435fbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:28, skipping insertion in model container [2023-11-21 22:15:28,211 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:15:28" (1/1) ... [2023-11-21 22:15:28,238 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:15:28,434 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:15:28,449 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:15:28,497 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:15:28,513 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:15:28,514 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:28 WrapperNode [2023-11-21 22:15:28,514 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:15:28,515 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:15:28,515 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:15:28,516 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:15:28,524 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:28" (1/1) ... [2023-11-21 22:15:28,537 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:28" (1/1) ... [2023-11-21 22:15:28,588 INFO L138 Inliner]: procedures = 17, calls = 142, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 158 [2023-11-21 22:15:28,588 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:15:28,589 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:15:28,590 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:15:28,590 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:15:28,604 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:28" (1/1) ... [2023-11-21 22:15:28,604 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:28" (1/1) ... [2023-11-21 22:15:28,609 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:28" (1/1) ... [2023-11-21 22:15:28,633 INFO L187 HeapSplitter]: Split 86 memory accesses to 13 slices as follows [2, 7, 5, 8, 5, 8, 12, 9, 10, 7, 3, 7, 3] [2023-11-21 22:15:28,633 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:28" (1/1) ... [2023-11-21 22:15:28,634 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:28" (1/1) ... [2023-11-21 22:15:28,648 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:28" (1/1) ... [2023-11-21 22:15:28,650 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:28" (1/1) ... [2023-11-21 22:15:28,654 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:28" (1/1) ... [2023-11-21 22:15:28,658 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:28" (1/1) ... [2023-11-21 22:15:28,677 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:15:28,678 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:15:28,678 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:15:28,679 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:15:28,680 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:28" (1/1) ... [2023-11-21 22:15:28,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:15:28,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:15:28,741 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:15:28,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:15:28,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:15:28,783 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-21 22:15:28,783 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-21 22:15:28,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 22:15:28,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-21 22:15:28,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-21 22:15:28,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-21 22:15:28,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-21 22:15:28,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-21 22:15:28,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-21 22:15:28,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2023-11-21 22:15:28,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2023-11-21 22:15:28,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2023-11-21 22:15:28,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2023-11-21 22:15:28,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2023-11-21 22:15:28,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#12 [2023-11-21 22:15:28,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 22:15:28,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-21 22:15:28,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-21 22:15:28,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-21 22:15:28,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-21 22:15:28,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-21 22:15:28,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-21 22:15:28,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-11-21 22:15:28,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2023-11-21 22:15:28,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2023-11-21 22:15:28,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#9 [2023-11-21 22:15:28,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#10 [2023-11-21 22:15:28,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#11 [2023-11-21 22:15:28,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#12 [2023-11-21 22:15:28,796 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_45_to_53_0 [2023-11-21 22:15:28,796 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_45_to_53_0 [2023-11-21 22:15:28,796 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_39_to_65_0 [2023-11-21 22:15:28,796 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_39_to_65_0 [2023-11-21 22:15:28,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:15:28,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:15:28,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-21 22:15:28,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-21 22:15:28,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-21 22:15:28,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-21 22:15:28,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-21 22:15:28,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-21 22:15:28,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-11-21 22:15:28,798 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2023-11-21 22:15:28,798 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2023-11-21 22:15:28,798 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#9 [2023-11-21 22:15:28,798 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#10 [2023-11-21 22:15:28,798 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#11 [2023-11-21 22:15:28,798 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#12 [2023-11-21 22:15:28,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-21 22:15:28,799 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-21 22:15:28,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 22:15:28,959 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:15:28,962 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:15:29,842 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:15:29,932 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:15:29,932 INFO L308 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-21 22:15:29,934 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:15:29 BoogieIcfgContainer [2023-11-21 22:15:29,934 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:15:29,938 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:15:29,938 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:15:29,942 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:15:29,942 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:15:28" (1/3) ... [2023-11-21 22:15:29,943 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cc1162a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:15:29, skipping insertion in model container [2023-11-21 22:15:29,943 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:28" (2/3) ... [2023-11-21 22:15:29,945 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cc1162a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:15:29, skipping insertion in model container [2023-11-21 22:15:29,945 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:15:29" (3/3) ... [2023-11-21 22:15:29,947 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_egcd2-ll.c [2023-11-21 22:15:29,971 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:15:29,972 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 64 error locations. [2023-11-21 22:15:30,035 