./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_fermat1-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 9bd2c7ff 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_214d28ab-baf9-4c49-aa52-53691ee56e15/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214d28ab-baf9-4c49-aa52-53691ee56e15/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214d28ab-baf9-4c49-aa52-53691ee56e15/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214d28ab-baf9-4c49-aa52-53691ee56e15/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_fermat1-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214d28ab-baf9-4c49-aa52-53691ee56e15/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214d28ab-baf9-4c49-aa52-53691ee56e15/bin/uautomizer-verify-uCwYo4JHxu --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 82b98e74657ce84706a43470df686c21fc227d1db1df507636ad5f146dee0144 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:47:18,671 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:47:18,791 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214d28ab-baf9-4c49-aa52-53691ee56e15/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-19 07:47:18,798 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:47:18,799 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:47:18,838 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:47:18,840 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:47:18,841 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:47:18,842 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:47:18,847 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:47:18,848 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:47:18,849 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:47:18,849 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:47:18,851 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:47:18,852 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:47:18,852 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:47:18,853 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:47:18,853 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:47:18,854 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:47:18,854 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:47:18,855 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:47:18,855 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:47:18,856 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-19 07:47:18,856 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:47:18,857 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:47:18,857 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:47:18,858 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:47:18,859 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:47:18,859 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:47:18,860 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:47:18,861 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:47:18,862 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:47:18,862 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:47:18,862 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:47:18,863 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:47:18,863 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:47:18,863 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:47:18,864 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:47:18,864 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:47:18,864 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:47:18,865 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:47:18,865 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_214d28ab-baf9-4c49-aa52-53691ee56e15/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214d28ab-baf9-4c49-aa52-53691ee56e15/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 82b98e74657ce84706a43470df686c21fc227d1db1df507636ad5f146dee0144 [2023-11-19 07:47:19,212 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:47:19,245 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:47:19,248 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:47:19,250 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:47:19,250 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:47:19,252 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214d28ab-baf9-4c49-aa52-53691ee56e15/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/recursified_nla-digbench/recursified_fermat1-ll.c [2023-11-19 07:47:22,359 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:47:22,603 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:47:22,603 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214d28ab-baf9-4c49-aa52-53691ee56e15/sv-benchmarks/c/recursified_nla-digbench/recursified_fermat1-ll.c [2023-11-19 07:47:22,613 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214d28ab-baf9-4c49-aa52-53691ee56e15/bin/uautomizer-verify-uCwYo4JHxu/data/fce54ea5d/10b98e0a25534261b606ad054e8f86b0/FLAGc5bf1bd55 [2023-11-19 07:47:22,631 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214d28ab-baf9-4c49-aa52-53691ee56e15/bin/uautomizer-verify-uCwYo4JHxu/data/fce54ea5d/10b98e0a25534261b606ad054e8f86b0 [2023-11-19 07:47:22,634 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:47:22,636 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:47:22,637 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:47:22,637 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:47:22,644 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:47:22,645 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:47:22" (1/1) ... [2023-11-19 07:47:22,646 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37c5c232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:22, skipping insertion in model container [2023-11-19 07:47:22,646 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:47:22" (1/1) ... [2023-11-19 07:47:22,673 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:47:22,899 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:47:22,913 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:47:22,950 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:47:22,966 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:47:22,966 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:22 WrapperNode [2023-11-19 07:47:22,967 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:47:22,968 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:47:22,968 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:47:22,968 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:47:22,976 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:22" (1/1) ... [2023-11-19 07:47:23,000 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:22" (1/1) ... [2023-11-19 07:47:23,026 INFO L138 Inliner]: procedures = 18, calls = 83, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 103 [2023-11-19 07:47:23,026 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:47:23,027 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:47:23,028 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:47:23,028 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:47:23,038 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:22" (1/1) ... [2023-11-19 07:47:23,038 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:22" (1/1) ... [2023-11-19 07:47:23,042 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:22" (1/1) ... [2023-11-19 07:47:23,042 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:22" (1/1) ... [2023-11-19 07:47:23,052 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:22" (1/1) ... [2023-11-19 07:47:23,063 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:22" (1/1) ... [2023-11-19 07:47:23,066 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:22" (1/1) ... [2023-11-19 07:47:23,068 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:22" (1/1) ... [2023-11-19 07:47:23,072 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:47:23,073 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:47:23,074 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:47:23,074 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:47:23,075 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:22" (1/1) ... [2023-11-19 07:47:23,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:47:23,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214d28ab-baf9-4c49-aa52-53691ee56e15/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:23,115 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214d28ab-baf9-4c49-aa52-53691ee56e15/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:47:23,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214d28ab-baf9-4c49-aa52-53691ee56e15/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:47:23,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:47:23,161 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_36_0 [2023-11-19 07:47:23,161 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_36_0 [2023-11-19 07:47:23,161 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:47:23,162 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:47:23,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:47:23,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:47:23,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:47:23,162 