./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7c6261a52ba91bad3864c182e4633afd262bc5fe07cf18f92cb66db83623b9ae --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:35:32,059 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:35:32,199 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-23 21:35:32,211 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:35:32,212 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:35:32,269 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:35:32,270 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:35:32,271 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:35:32,272 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 21:35:32,278 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 21:35:32,279 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:35:32,279 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:35:32,280 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 21:35:32,282 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 21:35:32,283 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 21:35:32,283 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:35:32,284 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:35:32,284 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:35:32,285 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:35:32,285 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:35:32,287 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:35:32,288 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:35:32,288 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:35:32,289 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:35:32,289 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-23 21:35:32,290 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 21:35:32,290 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:35:32,291 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:35:32,291 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:35:32,292 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:35:32,294 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 21:35:32,294 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:35:32,294 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:35:32,295 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:35:32,295 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:35:32,295 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:35:32,295 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:35:32,296 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 21:35:32,296 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:35:32,296 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:35:32,297 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 21:35:32,297 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:35:32,297 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 21:35:32,298 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:35:32,298 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_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c6261a52ba91bad3864c182e4633afd262bc5fe07cf18f92cb66db83623b9ae [2023-11-23 21:35:32,648 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:35:32,711 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:35:32,714 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:35:32,715 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:35:32,716 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:35:32,717 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-ll.c [2023-11-23 21:35:36,052 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:35:36,253 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:35:36,254 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-ll.c [2023-11-23 21:35:36,263 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/data/4ba8dc3be/989466d681934a17807396cce0c7867c/FLAG6c593953e [2023-11-23 21:35:36,281 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/data/4ba8dc3be/989466d681934a17807396cce0c7867c [2023-11-23 21:35:36,284 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:35:36,285 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:35:36,287 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:35:36,288 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:35:36,305 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:35:36,308 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:35:36" (1/1) ... [2023-11-23 21:35:36,310 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c283ece and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:35:36, skipping insertion in model container [2023-11-23 21:35:36,310 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:35:36" (1/1) ... [2023-11-23 21:35:36,347 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:35:36,558 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:35:36,570 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:35:36,602 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:35:36,617 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:35:36,618 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:35:36 WrapperNode [2023-11-23 21:35:36,618 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:35:36,619 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:35:36,620 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:35:36,620 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:35:36,628 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:35:36" (1/1) ... [2023-11-23 21:35:36,638 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:35:36" (1/1) ... [2023-11-23 21:35:36,660 INFO L138 Inliner]: procedures = 17, calls = 85, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 81 [2023-11-23 21:35:36,661 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:35:36,662 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:35:36,662 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:35:36,662 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:35:36,676 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:35:36" (1/1) ... [2023-11-23 21:35:36,676 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:35:36" (1/1) ... [2023-11-23 21:35:36,695 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:35:36" (1/1) ... [2023-11-23 21:35:36,714 INFO L189 HeapSplitter]: Split 49 memory accesses to 7 slices as follows [2, 5, 10, 6, 8, 10, 8] [2023-11-23 21:35:36,715 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:35:36" (1/1) ... [2023-11-23 21:35:36,715 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:35:36" (1/1) ... [2023-11-23 21:35:36,729 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:35:36" (1/1) ... [2023-11-23 21:35:36,732 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:35:36" (1/1) ... [2023-11-23 21:35:36,734 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:35:36" (1/1) ... [2023-11-23 21:35:36,736 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:35:36" (1/1) ... [2023-11-23 21:35:36,741 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:35:36,742 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:35:36,742 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:35:36,742 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:35:36,743 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:35:36" (1/1) ... [2023-11-23 21:35:36,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:35:36,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:35:36,789 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:35:36,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:35:36,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:35:36,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 21:35:36,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 21:35:36,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 21:35:36,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-23 21:35:36,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-23 21:35:36,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-23 21:35:36,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-23 21:35:36,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:35:36,830 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_41_to_52_0 [2023-11-23 21:35:36,830 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_41_to_52_0 [2023-11-23 21:35:36,830 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_32_to_55_0 [2023-11-23 21:35:36,831 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_32_to_55_0 [2023-11-23 21:35:36,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 21:35:36,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 21:35:36,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 21:35:36,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-23 21:35:36,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-23 21:35:36,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-23 21:35:36,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-11-23 21:35:36,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:35:36,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:35:36,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 21:35:36,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 21:35:36,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-23 21:35:36,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-23 21:35:36,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-23 21:35:36,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-23 21:35:36,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-11-23 21:35:36,833 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 21:35:36,833 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 21:35:36,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:35:36,961 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:35:36,963 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:35:37,514 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:35:37,577 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:35:37,577 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 21:35:37,578 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:35:37 BoogieIcfgContainer [2023-11-23 21:35:37,578 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:35:37,582 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:35:37,583 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:35:37,586 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:35:37,586 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:35:36" (1/3) ... [2023-11-23 21:35:37,587 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b98a628 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:35:37, skipping insertion in model container [2023-11-23 21:35:37,588 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:35:36" (2/3) ... [2023-11-23 21:35:37,588 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b98a628 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:35:37, skipping insertion in model container [2023-11-23 21:35:37,588 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:35:37" (3/3) ... [2023-11-23 21:35:37,591 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_cohendiv-ll.c [2023-11-23 21:35:37,614 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:35:37,615 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-11-23 21:35:37,677 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:35:37,684 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;@3258043a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:35:37,685 INFO L358 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2023-11-23 21:35:37,690 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 53 states have (on average 1.679245283018868) internal successors, (89), 85 states have internal predecessors, (89), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-23 21:35:37,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 21:35:37,699 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:35:37,699 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:35:37,701 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting func_to_recursive_line_32_to_55_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_32_to_55_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_32_to_55_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-11-23 21:35:37,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:35:37,713 INFO L85 PathProgramCache]: Analyzing trace with hash 2079099017, now seen corresponding