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:15:30,042 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;@af3f326, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:15:30,043 INFO L358 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2023-11-21 22:15:30,048 INFO L276 IsEmpty]: Start isEmpty. Operand has 170 states, 87 states have (on average 1.7816091954022988) internal successors, (155), 153 states have internal predecessors, (155), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-21 22:15:30,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-21 22:15:30,056 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:30,056 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:30,057 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_39_to_65_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_39_to_65_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 62 more)] === [2023-11-21 22:15:30,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:30,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1541691341, now seen corresponding path program 1 times [2023-11-21 22:15:30,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:30,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918459954] [2023-11-21 22:15:30,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:30,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:30,255 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:15:30,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1068681200] [2023-11-21 22:15:30,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:30,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:30,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:15:30,259 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:15:30,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:15:30,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:30,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-21 22:15:30,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:15:30,785 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 [2023-11-21 22:15:30,806 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:15:30,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2023-11-21 22:15:30,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:15:30,846 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:15:30,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:30,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918459954] [2023-11-21 22:15:30,847 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:15:30,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068681200] [2023-11-21 22:15:30,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068681200] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:15:30,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:15:30,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-21 22:15:30,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582108265] [2023-11-21 22:15:30,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:15:30,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-21 22:15:30,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:30,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-21 22:15:30,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-11-21 22:15:30,906 INFO L87 Difference]: Start difference. First operand has 170 states, 87 states have (on average 1.7816091954022988) internal successors, (155), 153 states have internal predecessors, (155), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 10 states, 5 states have (on average 1.2) internal successors, (6), 6 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:15:33,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-21 22:15:33,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:33,538 INFO L93 Difference]: Finished difference Result 322 states and 347 transitions. [2023-11-21 22:15:33,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-21 22:15:33,541 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 5 states have (on average 1.2) internal successors, (6), 6 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 10 [2023-11-21 22:15:33,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:33,550 INFO L225 Difference]: With dead ends: 322 [2023-11-21 22:15:33,550 INFO L226 Difference]: Without dead ends: 168 [2023-11-21 22:15:33,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-21 22:15:33,558 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 180 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:33,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 900 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 180 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2023-11-21 22:15:33,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-11-21 22:15:33,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2023-11-21 22:15:33,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 87 states have (on average 1.735632183908046) internal successors, (151), 151 states have internal predecessors, (151), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-21 22:15:33,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 177 transitions. [2023-11-21 22:15:33,613 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 177 transitions. Word has length 10 [2023-11-21 22:15:33,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:33,615 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 177 transitions. [2023-11-21 22:15:33,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 5 states have (on average 1.2) internal successors, (6), 6 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:15:33,615 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 177 transitions. [2023-11-21 22:15:33,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-21 22:15:33,616 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:33,617 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:33,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 22:15:33,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-21 22:15:33,830 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_39_to_65_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_39_to_65_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 62 more)] === [2023-11-21 22:15:33,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:33,831 INFO L85 PathProgramCache]: Analyzing trace with hash -547791135, now seen corresponding path program 1 times [2023-11-21 22:15:33,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:33,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889203790] [2023-11-21 22:15:33,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:33,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:33,907 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:15:33,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [119166416] [2023-11-21 22:15:33,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:33,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:33,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:15:33,909 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:15:33,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:15:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:34,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-21 22:15:34,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:15:34,112 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 [2023-11-21 22:15:34,119 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 [2023-11-21 22:15:34,534 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:15:34,535 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 43 treesize of output 55 [2023-11-21 22:15:34,593 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:15:34,594 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 36 treesize of output 52 [2023-11-21 22:15:34,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:15:34,651 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:15:34,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:34,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889203790] [2023-11-21 22:15:34,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:15:34,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119166416] [2023-11-21 