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_38_to_43_0 [2023-11-19 07:47:23,162 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_38_to_43_0 [2023-11-19 07:47:23,162 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_46_to_51_0 [2023-11-19 07:47:23,162 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_46_to_51_0 [2023-11-19 07:47:23,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:47:23,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:47:23,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:47:23,163 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-19 07:47:23,163 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-19 07:47:23,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:47:23,276 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:47:23,279 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:47:24,089 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:47:24,103 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:47:24,103 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 07:47:24,109 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:47:24 BoogieIcfgContainer [2023-11-19 07:47:24,110 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:47:24,113 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:47:24,113 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:47:24,117 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:47:24,117 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:47:22" (1/3) ... [2023-11-19 07:47:24,118 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c8018d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:47:24, skipping insertion in model container [2023-11-19 07:47:24,119 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:22" (2/3) ... [2023-11-19 07:47:24,119 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c8018d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:47:24, skipping insertion in model container [2023-11-19 07:47:24,120 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:47:24" (3/3) ... [2023-11-19 07:47:24,121 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_fermat1-ll.c [2023-11-19 07:47:24,144 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:47:24,144 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 92 error locations. [2023-11-19 07:47:24,214 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:47:24,222 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;@6737019c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:47:24,222 INFO L358 AbstractCegarLoop]: Starting to check reachability of 92 error locations. [2023-11-19 07:47:24,228 INFO L276 IsEmpty]: Start isEmpty. Operand has 233 states, 123 states have (on average 1.8130081300813008) internal successors, (223), 218 states have internal predecessors, (223), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-19 07:47:24,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-19 07:47:24,236 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:47:24,237 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-19 07:47:24,238 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_38_to_43_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_38_to_43_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 90 more)] === [2023-11-19 07:47:24,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:24,245 INFO L85 PathProgramCache]: Analyzing trace with hash 199659, now seen corresponding path program 1 times [2023-11-19 07:47:24,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:24,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932533732] [2023-11-19 07:47:24,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:24,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:24,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:24,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:24,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:24,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932533732] [2023-11-19 07:47:24,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932533732] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:24,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:24,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:47:24,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279155121] [2023-11-19 07:47:24,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:24,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:47:24,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:24,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:47:24,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:47:24,566 INFO L87 Difference]: Start difference. First operand has 233 states, 123 states have (on average 1.8130081300813008) internal successors, (223), 218 states have internal predecessors, (223), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:24,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:47:24,742 INFO L93 Difference]: Finished difference Result 447 states and 489 transitions. [2023-11-19 07:47:24,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:47:24,751 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-19 07:47:24,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:47:24,770 INFO L225 Difference]: With dead ends: 447 [2023-11-19 07:47:24,770 INFO L226 Difference]: Without dead ends: 220 [2023-11-19 07:47:24,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:47:24,787 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 58 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:47:24,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 384 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:47:24,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2023-11-19 07:47:24,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2023-11-19 07:47:24,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 118 states have (on average 1.7457627118644068) internal successors, (206), 206 states have internal predecessors, (206), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-19 07:47:24,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 228 transitions. [2023-11-19 07:47:24,856 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 228 transitions. Word has length 3 [2023-11-19 07:47:24,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:47:24,857 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 228 transitions. [2023-11-19 07:47:24,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:24,857 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 228 transitions. [2023-11-19 07:47:24,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-19 07:47:24,857 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:47:24,858 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-19 07:47:24,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:47:24,858 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_38_to_43_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_38_to_43_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 90 more)] === [2023-11-19 07:47:24,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:24,859 INFO L85 PathProgramCache]: Analyzing trace with hash 6189636, now seen corresponding path program 1 times [2023-11-19 07:47:24,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:24,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268870132] [2023-11-19 07:47:24,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:24,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:24,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:24,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:24,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:24,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268870132] [2023-11-19 07:47:24,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268870132] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:24,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:24,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:47:24,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031304230] [2023-11-19 07:47:24,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:24,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:47:24,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:24,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:47:24,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:47:24,929 INFO L87 Difference]: Start difference. First operand 220 states and 228 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:24,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:47:24,976 INFO L93 Difference]: Finished difference Result 220 states and 228 transitions. [2023-11-19 07:47:24,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:47:24,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-19 07:47:24,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:47:24,979 INFO L225 Difference]: With dead ends: 220 [2023-11-19 07:47:24,979 INFO L226 Difference]: Without dead ends: 216 [2023-11-19 07:47:24,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:47:24,981 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 51 