path program 1 times [2023-11-23 21:35:37,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:35:37,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457213086] [2023-11-23 21:35:37,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:37,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:35:37,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:35:37,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:35:37,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457213086] [2023-11-23 21:35:37,972 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-23 21:35:37,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358985424] [2023-11-23 21:35:37,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:37,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:35:37,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:35:37,976 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:35:37,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:35:38,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:35:38,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-23 21:35:38,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:35:38,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:35:38,179 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:35:38,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358985424] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:35:38,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:35:38,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:35:38,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798155426] [2023-11-23 21:35:38,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:35:38,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 21:35:38,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:35:38,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 21:35:38,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:35:38,230 INFO L87 Difference]: Start difference. First operand has 98 states, 53 states have (on average 1.679245283018868) internal successors, (89), 85 states have internal predecessors, (89), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:35:38,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:35:38,288 INFO L93 Difference]: Finished difference Result 194 states and 230 transitions. [2023-11-23 21:35:38,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 21:35:38,292 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-23 21:35:38,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:35:38,303 INFO L225 Difference]: With dead ends: 194 [2023-11-23 21:35:38,303 INFO L226 Difference]: Without dead ends: 95 [2023-11-23 21:35:38,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:35:38,312 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:35:38,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 105 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:35:38,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-23 21:35:38,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2023-11-23 21:35:38,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 52 states have (on average 1.5961538461538463) internal successors, (83), 83 states have internal predecessors, (83), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-23 21:35:38,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2023-11-23 21:35:38,366 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 7 [2023-11-23 21:35:38,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:35:38,367 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2023-11-23 21:35:38,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:35:38,368 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2023-11-23 21:35:38,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 21:35:38,368 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:35:38,368 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:35:38,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 21:35:38,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-23 21:35:38,590 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting func_to_recursive_line_32_to_55_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_32_to_55_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_32_to_55_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-11-23 21:35:38,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:35:38,591 INFO L85 PathProgramCache]: Analyzing trace with hash 2136357319, now seen corresponding path program 1 times [2023-11-23 21:35:38,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:35:38,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615364994] [2023-11-23 21:35:38,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:38,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:35:38,677 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:35:38,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [557343072] [2023-11-23 21:35:38,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:38,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:35:38,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:35:38,689 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:35:38,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:35:38,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:35:38,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 21:35:38,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:35:38,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 21:35:38,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:35:38,997 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:35:38,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:35:39,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615364994] [2023-11-23 21:35:39,002 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:35:39,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557343072] [2023-11-23 21:35:39,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557343072] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:35:39,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:35:39,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:35:39,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146602832] [2023-11-23 21:35:39,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:35:39,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:35:39,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:35:39,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:35:39,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:35:39,010 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:35:39,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:35:39,214 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2023-11-23 21:35:39,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:35:39,215 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-23 21:35:39,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:35:39,218 INFO L225 Difference]: With dead ends: 125 [2023-11-23 21:35:39,218 INFO L226 Difference]: Without dead ends: 123 [2023-11-23 21:35:39,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:35:39,221 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 41 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:35:39,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 451 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:35:39,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-11-23 21:35:39,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 110. [2023-11-23 21:35:39,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 64 states have (on average 1.5625) internal successors, (100), 95 states have internal predecessors, (100), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2023-11-23 21:35:39,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 125 transitions. [2023-11-23 21:35:39,244 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 125 transitions. Word has length 7 [2023-11-23 21:35:39,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:35:39,245 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 125 transitions. [2023-11-23 21:35:39,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:35:39,245 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 125 transitions. [2023-11-23 21:35:39,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 21:35:39,246 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:35:39,246 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:35:39,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:35:39,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:35:39,468 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting func_to_recursive_line_32_to_55_0Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_32_to_55_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_32_to_55_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-11-23 21:35:39,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:35:39,469 INFO L85 PathProgramCache]: Analyzing trace with hash 696431214, now seen corresponding path program 1 times [2023-11-23 21:35:39,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:35:39,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113217689] [2023-11-23 21:35:39,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:39,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:35:39,532 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:35:39,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [908871228] [2023-11-23 21:35:39,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:39,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:35:39,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:35:39,534 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:35:39,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:35:39,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:35:39,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-23 21:35:39,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:35:39,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 21:35:39,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 21:35:39,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-23 21:35:39,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:35:39,963 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:35:39,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:35:39,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113217689] [2023-11-23 21:35:39,964 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:35:39,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908871228] [2023-11-23 21:35:39,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908871228] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:35:39,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:35:39,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:35:39,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932533210] [2023-11-23 21:35:39,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:35:39,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 21:35:39,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:35:39,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 21:35:39,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:35:39,968 INFO L87 Difference]: Start difference. First operand 110 states and 125 transitions. Second operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:35:40,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:35:40,425 INFO L93 Difference]: Finished difference Result 183 states and 198 transitions. [2023-11-23 21:35:40,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 21:35:40,426 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-11-23 21:35:40,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:35:40,429 INFO L225 Difference]: With dead ends: 183 [2023-11-23 21:35:40,429 INFO L226 Difference]: Without dead ends: 182 [2023-11-23 21:35:40,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-23 21:35:40,431 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 117 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:35:40,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 551 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:35:40,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-11-23 21:35:40,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 145. [2023-11-23 21:35:40,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 91 states have (on average 1.5714285714285714) internal successors, (143), 124 states have internal