22:15:34,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119166416] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:15:34,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:15:34,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-21 22:15:34,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399142366] [2023-11-21 22:15:34,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:15:34,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-21 22:15:34,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:34,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-21 22:15:34,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-21 22:15:34,657 INFO L87 Difference]: Start difference. First operand 168 states and 177 transitions. Second operand has 11 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:15:36,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-21 22:15:37,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:37,636 INFO L93 Difference]: Finished difference Result 168 states and 177 transitions. [2023-11-21 22:15:37,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 22:15:37,638 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 11 [2023-11-21 22:15:37,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:37,640 INFO L225 Difference]: With dead ends: 168 [2023-11-21 22:15:37,640 INFO L226 Difference]: Without dead ends: 167 [2023-11-21 22:15:37,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-21 22:15:37,642 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 163 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:37,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 1080 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 295 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2023-11-21 22:15:37,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-11-21 22:15:37,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2023-11-21 22:15:37,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 87 states have (on average 1.7241379310344827) internal successors, (150), 150 states have internal predecessors, (150), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-21 22:15:37,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 176 transitions. [2023-11-21 22:15:37,664 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 176 transitions. Word has length 11 [2023-11-21 22:15:37,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:37,665 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 176 transitions. [2023-11-21 22:15:37,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:15:37,665 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 176 transitions. [2023-11-21 22:15:37,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-21 22:15:37,666 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:37,666 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:37,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:15:37,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:37,887 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_39_to_65_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_39_to_65_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 62 more)] === [2023-11-21 22:15:37,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:37,888 INFO L85 PathProgramCache]: Analyzing trace with hash 198344181, now seen corresponding path program 1 times [2023-11-21 22:15:37,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:37,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150569787] [2023-11-21 22:15:37,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:37,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:37,937 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:15:37,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1926139594] [2023-11-21 22:15:37,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:37,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:37,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:15:37,939 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:15:37,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:15:38,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:38,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 22:15:38,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:15:38,161 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 22 treesize of output 10 [2023-11-21 22:15:38,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:15:38,176 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:15:38,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:38,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150569787] [2023-11-21 22:15:38,177 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:15:38,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926139594] [2023-11-21 22:15:38,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926139594] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:15:38,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:15:38,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:15:38,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529671047] [2023-11-21 22:15:38,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:15:38,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:15:38,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:38,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:15:38,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:15:38,183 INFO L87 Difference]: Start difference. First operand 167 states and 176 transitions. Second operand has 6 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:15:38,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:38,418 INFO L93 Difference]: Finished difference Result 167 states and 176 transitions. [2023-11-21 22:15:38,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:15:38,419 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 12 [2023-11-21 22:15:38,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:38,422 INFO L225 Difference]: With dead ends: 167 [2023-11-21 22:15:38,422 INFO L226 Difference]: Without dead ends: 166 [2023-11-21 22:15:38,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:15:38,429 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 8 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:38,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 779 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:15:38,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-11-21 22:15:38,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2023-11-21 22:15:38,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 87 states have (on average 1.7126436781609196) internal successors, (149), 149 states have internal predecessors, (149), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-21 22:15:38,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 175 transitions. [2023-11-21 22:15:38,456 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 175 transitions. Word has length 12 [2023-11-21 22:15:38,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:38,456 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 175 transitions. [2023-11-21 22:15:38,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:15:38,457 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 175 transitions. [2023-11-21 22:15:38,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-21 22:15:38,457 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:38,458 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:38,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 22:15:38,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:38,679 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_39_to_65_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_39_to_65_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 62 more)] === [2023-11-21 22:15:38,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:38,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1853702499, now seen corresponding path program 1 times [2023-11-21 22:15:38,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:38,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115284923] [2023-11-21 22:15:38,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:38,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:38,740 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:15:38,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [763514627] [2023-11-21 