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:47:24,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 374 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:47:24,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-11-19 07:47:25,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2023-11-19 07:47:25,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 118 states have (on average 1.7118644067796611) internal successors, (202), 202 states have internal predecessors, (202), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-19 07:47:25,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 224 transitions. [2023-11-19 07:47:25,005 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 224 transitions. Word has length 4 [2023-11-19 07:47:25,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:47:25,005 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 224 transitions. [2023-11-19 07:47:25,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:25,006 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 224 transitions. [2023-11-19 07:47:25,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-19 07:47:25,006 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:47:25,007 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:25,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:47:25,007 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_38_to_43_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_38_to_43_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 90 more)] === [2023-11-19 07:47:25,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:25,008 INFO L85 PathProgramCache]: Analyzing trace with hash -336206712, now seen corresponding path program 1 times [2023-11-19 07:47:25,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:25,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374632531] [2023-11-19 07:47:25,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:25,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:25,032 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:47:25,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1719572599] [2023-11-19 07:47:25,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:25,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:25,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214d28ab-baf9-4c49-aa52-53691ee56e15/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:25,040 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214d28ab-baf9-4c49-aa52-53691ee56e15/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:25,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214d28ab-baf9-4c49-aa52-53691ee56e15/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:47:25,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:25,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:47:25,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:25,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:25,247 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:47:25,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:25,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374632531] [2023-11-19 07:47:25,248 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:47:25,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719572599] [2023-11-19 07:47:25,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719572599] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:25,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:25,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:47:25,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097332625] [2023-11-19 07:47:25,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:25,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:47:25,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:25,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:47:25,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:47:25,251 INFO L87 Difference]: Start difference. First operand 216 states and 224 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:25,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:47:25,297 INFO L93 Difference]: Finished difference Result 216 states and 224 transitions. [2023-11-19 07:47:25,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:47:25,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-19 07:47:25,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:47:25,303 INFO L225 Difference]: With dead ends: 216 [2023-11-19 07:47:25,304 INFO L226 Difference]: Without dead ends: 214 [2023-11-19 07:47:25,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:47:25,312 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 45 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:47:25,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 374 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:47:25,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-11-19 07:47:25,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2023-11-19 07:47:25,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 118 states have (on average 1.694915254237288) internal successors, (200), 200 states have internal predecessors, (200), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-19 07:47:25,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 222 transitions. [2023-11-19 07:47:25,352 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 222 transitions. Word has length 8 [2023-11-19 07:47:25,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:47:25,354 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 222 transitions. [2023-11-19 07:47:25,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:25,354 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 222 transitions. [2023-11-19 07:47:25,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-19 07:47:25,356 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:47:25,356 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:25,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214d28ab-baf9-4c49-aa52-53691ee56e15/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:25,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214d28ab-baf9-4c49-aa52-53691ee56e15/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:25,580 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_38_to_43_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_38_to_43_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 90 more)] === [2023-11-19 07:47:25,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:25,581 INFO L85 PathProgramCache]: Analyzing trace with hash 18953151, now seen corresponding path program 1 times [2023-11-19 07:47:25,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:25,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759902540] [2023-11-19 07:47:25,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:25,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:25,622 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:47:25,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1892933038] [2023-11-19 07:47:25,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:25,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:25,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214d28ab-baf9-4c49-aa52-53691ee56e15/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:25,627 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214d28ab-baf9-4c49-aa52-53691ee56e15/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:25,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214d28ab-baf9-4c49-aa52-53691ee56e15/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:47:25,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:25,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:47:25,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:25,859 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-19 07:47:25,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 87 [2023-11-19 07:47:25,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2023-11-19 07:47:26,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2023-11-19 07:47:26,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-19 07:47:26,285 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 [2023-11-19 07:47:26,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:47:26,295 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:47:26,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:26,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759902540] [2023-11-19 07:47:26,296 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:47:26,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892933038] [2023-11-19 07:47:26,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892933038] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:26,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:26,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:47:26,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382105731] [2023-11-19 07:47:26,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:26,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:47:26,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:26,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:47:26,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:47:26,301 