predecessors, (143), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2023-11-23 21:35:40,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 180 transitions. [2023-11-23 21:35:40,460 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 180 transitions. Word has length 15 [2023-11-23 21:35:40,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:35:40,461 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 180 transitions. [2023-11-23 21:35:40,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:35:40,461 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 180 transitions. [2023-11-23 21:35:40,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 21:35:40,462 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:35:40,462 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:35:40,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:35:40,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:35:40,669 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting func_to_recursive_line_32_to_55_0Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_32_to_55_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_32_to_55_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-11-23 21:35:40,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:35:40,670 INFO L85 PathProgramCache]: Analyzing trace with hash 114531197, now seen corresponding path program 1 times [2023-11-23 21:35:40,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:35:40,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816559022] [2023-11-23 21:35:40,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:40,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:35:40,700 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:35:40,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1653112829] [2023-11-23 21:35:40,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:40,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:35:40,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:35:40,710 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:35:40,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:35:40,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:35:40,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 21:35:40,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:35:40,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 21:35:40,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:35:40,943 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:35:40,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:35:40,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816559022] [2023-11-23 21:35:40,944 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:35:40,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653112829] [2023-11-23 21:35:40,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653112829] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:35:40,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:35:40,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:35:40,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228209298] [2023-11-23 21:35:40,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:35:40,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:35:40,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:35:40,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:35:40,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:35:40,947 INFO L87 Difference]: Start difference. First operand 145 states and 180 transitions. Second operand has 7 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:35:41,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:35:41,166 INFO L93 Difference]: Finished difference Result 182 states and 197 transitions. [2023-11-23 21:35:41,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:35:41,167 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-23 21:35:41,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:35:41,170 INFO L225 Difference]: With dead ends: 182 [2023-11-23 21:35:41,170 INFO L226 Difference]: Without dead ends: 181 [2023-11-23 21:35:41,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:35:41,179 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 119 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:35:41,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 438 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:35:41,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-11-23 21:35:41,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 145. [2023-11-23 21:35:41,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 91 states have (on average 1.5604395604395604) internal successors, (142), 124 states have internal predecessors, (142), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2023-11-23 21:35:41,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 179 transitions. [2023-11-23 21:35:41,212 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 179 transitions. Word has length 16 [2023-11-23 21:35:41,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:35:41,213 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 179 transitions. [2023-11-23 21:35:41,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:35:41,214 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 179 transitions. [2023-11-23 21:35:41,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 21:35:41,214 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:35:41,215 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:35:41,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-23 21:35:41,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:35:41,432 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting func_to_recursive_line_32_to_55_0Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_32_to_55_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_32_to_55_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-11-23 21:35:41,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:35:41,447 INFO L85 PathProgramCache]: Analyzing trace with hash -744500144, now seen corresponding path program 1 times [2023-11-23 21:35:41,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:35:41,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096487466] [2023-11-23 21:35:41,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:41,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:35:41,500 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:35:41,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [342400509] [2023-11-23 21:35:41,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:41,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:35:41,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:35:41,529 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:35:41,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:35:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:35:41,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-23 21:35:41,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:35:41,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 21:35:41,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 21:35:41,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 21:35:41,732 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 25 treesize of output 17 [2023-11-23 21:35:41,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 21:35:41,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-23 21:35:41,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-23 21:35:41,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:35:41,970 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:35:41,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:35:41,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096487466] [2023-11-23 21:35:41,971 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:35:41,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342400509] [2023-11-23 21:35:41,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342400509] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:35:41,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:35:41,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:35:41,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727743832] [2023-11-23 21:35:41,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:35:41,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 21:35:41,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:35:41,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 21:35:41,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:35:41,974 INFO L87 Difference]: Start difference. First operand 145 states and 179 transitions. Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:35:44,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 21:35:44,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:35:44,365 INFO L93 Difference]: Finished difference Result 177 states and 192 transitions. [2023-11-23 21:35:44,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 21:35:44,366 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-11-23 21:35:44,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:35:44,367 INFO L225 Difference]: With dead ends: 177 [2023-11-23 21:35:44,368 INFO L226 Difference]: Without dead ends: 176 [2023-11-23 21:35:44,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:35:44,369 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 104 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:35:44,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 556 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 210 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2023-11-23 21:35:44,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2023-11-23 21:35:44,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 145. [2023-11-23 21:35:44,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 91 states have (on average 1.5494505494505495) internal successors, (141), 124 states have internal predecessors, (141), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2023-11-23 21:35:44,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 178 transitions. [2023-11-23 21:35:44,390 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 178 transitions. Word has length 17 [2023-11-23 21:35:44,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:35:44,391 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 178 transitions. [2023-11-23 21:35:44,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:35:44,391 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 178 transitions. [2023-11-23 21:35:44,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-23 21:35:44,392 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:35:44,392 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:35:44,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:35:44,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:35:44,609 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting func_to_recursive_line_32_to_55_0Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_32_to_55_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_32_to_55_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-11-23 21:35:44,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:35:44,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1604667937, now seen corresponding path program 1 times [2023-11-23 21:35:44,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:35:44,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894585487] [2023-11-23 21:35:44,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:44,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:35:44,645 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:35:44,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1717600106] [2023-11-23 21:35:44,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:44,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:35:44,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:35:44,665 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:35:44,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 21:35:44,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:35:44,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-23 21:35:44,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:35:44,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 21:35:44,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 21:35:44,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 21:35:44,875 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 [2023-11-23 