22:15:38,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:38,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:38,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:15:38,743 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:15:38,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 22:15:38,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:38,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-21 22:15:38,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:15:38,943 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 [2023-11-21 22:15:39,081 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:15:39,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 28 [2023-11-21 22:15:39,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:15:39,111 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:15:39,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:39,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115284923] [2023-11-21 22:15:39,112 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:15:39,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763514627] [2023-11-21 22:15:39,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763514627] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:15:39,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:15:39,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 22:15:39,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311953300] [2023-11-21 22:15:39,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:15:39,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 22:15:39,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:39,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 22:15:39,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:15:39,115 INFO L87 Difference]: Start difference. First operand 166 states and 175 transitions. Second operand has 8 states, 5 states have (on average 1.8) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:15:39,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:39,438 INFO L93 Difference]: Finished difference Result 166 states and 175 transitions. [2023-11-21 22:15:39,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 22:15:39,438 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 1.8) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 13 [2023-11-21 22:15:39,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:39,440 INFO L225 Difference]: With dead ends: 166 [2023-11-21 22:15:39,440 INFO L226 Difference]: Without dead ends: 165 [2023-11-21 22:15:39,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-21 22:15:39,441 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 169 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:39,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 706 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:15:39,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-11-21 22:15:39,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2023-11-21 22:15:39,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 87 states have (on average 1.7011494252873562) internal successors, (148), 148 states have internal predecessors, (148), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-21 22:15:39,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 174 transitions. [2023-11-21 22:15:39,459 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 174 transitions. Word has length 13 [2023-11-21 22:15:39,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:39,459 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 174 transitions. [2023-11-21 22:15:39,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 1.8) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:15:39,460 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 174 transitions. [2023-11-21 22:15:39,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-21 22:15:39,461 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:39,461 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-21 22:15:39,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 22:15:39,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:39,683 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting func_to_recursive_line_45_to_53_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_39_to_65_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_39_to_65_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 62 more)] === [2023-11-21 22:15:39,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:39,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1958992542, now seen corresponding path program 1 times [2023-11-21 22:15:39,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:39,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250599927] [2023-11-21 22:15:39,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:39,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:39,741 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:15:39,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [60017284] [2023-11-21 22:15:39,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:39,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:39,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:15:39,754 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:15:39,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 22:15:40,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:40,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-21 22:15:40,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:15:40,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-21 22:15:40,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 22:15:40,055 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:15:40,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:40,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250599927] [2023-11-21 22:15:40,055 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:15:40,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60017284] [2023-11-21 22:15:40,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60017284] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:15:40,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:15:40,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:15:40,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89598873] [2023-11-21 22:15:40,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:15:40,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:15:40,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:40,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:15:40,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:15:40,058 INFO L87 Difference]: Start difference. First operand 165 states and 174 transitions. Second operand has 6 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 22:15:40,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:40,320 INFO L93 Difference]: Finished difference Result 276 states and 291 transitions. [2023-11-21 22:15:40,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 22:15:40,321 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2023-11-21 22:15:40,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:40,324 INFO L225 Difference]: With dead ends: 276 [2023-11-21 22:15:40,324 INFO L226 Difference]: Without dead ends: 274 [2023-11-21 22:15:40,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:15:40,325 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 194 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:40,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 763 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:15:40,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2023-11-21 22:15:40,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 214. [2023-11-21 22:15:40,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 131 states have (on average 1.7328244274809161) internal successors, (227), 192 states have internal predecessors, (227), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2023-11-21 22:15:40,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 262 transitions. [2023-11-21 22:15:40,346 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 262 transitions. Word has length 29 [2023-11-21 22:15:40,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:40,347 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 262 transitions. [2023-11-21 22:15:40,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 22:15:40,347 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 