INFO L87 Difference]: Start difference. First operand 214 states and 222 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:47:28,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-19 07:47:30,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 07:47:32,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 07:47:34,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 07:47:36,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 07:47:36,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:47:36,573 INFO L93 Difference]: Finished difference Result 214 states and 222 transitions. [2023-11-19 07:47:36,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:47:36,574 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2023-11-19 07:47:36,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:47:36,576 INFO L225 Difference]: With dead ends: 214 [2023-11-19 07:47:36,576 INFO L226 Difference]: Without dead ends: 213 [2023-11-19 07:47:36,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:47:36,578 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 6 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:47:36,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 760 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 5 Unknown, 0 Unchecked, 10.2s Time] [2023-11-19 07:47:36,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-11-19 07:47:36,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2023-11-19 07:47:36,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 118 states have (on average 1.6864406779661016) internal successors, (199), 199 states have internal predecessors, (199), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-19 07:47:36,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 221 transitions. [2023-11-19 07:47:36,604 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 221 transitions. Word has length 27 [2023-11-19 07:47:36,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:47:36,605 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 221 transitions. [2023-11-19 07:47:36,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:47:36,606 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 221 transitions. [2023-11-19 07:47:36,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-19 07:47:36,607 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:47:36,608 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:36,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214d28ab-baf9-4c49-aa52-53691ee56e15/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-19 07:47:36,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214d28ab-baf9-4c49-aa52-53691ee56e15/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:36,809 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_38_to_43_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_38_to_43_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 90 more)] === [2023-11-19 07:47:36,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:36,810 INFO L85 PathProgramCache]: Analyzing trace with hash 587547916, now seen corresponding path program 1 times [2023-11-19 07:47:36,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:36,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708899376] [2023-11-19 07:47:36,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:36,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:36,838 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:47:36,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139246132] [2023-11-19 07:47:36,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:36,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:36,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214d28ab-baf9-4c49-aa52-53691ee56e15/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:36,848 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214d28ab-baf9-4c49-aa52-53691ee56e15/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:36,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214d28ab-baf9-4c49-aa52-53691ee56e15/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:47:36,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:36,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-19 07:47:36,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:36,978 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-19 07:47:36,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-11-19 07:47:36,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2023-11-19 07:47:40,116 INFO L349 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2023-11-19 07:47:40,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 64 [2023-11-19 07:47:40,170 INFO L349 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2023-11-19 07:47:40,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 55 [2023-11-19 07:47:40,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 11 [2023-11-19 07:47:40,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2023-11-19 07:47:40,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:40,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:47:42,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:42,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708899376] [2023-11-19 07:47:42,540 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:47:42,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139246132] [2023-11-19 07:47:42,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139246132] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:47:42,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:47:42,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-11-19 07:47:42,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013355526] [2023-11-19 07:47:42,541 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 07:47:42,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:47:42,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:42,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:47:42,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=141, Unknown=3, NotChecked=0, Total=182 [2023-11-19 07:47:42,542 INFO L87 Difference]: Start difference. First operand 213 states and 221 transitions. Second operand has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 07:47:44,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-19 07:47:46,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-19 07:47:49,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-19 07:47:51,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-19 07:47:53,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-19 07:47:55,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-19 07:47:57,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-19 07:47:59,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-19 07:48:01,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-19 07:48:04,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-19 07:48:06,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-19 07:48:08,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-19 07:48:10,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-19 07:48:12,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-19 07:48:14,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-19 07:48:16,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-19 07:48:18,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-19 07:48:18,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:18,159 INFO L93 Difference]: Finished difference Result 217 states and 224 transitions. [2023-11-19 07:48:18,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:48:18,161 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2023-11-19 07:48:18,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:18,163 INFO L225 Difference]: With dead ends: 217 [2023-11-19 07:48:18,163 INFO L226 Difference]: Without dead ends: 216 [2023-11-19 07:48:18,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=83, Invalid=294, Unknown=3, NotChecked=0, Total=380 [2023-11-19 07:48:18,164 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 41 mSDsluCounter, 1427 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 3 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 1625 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:18,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 1625 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 271 Invalid, 17 Unknown, 0 Unchecked, 35.3s Time] [2023-11-19 07:48:18,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-11-19 07:48:18,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2023-11-19 07:48:18,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 121 states have (on average 1.6611570247933884) internal successors, (201), 201 states have internal predecessors, (201), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-19 07:48:18,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 223 transitions. [2023-11-19 07:48:18,185 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 223 transitions. Word has length 28 [2023-11-19 07:48:18,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:18,185 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 223 transitions. [2023-11-19 