21:35:44,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 21:35:45,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-23 21:35:45,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-23 21:35:45,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:35:45,099 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:35:45,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:35:45,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894585487] [2023-11-23 21:35:45,099 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:35:45,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717600106] [2023-11-23 21:35:45,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717600106] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:35:45,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:35:45,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:35:45,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528227593] [2023-11-23 21:35:45,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:35:45,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 21:35:45,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:35:45,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 21:35:45,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:35:45,102 INFO L87 Difference]: Start difference. First operand 145 states and 178 transitions. Second operand has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:35:47,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 21:35:47,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:35:47,491 INFO L93 Difference]: Finished difference Result 176 states and 191 transitions. [2023-11-23 21:35:47,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 21:35:47,492 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-11-23 21:35:47,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:35:47,494 INFO L225 Difference]: With dead ends: 176 [2023-11-23 21:35:47,494 INFO L226 Difference]: Without dead ends: 175 [2023-11-23 21:35:47,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:35:47,496 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 99 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:35:47,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 581 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 213 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2023-11-23 21:35:47,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-11-23 21:35:47,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 145. [2023-11-23 21:35:47,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 91 states have (on average 1.5384615384615385) internal successors, (140), 124 states have internal predecessors, (140), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2023-11-23 21:35:47,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 177 transitions. [2023-11-23 21:35:47,515 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 177 transitions. Word has length 18 [2023-11-23 21:35:47,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:35:47,515 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 177 transitions. [2023-11-23 21:35:47,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:35:47,515 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 177 transitions. [2023-11-23 21:35:47,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-23 21:35:47,517 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:35:47,517 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:35:47,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 21:35:47,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 21:35:47,739 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting func_to_recursive_line_41_to_52_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_32_to_55_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_32_to_55_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-11-23 21:35:47,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:35:47,739 INFO L85 PathProgramCache]: Analyzing trace with hash 38004471, now seen corresponding path program 1 times [2023-11-23 21:35:47,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:35:47,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746641492] [2023-11-23 21:35:47,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:47,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:35:47,782 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:35:47,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [992516962] [2023-11-23 21:35:47,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:47,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:35:47,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:35:47,784 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:35:47,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 21:35:47,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:35:47,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-23 21:35:47,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:35:47,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 21:35:48,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 21:35:48,161 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 15 treesize of output 7 [2023-11-23 21:35:48,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-23 21:35:48,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:35:48,181 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:35:48,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:35:48,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746641492] [2023-11-23 21:35:48,181 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:35:48,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992516962] [2023-11-23 21:35:48,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992516962] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:35:48,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:35:48,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-23 21:35:48,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148180766] [2023-11-23 21:35:48,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:35:48,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 21:35:48,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:35:48,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 21:35:48,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-23 21:35:48,185 INFO L87 Difference]: Start difference. First operand 145 states and 177 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:35:50,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 21:35:50,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:35:50,730 INFO L93 Difference]: Finished difference Result 256 states and 317 transitions. [2023-11-23 21:35:50,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 21:35:50,731 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2023-11-23 21:35:50,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:35:50,736 INFO L225 Difference]: With dead ends: 256 [2023-11-23 21:35:50,736 INFO L226 Difference]: Without dead ends: 255 [2023-11-23 21:35:50,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2023-11-23 21:35:50,738 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 218 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 22 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:35:50,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 600 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 322 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2023-11-23 21:35:50,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2023-11-23 21:35:50,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 207. [2023-11-23 21:35:50,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 139 states have (on average 1.5467625899280575) internal successors, (215), 173 states have internal predecessors, (215), 28 states have call successors, (28), 9 states have call predecessors, (28), 10 states have return successors, (34), 27 states have call predecessors, (34), 28 states have call successors, (34) [2023-11-23 21:35:50,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 277 transitions. [2023-11-23 21:35:50,766 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 277 transitions. Word has length 29 [2023-11-23 21:35:50,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:35:50,767 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 277 transitions. [2023-11-23 21:35:50,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:35:50,767 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 277 transitions. [2023-11-23 21:35:50,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-23 21:35:50,769 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:35:50,769 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:35:50,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 21:35:50,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-23 21:35:50,983 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_32_to_55_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_32_to_55_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-11-23 21:35:50,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:35:50,984 INFO L85 PathProgramCache]: Analyzing trace with hash 34357506, now seen corresponding path program 1 times [2023-11-23 21:35:50,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:35:50,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181768243] [2023-11-23 21:35:50,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:50,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:35:51,014 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:35:51,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [199465512] [2023-11-23 21:35:51,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:51,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:35:51,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:35:51,017 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:35:51,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 21:35:51,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:35:51,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:35:51,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:35:51,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 21:35:51,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:35:51,213 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:35:51,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:35:51,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181768243] [2023-11-23 21:35:51,214 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:35:51,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199465512] [2023-11-23 21:35:51,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199465512] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:35:51,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:35:51,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:35:51,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122820612] [2023-11-23 21:35:51,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:35:51,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:35:51,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:35:51,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:35:51,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:35:51,216 INFO L87 Difference]: Start difference. First operand 207 states and 277 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:35:51,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:35:51,387 INFO L93 Difference]: Finished difference Result 218 states and 287 transitions. [2023-11-23 21:35:51,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:35:51,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2023-11-23 21:35:51,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:35:51,391 INFO L225 Difference]: With dead ends: 218 [2023-11-23 21:35:51,391 INFO L226 Difference]: Without dead ends: 216 [2023-11-23 21:35:51,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:35:51,392 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 70 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:35:51,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 236 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:35:51,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-11-23 21:35:51,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 212. [2023-11-23 21:35:51,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 143 states have (on average 1.5314685314685315) internal successors, (219), 