262 transitions. [2023-11-21 22:15:40,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-21 22:15:40,348 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:40,348 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-21 22:15:40,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 22:15:40,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:40,570 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_39_to_65_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_39_to_65_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 62 more)] === [2023-11-21 22:15:40,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:40,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1964915253, now seen corresponding path program 1 times [2023-11-21 22:15:40,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:40,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876496840] [2023-11-21 22:15:40,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:40,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:40,623 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:15:40,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [374130851] [2023-11-21 22:15:40,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:40,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:40,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:15:40,637 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:15:40,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 22:15:40,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:40,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-21 22:15:40,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:15:40,893 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 [2023-11-21 22:15:40,899 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 [2023-11-21 22:15:41,064 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 22:15:41,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:15:41,329 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 22:15:41,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:41,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876496840] [2023-11-21 22:15:41,330 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:15:41,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374130851] [2023-11-21 22:15:41,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374130851] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:15:41,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:15:41,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2023-11-21 22:15:41,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976630474] [2023-11-21 22:15:41,331 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:15:41,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-21 22:15:41,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:41,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-21 22:15:41,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-11-21 22:15:41,332 INFO L87 Difference]: Start difference. First operand 214 states and 262 transitions. Second operand has 17 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 4 states have call successors, (9), 4 states have call predecessors, (9), 6 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-21 22:15:43,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-21 22:15:45,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-21 22:15:48,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-21 22:15:50,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-21 22:15:50,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:50,241 INFO L93 Difference]: Finished difference Result 399 states and 490 transitions. [2023-11-21 22:15:50,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-21 22:15:50,241 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 4 states have call successors, (9), 4 states have call predecessors, (9), 6 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 29 [2023-11-21 22:15:50,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:50,244 INFO L225 Difference]: With dead ends: 399 [2023-11-21 22:15:50,245 INFO L226 Difference]: Without dead ends: 368 [2023-11-21 22:15:50,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2023-11-21 22:15:50,247 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 303 mSDsluCounter, 1301 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 48 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 1448 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:50,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 1448 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 371 Invalid, 4 Unknown, 0 Unchecked, 8.7s Time] [2023-11-21 22:15:50,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2023-11-21 22:15:50,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 327. [2023-11-21 22:15:50,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 229 states have (on average 1.7510917030567685) internal successors, (401), 291 states have internal predecessors, (401), 27 states have call successors, (27), 11 states have call predecessors, (27), 11 states have return successors, (30), 26 states have call predecessors, (30), 27 states have call successors, (30) [2023-11-21 22:15:50,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 458 transitions. [2023-11-21 22:15:50,277 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 458 transitions. Word has length 29 [2023-11-21 22:15:50,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:50,278 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 458 transitions. [2023-11-21 22:15:50,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 4 states have call successors, (9), 4 states have call predecessors, (9), 6 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-21 22:15:50,278 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 458 transitions. [2023-11-21 22:15:50,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-21 22:15:50,279 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:50,279 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-21 22:15:50,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 22:15:50,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:50,502 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting func_to_recursive_line_45_to_53_0Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_39_to_65_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_39_to_65_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 62 more)] === [2023-11-21 22:15:50,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:50,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1396154780, now seen corresponding path program 1 times [2023-11-21 22:15:50,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:50,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230213035] [2023-11-21 22:15:50,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:50,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:50,542 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:15:50,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [700407806] [2023-11-21 22:15:50,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:50,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:50,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:15:50,544 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:15:50,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 22:15:50,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:50,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-21 22:15:50,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:15:50,862 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 [2023-11-21 22:15:50,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-21 22:15:50,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-11-21 22:15:50,999 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 [2023-11-21 22:15:51,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-21 22:15:51,117 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 22:15:51,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:15:55,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:55,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230213035] [2023-11-21 22:15:55,616 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:15:55,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700407806] [2023-11-21 