07:48:18,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 07:48:18,186 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 223 transitions. [2023-11-19 07:48:18,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-19 07:48:18,188 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:18,189 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] [2023-11-19 07:48:18,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214d28ab-baf9-4c49-aa52-53691ee56e15/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:18,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214d28ab-baf9-4c49-aa52-53691ee56e15/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:18,396 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting func_to_recursive_line_33_to_36_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_38_to_43_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_38_to_43_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 90 more)] === [2023-11-19 07:48:18,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:18,397 INFO L85 PathProgramCache]: Analyzing trace with hash -434811289, now seen corresponding path program 1 times [2023-11-19 07:48:18,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:18,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554063395] [2023-11-19 07:48:18,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:18,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:18,417 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:48:18,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [802958260] [2023-11-19 07:48:18,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:18,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:18,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214d28ab-baf9-4c49-aa52-53691ee56e15/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:18,431 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214d28ab-baf9-4c49-aa52-53691ee56e15/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:18,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214d28ab-baf9-4c49-aa52-53691ee56e15/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:48:18,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:18,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-19 07:48:18,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:18,571 INFO L349 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2023-11-19 07:48:18,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 176 treesize of output 174 [2023-11-19 07:48:18,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2023-11-19 07:48:18,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-11-19 07:48:18,767 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-19 07:48:18,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2023-11-19 07:48:18,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 9 treesize of output 7 [2023-11-19 07:48:18,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2023-11-19 07:48:18,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2023-11-19 07:48:18,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:48:18,949 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:48:18,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:18,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554063395] [2023-11-19 07:48:18,949 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:48:18,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802958260] [2023-11-19 07:48:18,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802958260] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:18,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:18,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 07:48:18,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812636421] [2023-11-19 07:48:18,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:18,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 07:48:18,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:18,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 07:48:18,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:48:18,953 INFO L87 Difference]: Start difference. First operand 216 states and 223 transitions. Second operand has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:48:19,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:19,544 INFO L93 Difference]: Finished difference Result 293 states and 302 transitions. [2023-11-19 07:48:19,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:48:19,545 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2023-11-19 07:48:19,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:19,549 INFO L225 Difference]: With dead ends: 293 [2023-11-19 07:48:19,549 INFO L226 Difference]: Without dead ends: 291 [2023-11-19 07:48:19,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:48:19,551 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 214 mSDsluCounter, 1202 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 1398 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:19,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 1398 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:48:19,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2023-11-19 07:48:19,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 241. [2023-11-19 07:48:19,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 144 states have (on average 1.6736111111111112) internal successors, (241), 224 states have internal predecessors, (241), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2023-11-19 07:48:19,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 266 transitions. [2023-11-19 07:48:19,566 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 266 transitions. Word has length 32 [2023-11-19 07:48:19,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:19,567 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 266 transitions. [2023-11-19 07:48:19,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:48:19,568 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 266 transitions. [2023-11-19 07:48:19,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-19 07:48:19,569 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:19,569 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:19,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214d28ab-baf9-4c49-aa52-53691ee56e15/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:19,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214d28ab-baf9-4c49-aa52-53691ee56e15/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:19,791 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting func_to_recursive_line_33_to_36_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_38_to_43_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_38_to_43_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 90 more)] === [2023-11-19 07:48:19,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:19,791 INFO L85 PathProgramCache]: Analyzing trace with hash -594247916, now seen corresponding path program 1 times [2023-11-19 07:48:19,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:19,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612090281] [2023-11-19 07:48:19,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:19,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:19,809 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:48:19,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [675780728] [2023-11-19 07:48:19,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:19,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:19,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214d28ab-baf9-4c49-aa52-53691ee56e15/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:19,811 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214d28ab-baf9-4c49-aa52-53691ee56e15/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:19,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214d28ab-baf9-4c49-aa52-53691ee56e15/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:48:19,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:19,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-19 07:48:19,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:19,946 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 [2023-11-19 07:48:19,962 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-19 07:48:19,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 136 [2023-11-19 07:48:20,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 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 [2023-11-19 07:48:20,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2023-11-19 07:48:26,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2023-11-19 07:48:28,885 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main_~R~0#1| Int)) (let ((.cse0 (* |ULTIMATE.start_main_~R~0#1| |ULTIMATE.start_main_~R~0#1|))) (and (<= (+ |c_func_to_recursive_line_33_to_36_0_#t~mem29| |c_func_to_recursive_line_33_to_36_0_#t~mem28|) .cse0) (<= .cse0 (+ 2147483645 (* 2 |ULTIMATE.start_main_~R~0#1|)))))) is different from true [2023-11-19 07:48:28,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:48:28,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:48:29,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37