176 states have internal predecessors, (219), 28 states have call successors, (28), 9 states have call predecessors, (28), 11 states have return successors, (35), 28 states have call predecessors, (35), 28 states have call successors, (35) [2023-11-23 21:35:51,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 282 transitions. [2023-11-23 21:35:51,439 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 282 transitions. Word has length 29 [2023-11-23 21:35:51,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:35:51,440 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 282 transitions. [2023-11-23 21:35:51,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:35:51,440 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 282 transitions. [2023-11-23 21:35:51,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-23 21:35:51,441 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:35:51,441 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:35:51,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 21:35:51,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-23 21:35:51,648 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting func_to_recursive_line_41_to_52_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_32_to_55_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_32_to_55_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-11-23 21:35:51,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:35:51,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1178138677, now seen corresponding path program 1 times [2023-11-23 21:35:51,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:35:51,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447923408] [2023-11-23 21:35:51,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:51,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:35:51,699 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:35:51,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843264529] [2023-11-23 21:35:51,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:51,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:35:51,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:35:51,701 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:35:51,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 21:35:51,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:35:51,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-23 21:35:51,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:35:51,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 21:35:51,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 21:35:52,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-23 21:35:52,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-23 21:35:52,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:35:52,276 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:35:52,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:35:52,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447923408] [2023-11-23 21:35:52,277 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:35:52,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843264529] [2023-11-23 21:35:52,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843264529] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:35:52,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:35:52,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-23 21:35:52,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208681449] [2023-11-23 21:35:52,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:35:52,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 21:35:52,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:35:52,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 21:35:52,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-23 21:35:52,282 INFO L87 Difference]: Start difference. First operand 212 states and 282 transitions. Second operand has 11 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:35:52,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:35:52,654 INFO L93 Difference]: Finished difference Result 251 states and 316 transitions. [2023-11-23 21:35:52,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 21:35:52,655 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2023-11-23 21:35:52,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:35:52,658 INFO L225 Difference]: With dead ends: 251 [2023-11-23 21:35:52,658 INFO L226 Difference]: Without dead ends: 250 [2023-11-23 21:35:52,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-11-23 21:35:52,662 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 111 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:35:52,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 534 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:35:52,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-11-23 21:35:52,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 216. [2023-11-23 21:35:52,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 146 states have (on average 1.5136986301369864) internal successors, (221), 179 states have internal predecessors, (221), 28 states have call successors, (28), 10 states have call predecessors, (28), 12 states have return successors, (35), 28 states have call predecessors, (35), 28 states have call successors, (35) [2023-11-23 21:35:52,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 284 transitions. [2023-11-23 21:35:52,697 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 284 transitions. Word has length 30 [2023-11-23 21:35:52,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:35:52,697 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 284 transitions. [2023-11-23 21:35:52,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:35:52,698 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 284 transitions. [2023-11-23 21:35:52,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-23 21:35:52,699 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:35:52,699 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:35:52,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 21:35:52,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:35:52,926 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_32_to_55_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_32_to_55_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-11-23 21:35:52,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:35:52,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1342170716, now seen corresponding path program 1 times [2023-11-23 21:35:52,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:35:52,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999531176] [2023-11-23 21:35:52,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:52,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:35:52,956 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:35:52,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [113852375] [2023-11-23 21:35:52,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:52,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:35:52,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:35:52,961 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:35:53,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 21:35:53,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:35:53,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 21:35:53,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:35:53,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 21:35:53,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 21:35:53,175 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 25 treesize of output 17 [2023-11-23 21:35:53,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 21:35:53,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-23 21:35:53,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:35:53,337 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:35:53,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:35:53,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999531176] [2023-11-23 21:35:53,338 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:35:53,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113852375] [2023-11-23 21:35:53,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113852375] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:35:53,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:35:53,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:35:53,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216096008] [2023-11-23 21:35:53,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:35:53,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:35:53,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:35:53,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:35:53,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:35:53,341 INFO L87 Difference]: Start difference. First operand 216 states and 284 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:35:53,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:35:53,655 INFO L93 Difference]: Finished difference Result 220 states and 287 transitions. [2023-11-23 21:35:53,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:35:53,656 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-11-23 21:35:53,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:35:53,658 INFO L225 Difference]: With dead ends: 220 [2023-11-23 21:35:53,658 INFO L226 Difference]: Without dead ends: 219 [2023-11-23 21:35:53,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-23 21:35:53,659 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 66 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:35:53,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 352 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:35:53,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-11-23 21:35:53,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 217. [2023-11-23 21:35:53,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 147 states have (on average 1.510204081632653) internal successors, (222), 180 states have internal predecessors, (222), 28 states have call successors, (28), 10 states have call predecessors, (28), 12 states have return successors, (35), 28 states have call predecessors, (35), 28 states have call successors, (35) [2023-11-23 21:35:53,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 285 transitions. [2023-11-23 21:35:53,694 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 285 transitions. Word has length 31 [2023-11-23 21:35:53,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:35:53,695 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 285 transitions. [2023-11-23 21:35:53,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:35:53,695 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 285 transitions. [2023-11-23 21:35:53,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-23 21:35:53,703 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:35:53,703 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:35:53,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 21:35:53,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:35:53,924 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_32_to_55_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_32_to_55_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-11-23 21:35:53,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:35:53,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1342380905, now seen corresponding path program 1 times [2023-11-23 21:35:53,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:35:53,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017259632] [2023-11-23 21:35:53,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:53,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:35:53,953 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:35:53,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [486287148] [2023-11-23 21:35:53,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:53,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:35:53,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:35:53,960 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:35:53,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 21:35:54,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:35:54,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-23 21:35:54,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:35:54,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 