22:15:55,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700407806] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:15:55,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:15:55,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-11-21 22:15:55,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315006358] [2023-11-21 22:15:55,617 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-21 22:15:55,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-21 22:15:55,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:55,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-21 22:15:55,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=447, Unknown=2, NotChecked=0, Total=506 [2023-11-21 22:15:55,619 INFO L87 Difference]: Start difference. First operand 327 states and 458 transitions. Second operand has 15 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 12 states have internal predecessors, (20), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-21 22:15:57,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-21 22:15:59,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-21 22:16:02,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-21 22:16:04,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-21 22:16:06,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-21 22:16:08,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-21 22:16:08,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:16:08,838 INFO L93 Difference]: Finished difference Result 424 states and 483 transitions. [2023-11-21 22:16:08,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-21 22:16:08,840 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 12 states have internal predecessors, (20), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2023-11-21 22:16:08,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:16:08,844 INFO L225 Difference]: With dead ends: 424 [2023-11-21 22:16:08,844 INFO L226 Difference]: Without dead ends: 423 [2023-11-21 22:16:08,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=176, Invalid=1154, Unknown=2, NotChecked=0, Total=1332 [2023-11-21 22:16:08,846 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 641 mSDsluCounter, 1756 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 52 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 1898 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2023-11-21 22:16:08,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [642 Valid, 1898 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 494 Invalid, 6 Unknown, 0 Unchecked, 12.8s Time] [2023-11-21 22:16:08,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2023-11-21 22:16:08,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 327. [2023-11-21 22:16:08,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 229 states have (on average 1.7467248908296944) internal successors, (400), 291 states have internal predecessors, (400), 27 states have call successors, (27), 11 states have call predecessors, (27), 11 states have return successors, (30), 26 states have call predecessors, (30), 27 states have call successors, (30) [2023-11-21 22:16:08,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 457 transitions. [2023-11-21 22:16:08,883 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 457 transitions. Word has length 31 [2023-11-21 22:16:08,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:16:08,883 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 457 transitions. [2023-11-21 22:16:08,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 12 states have internal predecessors, (20), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-21 22:16:08,884 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 457 transitions. [2023-11-21 22:16:08,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-21 22:16:08,885 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:16:08,885 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-21 22:16:08,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-21 22:16:09,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-21 22:16:09,099 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting func_to_recursive_line_45_to_53_0Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_39_to_65_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_39_to_65_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 62 more)] === [2023-11-21 22:16:09,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:16:09,100 INFO L85 PathProgramCache]: Analyzing trace with hash -331125140, now seen corresponding path program 1 times [2023-11-21 22:16:09,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:16:09,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53136757] [2023-11-21 22:16:09,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:16:09,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:16:09,147 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:16:09,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [570177239] [2023-11-21 22:16:09,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:16:09,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:16:09,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:16:09,150 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:16:09,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d690b63-50d3-4400-ad52-f6775779da73/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-21 22:16:09,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:16:09,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-21 22:16:09,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:16:09,382 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 [2023-11-21 22:16:09,440 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 23 treesize of output 15 [2023-11-21 22:16:09,445 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 [2023-11-21 22:16:09,549 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 [2023-11-21 22:16:09,560 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 15 treesize of output 1 [2023-11-21 22:16:09,565 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 [2023-11-21 22:16:09,662 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 [2023-11-21 22:16:09,687 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 22:16:09,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:16:29,981 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 22:16:29,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:16:29,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53136757] [2023-11-21 22:16:29,981 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:16:29,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570177239] [2023-11-21 22:16:29,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570177239] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-21 22:16:29,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:16:29,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 21 [2023-11-21 22:16:29,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755051131] [2023-11-21 22:16:29,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:16:29,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-21 22:16:29,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:16:29,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-21 22:16:29,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=399, Unknown=9, NotChecked=0, Total=462 [2023-11-21 22:16:29,984 INFO L87 Difference]: Start difference. First operand 327 states and 457 transitions. Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-21 22:16:32,294 WARN L854 $PredicateComparison]: unable to prove that (and (<= (select (select |c_#memory_int#9| c_func_to_recursive_line_39_to_65_0_~a.base) c_func_to_recursive_line_39_to_65_0_~a.offset) 9223372036854775807) (forall ((|func_to_recursive_line_45_to_53_0_#t~mem5| Int)) (<= (+ (* (select (select |c_#memory_int#1| c_func_to_recursive_line_39_to_65_0_~k.base) c_func_to_recursive_line_39_to_65_0_~k.offset) |func_to_recursive_line_45_to_53_0_#t~mem5|) (select (select |c_#memory_int#11| c_func_to_recursive_line_39_to_65_0_~c.base) c_func_to_recursive_line_39_to_65_0_~c.offset)) 9223372036854775807)) (< (select (select |c_#memory_int#9| |c_func_to_recursive_line_39_to_65_0_#in~a.base|) |c_func_to_recursive_line_39_to_65_0_#in~a.offset|) 9223372036854775808)) is different from false