21:35:54,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 21:35:54,167 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 [2023-11-23 21:35:54,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 21:35:54,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-23 21:35:54,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:35:54,288 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:35:54,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:35:54,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017259632] [2023-11-23 21:35:54,288 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:35:54,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486287148] [2023-11-23 21:35:54,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486287148] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:35:54,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:35:54,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:35:54,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956452169] [2023-11-23 21:35:54,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:35:54,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:35:54,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:35:54,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:35:54,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:35:54,293 INFO L87 Difference]: Start difference. First operand 217 states and 285 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:35:54,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:35:54,545 INFO L93 Difference]: Finished difference Result 219 states and 286 transitions. [2023-11-23 21:35:54,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:35:54,546 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2023-11-23 21:35:54,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:35:54,549 INFO L225 Difference]: With dead ends: 219 [2023-11-23 21:35:54,549 INFO L226 Difference]: Without dead ends: 211 [2023-11-23 21:35:54,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-23 21:35:54,551 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 62 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:35:54,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 355 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:35:54,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-11-23 21:35:54,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2023-11-23 21:35:54,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 142 states have (on average 1.5211267605633803) internal successors, (216), 175 states have internal predecessors, (216), 28 states have call successors, (28), 10 states have call predecessors, (28), 11 states have return successors, (34), 27 states have call predecessors, (34), 28 states have call successors, (34) [2023-11-23 21:35:54,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 278 transitions. [2023-11-23 21:35:54,579 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 278 transitions. Word has length 32 [2023-11-23 21:35:54,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:35:54,581 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 278 transitions. [2023-11-23 21:35:54,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:35:54,582 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 278 transitions. [2023-11-23 21:35:54,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-23 21:35:54,583 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:35:54,583 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:35:54,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-23 21:35:54,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:35:54,804 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting func_to_recursive_line_41_to_52_0Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_32_to_55_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_32_to_55_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-11-23 21:35:54,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:35:54,804 INFO L85 PathProgramCache]: Analyzing trace with hash -171441529, now seen corresponding path program 1 times [2023-11-23 21:35:54,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:35:54,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157038835] [2023-11-23 21:35:54,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:54,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:35:54,826 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:35:54,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1509282850] [2023-11-23 21:35:54,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:54,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:35:54,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:35:54,836 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:35:54,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-23 21:35:54,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:35:54,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-23 21:35:54,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:35:55,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 21:35:55,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:35:55,169 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:35:55,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:35:55,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157038835] [2023-11-23 21:35:55,170 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:35:55,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509282850] [2023-11-23 21:35:55,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509282850] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:35:55,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:35:55,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 21:35:55,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068548738] [2023-11-23 21:35:55,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:35:55,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 21:35:55,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:35:55,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 21:35:55,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:35:55,174 INFO L87 Difference]: Start difference. First operand 211 states and 278 transitions. Second operand has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:35:55,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:35:55,446 INFO L93 Difference]: Finished difference Result 249 states and 301 transitions. [2023-11-23 21:35:55,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 21:35:55,447 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2023-11-23 21:35:55,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:35:55,451 INFO L225 Difference]: With dead ends: 249 [2023-11-23 21:35:55,452 INFO L226 Difference]: Without dead ends: 247 [2023-11-23 21:35:55,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-11-23 21:35:55,453 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 111 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:35:55,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 553 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:35:55,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2023-11-23 21:35:55,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 213. [2023-11-23 21:35:55,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 143 states have (on average 1.4895104895104896) internal successors, (213), 176 states have internal predecessors, (213), 28 states have call successors, (28), 10 states have call predecessors, (28), 12 states have return successors, (35), 27 states have call predecessors, (35), 28 states have call successors, (35) [2023-11-23 21:35:55,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 276 transitions. [2023-11-23 21:35:55,487 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 276 transitions. Word has length 37 [2023-11-23 21:35:55,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:35:55,488 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 276 transitions. [2023-11-23 21:35:55,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:35:55,488 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 276 transitions. [2023-11-23 21:35:55,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-23 21:35:55,491 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:35:55,491 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:35:55,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-23 21:35:55,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:35:55,704 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting func_to_recursive_line_41_to_52_0Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_32_to_55_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_32_to_55_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-11-23 21:35:55,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:35:55,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1546549495, now seen corresponding path program 1 times [2023-11-23 21:35:55,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:35:55,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885014620] [2023-11-23 21:35:55,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:55,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:35:55,727 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:35:55,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [704563208] [2023-11-23 21:35:55,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:35:55,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:35:55,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:35:55,729 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:35:55,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-23 21:35:55,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:35:55,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-23 21:35:55,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:35:55,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 21:35:55,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 21:35:56,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-23 21:35:56,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-23 21:35:56,259 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:35:56,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:35:58,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:35:58,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885014620] [2023-11-23 21:35:58,430 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:35:58,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704563208] [2023-11-23 21:35:58,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704563208] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:35:58,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:35:58,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-11-23 21:35:58,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004857067] [2023-11-23 21:35:58,431 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 21:35:58,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 21:35:58,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:35:58,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 21:35:58,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=228, Unknown=1, NotChecked=0, Total=272 [2023-11-23 21:35:58,433 INFO L87 Difference]: Start difference. First operand 213 states and 276 transitions. Second operand has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:36:00,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 21:36:02,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 21:36:04,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 21:36:06,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 21:36:08,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 21:36:11,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 21:36:13,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 21:36:13,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:36:13,178 INFO L93 Difference]: Finished difference Result 239 states and 289 transitions. [2023-11-23 21:36:13,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-23 21:36:13,179 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2023-11-23 21:36:13,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:36:13,181 INFO L225 Difference]: With dead ends: 239 [2023-11-23 21:36:13,182 INFO L226 Difference]: Without dead ends: 238 [2023-11-23 21:36:13,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=132, Invalid=623, Unknown=1, NotChecked=0, Total=756 [2023-11-23 21:36:13,184 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 244 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 35 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:36:13,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 852 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 409 Invalid, 7 Unknown, 0 Unchecked, 14.5s Time] [2023-11-23 21:36:13,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2023-11-23 21:36:13,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 213. [2023-11-23 21:36:13,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 143 states have (on average 1.4755244755244756) internal successors, (211), 176 states have internal predecessors, (211), 28 states have call successors, (28), 10 states have call predecessors, (28), 12 states have return successors, (35), 27 states have call predecessors, (35), 28 states have call successors, (35) [2023-11-23 21:36:13,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 274 transitions. [2023-11-23 21:36:13,210 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 274 transitions. Word has length 39 [2023-11-23 21:36:13,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:36:13,210 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 274 transitions. [2023-11-23 21:36:13,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:36:13,211 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 274 transitions. [2023-11-23 21:36:13,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-23 21:36:13,212 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:36:13,212 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:36:13,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-23 21:36:13,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:36:13,425 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting func_to_recursive_line_41_to_52_0Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_32_to_55_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_32_to_55_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-11-23 21:36:13,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:36:13,426 INFO L85 PathProgramCache]: Analyzing trace with hash -698394003, now seen corresponding path program 1 times [2023-11-23 21:36:13,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:36:13,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246225541] [2023-11-23 21:36:13,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:36:13,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:36:13,446 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:36:13,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [356636300] [2023-11-23 21:36:13,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:36:13,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:36:13,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:36:13,456 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:36:13,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-23 21:36:13,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:36:13,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 80 conjunts are in the unsatisfiable core [2023-11-23 21:36:13,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:36:13,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 21:36:13,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 21:36:13,641 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 [2023-11-23 21:36:13,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 21:36:13,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 21:36:13,992 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 7 treesize of output 3 [2023-11-23 21:36:14,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-23 21:36:14,034 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:36:14,034 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:36:14,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:36:14,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246225541] [2023-11-23 21:36:14,035 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:36:14,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356636300] [2023-11-23 21:36:14,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356636300] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:36:14,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:36:14,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-23 21:36:14,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74171538] [2023-11-23 21:36:14,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:36:14,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 21:36:14,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:36:14,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 21:36:14,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-23 21:36:14,037 INFO L87 Difference]: Start difference. First operand 213 states and 274 transitions. Second operand has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:36:16,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 21:36:18,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 21:36:18,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:36:18,493 INFO L93 Difference]: Finished difference Result 238 states and 287 transitions. [2023-11-23 21:36:18,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-23 21:36:18,494 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2023-11-23 21:36:18,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:36:18,496 INFO L225 Difference]: With dead ends: 238 [2023-11-23 21:36:18,496 INFO L226 Difference]: Without dead ends: 237 [2023-11-23 21:36:18,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2023-11-23 21:36:18,497 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 102 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 21 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:36:18,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 574 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 266 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2023-11-23 21:36:18,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2023-11-23 21:36:18,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 213. [2023-11-23 21:36:18,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 143 states have (on average 1.4615384615384615) internal successors, (209), 176 states have internal predecessors, (209), 28 states have call successors, (28), 10 states have call predecessors, (28), 12 states have return successors, (35), 27 states have call predecessors, (35), 28 states have call successors, (35) [2023-11-23 21:36:18,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 272 transitions. [2023-11-23 21:36:18,522 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 272 transitions. Word has length 40 [2023-11-23 21:36:18,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:36:18,522 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 272 transitions. [2023-11-23 21:36:18,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:36:18,523 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 272 transitions. [2023-11-23 21:36:18,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-23 21:36:18,523 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:36:18,523 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:36:18,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-23 21:36:18,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:36:18,736 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting func_to_recursive_line_41_to_52_0Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_32_to_55_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_32_to_55_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-11-23 21:36:18,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:36:18,737 INFO L85 PathProgramCache]: Analyzing trace with hash -991981731, now seen corresponding path program 1 times [2023-11-23 21:36:18,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:36:18,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967667087] [2023-11-23 21:36:18,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:36:18,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:36:18,799 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:36:18,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [755785024] [2023-11-23 21:36:18,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:36:18,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:36:18,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:36:18,801 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:36:18,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-23 21:36:18,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:36:18,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-23 21:36:18,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:36:18,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 21:36:19,096 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 25 treesize of output 17 [2023-11-23 21:36:19,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 21:36:19,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-23 21:36:19,315 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 21:36:19,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:36:19,497 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-23 21:36:19,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:36:19,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967667087] [2023-11-23 21:36:19,497 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:36:19,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755785024] [2023-11-23 21:36:19,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755785024] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 21:36:19,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:36:19,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 17 [2023-11-23 21:36:19,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163531634] [2023-11-23 21:36:19,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:36:19,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 21:36:19,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:36:19,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 21:36:19,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-11-23 21:36:19,499 INFO L87 Difference]: Start difference. First operand 213 states and 272 transitions. Second operand has 9 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:36:19,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:36:19,784 INFO L93 Difference]: Finished difference Result 243 states and 304 transitions. [2023-11-23 21:36:19,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 21:36:19,789 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 53 [2023-11-23 21:36:19,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:36:19,791 INFO L225 Difference]: With dead ends: 243 [2023-11-23 21:36:19,791 INFO L226 Difference]: Without dead ends: 242 [2023-11-23 21:36:19,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 80 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2023-11-23 21:36:19,794 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 82 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:36:19,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 630 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:36:19,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2023-11-23 21:36:19,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 213. [2023-11-23 21:36:19,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 143 states have (on average 1.4545454545454546) internal successors, (208), 176 states have internal predecessors, (208), 28 states have call successors, (28), 10 states have call predecessors, (28), 12 states have return successors, (35), 27 states have call predecessors, (35), 28 states have call successors, (35) [2023-11-23 21:36:19,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 271 transitions. [2023-11-23 21:36:19,823 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 271 transitions. Word has length 53 [2023-11-23 21:36:19,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:36:19,823 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 271 transitions. [2023-11-23 21:36:19,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:36:19,823 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 271 transitions. [2023-11-23 21:36:19,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-23 21:36:19,824 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:36:19,824 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:36:19,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-23 21:36:20,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-23 21:36:20,043 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting func_to_recursive_line_41_to_52_0Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_32_to_55_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_32_to_55_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-11-23 21:36:20,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:36:20,043 INFO L85 PathProgramCache]: Analyzing trace with hash -686662495, now seen corresponding path program 1 times [2023-11-23 21:36:20,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:36:20,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789058253] [2023-11-23 21:36:20,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:36:20,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:36:20,063 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:36:20,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1179613605] [2023-11-23 21:36:20,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:36:20,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:36:20,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:36:20,064 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:36:20,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-23 21:36:20,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:36:20,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-23 21:36:20,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:36:20,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 21:36:20,359 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 [2023-11-23 21:36:20,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 21:36:20,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-23 21:36:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 21:36:20,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:36:20,744 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-23 21:36:20,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:36:20,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789058253] [2023-11-23 21:36:20,744 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:36:20,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179613605] [2023-11-23 21:36:20,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179613605] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 21:36:20,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:36:20,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 17 [2023-11-23 21:36:20,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379691492] [2023-11-23 21:36:20,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:36:20,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 21:36:20,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:36:20,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 21:36:20,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-11-23 21:36:20,746 INFO L87 Difference]: Start difference. First operand 213 states and 271 transitions. Second operand has 9 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:36:21,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:36:21,030 INFO L93 Difference]: Finished difference Result 242 states and 303 transitions. [2023-11-23 21:36:21,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 21:36:21,030 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 54 [2023-11-23 21:36:21,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:36:21,032 INFO L225 Difference]: With dead ends: 242 [2023-11-23 21:36:21,032 INFO L226 Difference]: Without dead ends: 241 [2023-11-23 21:36:21,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 82 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2023-11-23 21:36:21,034 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 76 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:36:21,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 639 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:36:21,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2023-11-23 21:36:21,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 213. [2023-11-23 21:36:21,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 143 states have (on average 1.4475524475524475) internal successors, (207), 176 states have internal predecessors, (207), 28 states have call successors, (28), 10 states have call predecessors, (28), 12 states have return successors, (35), 27 states have call predecessors, (35), 28 states have call successors, (35) [2023-11-23 21:36:21,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 270 transitions. [2023-11-23 21:36:21,058 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 270 transitions. Word has length 54 [2023-11-23 21:36:21,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:36:21,059 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 270 transitions. [2023-11-23 21:36:21,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:36:21,059 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 270 transitions. [2023-11-23 21:36:21,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-23 21:36:21,060 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:36:21,060 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:36:21,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-23 21:36:21,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:36:21,280 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting func_to_recursive_line_41_to_52_0Err8ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_32_to_55_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_32_to_55_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-11-23 21:36:21,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:36:21,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1542309027, now seen corresponding path program 1 times [2023-11-23 21:36:21,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:36:21,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758041452] [2023-11-23 21:36:21,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:36:21,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:36:21,325 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:36:21,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1296222904] [2023-11-23 21:36:21,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:36:21,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:36:21,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:36:21,329 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:36:21,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-23 21:36:21,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:36:21,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-23 21:36:21,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:36:21,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 21:36:21,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-23 21:36:21,829 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-23 21:36:21,829 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:36:21,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:36:21,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758041452] [2023-11-23 21:36:21,830 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:36:21,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296222904] [2023-11-23 21:36:21,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296222904] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:36:21,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:36:21,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 21:36:21,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564215299] [2023-11-23 21:36:21,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:36:21,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 21:36:21,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:36:21,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 21:36:21,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-23 21:36:21,832 INFO L87 Difference]: Start difference. First operand 213 states and 270 transitions. Second operand has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:36:23,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 21:36:24,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:36:24,290 INFO L93 Difference]: Finished difference Result 273 states and 328 transitions. [2023-11-23 21:36:24,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 21:36:24,293 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 56 [2023-11-23 21:36:24,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:36:24,295 INFO L225 Difference]: With dead ends: 273 [2023-11-23 21:36:24,296 INFO L226 Difference]: Without dead ends: 272 [2023-11-23 21:36:24,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-11-23 21:36:24,297 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 211 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:36:24,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 544 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 275 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2023-11-23 21:36:24,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-11-23 21:36:24,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 245. [2023-11-23 21:36:24,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 168 states have (on average 1.4702380952380953) internal successors, (247), 202 states have internal predecessors, (247), 33 states have call successors, (33), 11 states have call predecessors, (33), 14 states have return successors, (43), 32 states have call predecessors, (43), 33 states have call successors, (43) [2023-11-23 21:36:24,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 323 transitions. [2023-11-23 21:36:24,326 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 323 transitions. Word has length 56 [2023-11-23 21:36:24,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:36:24,327 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 323 transitions. [2023-11-23 21:36:24,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:36:24,327 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 323 transitions. [2023-11-23 21:36:24,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-23 21:36:24,328 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:36:24,328 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:36:24,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-23 21:36:24,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-23 21:36:24,542 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting func_to_recursive_line_41_to_52_0Err9ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_32_to_55_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_32_to_55_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-11-23 21:36:24,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:36:24,543 INFO L85 PathProgramCache]: Analyzing trace with hash 566939683, now seen corresponding path program 1 times [2023-11-23 21:36:24,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:36:24,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452632479] [2023-11-23 21:36:24,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:36:24,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:36:24,562 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:36:24,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [228418443] [2023-11-23 21:36:24,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:36:24,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:36:24,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:36:24,564 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:36:24,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeeacb7f-c09a-44d8-bfd7-53212d0c364d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-23 21:36:24,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:36:24,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-23 21:36:24,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:36:24,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 21:36:24,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 21:36:24,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 21:36:24,775 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 [2023-11-23 21:36:24,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11