./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_hard2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc 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_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_hard2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8571897e57404ad6e85df2c29745d5b56fa4d168673d3bc7c670c79b03a6c106 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 13:17:29,056 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 13:17:29,118 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-12-02 13:17:29,123 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 13:17:29,123 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 13:17:29,148 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 13:17:29,149 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 13:17:29,149 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 13:17:29,150 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 13:17:29,150 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 13:17:29,151 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 13:17:29,152 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 13:17:29,152 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 13:17:29,153 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 13:17:29,153 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 13:17:29,154 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 13:17:29,154 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 13:17:29,155 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 13:17:29,155 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 13:17:29,156 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 13:17:29,156 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 13:17:29,157 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 13:17:29,158 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 13:17:29,158 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 13:17:29,159 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 13:17:29,159 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 13:17:29,159 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 13:17:29,160 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 13:17:29,160 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 13:17:29,161 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 13:17:29,161 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 13:17:29,161 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-12-02 13:17:29,162 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 13:17:29,162 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 13:17:29,162 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 13:17:29,162 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 13:17:29,162 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 13:17:29,163 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 13:17:29,163 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 13:17:29,163 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:17:29,163 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 13:17:29,164 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 13:17:29,164 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 13:17:29,164 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 13:17:29,164 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 13:17:29,164 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 13:17:29,165 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 13:17:29,165 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 13:17:29,165 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 13:17:29,165 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8571897e57404ad6e85df2c29745d5b56fa4d168673d3bc7c670c79b03a6c106 [2023-12-02 13:17:29,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 13:17:29,380 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 13:17:29,383 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 13:17:29,384 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 13:17:29,384 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 13:17:29,386 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/recursified_nla-digbench/recursified_hard2.c [2023-12-02 13:17:32,069 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 13:17:32,228 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 13:17:32,228 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/sv-benchmarks/c/recursified_nla-digbench/recursified_hard2.c [2023-12-02 13:17:32,236 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/data/a3d49c3bd/0159a89985824dbea3db95ef0b444f0a/FLAG28f7bdb71 [2023-12-02 13:17:32,249 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/data/a3d49c3bd/0159a89985824dbea3db95ef0b444f0a [2023-12-02 13:17:32,251 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 13:17:32,252 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 13:17:32,254 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 13:17:32,254 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 13:17:32,258 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 13:17:32,259 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:17:32" (1/1) ... [2023-12-02 13:17:32,260 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44cd819c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:17:32, skipping insertion in model container [2023-12-02 13:17:32,260 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:17:32" (1/1) ... [2023-12-02 13:17:32,282 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 13:17:32,425 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:17:32,436 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 13:17:32,461 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:17:32,473 INFO L206 MainTranslator]: Completed translation [2023-12-02 13:17:32,474 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:17:32 WrapperNode [2023-12-02 13:17:32,474 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 13:17:32,475 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 13:17:32,475 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 13:17:32,475 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 13:17:32,481 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:17:32" (1/1) ... [2023-12-02 13:17:32,490 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:17:32" (1/1) ... [2023-12-02 13:17:32,513 INFO L138 Inliner]: procedures = 17, calls = 91, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 88 [2023-12-02 13:17:32,513 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 13:17:32,514 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 13:17:32,514 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 13:17:32,514 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 13:17:32,522 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:17:32" (1/1) ... [2023-12-02 13:17:32,522 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:17:32" (1/1) ... [2023-12-02 13:17:32,526 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:17:32" (1/1) ... [2023-12-02 13:17:32,526 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:17:32" (1/1) ... [2023-12-02 13:17:32,535 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:17:32" (1/1) ... [2023-12-02 13:17:32,538 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:17:32" (1/1) ... [2023-12-02 13:17:32,540 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:17:32" (1/1) ... [2023-12-02 13:17:32,542 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:17:32" (1/1) ... [2023-12-02 13:17:32,546 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 13:17:32,547 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 13:17:32,547 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 13:17:32,547 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 13:17:32,548 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:17:32" (1/1) ... [2023-12-02 13:17:32,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:17:32,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:17:32,580 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 13:17:32,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 13:17:32,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 13:17:32,616 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_40_to_50_0 [2023-12-02 13:17:32,616 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_40_to_50_0 [2023-12-02 13:17:32,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 13:17:32,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 13:17:32,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 13:17:32,617 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_30_to_37_0 [2023-12-02 13:17:32,617 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_30_to_37_0 [2023-12-02 13:17:32,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 13:17:32,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 13:17:32,618 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 13:17:32,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 13:17:32,618 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 13:17:32,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 13:17:32,734 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 13:17:32,736 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 13:17:33,034 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 13:17:33,066 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 13:17:33,066 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 13:17:33,068 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:17:33 BoogieIcfgContainer [2023-12-02 13:17:33,068 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 13:17:33,071 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 13:17:33,072 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 13:17:33,075 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 13:17:33,075 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:17:32" (1/3) ... [2023-12-02 13:17:33,076 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2589c32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:17:33, skipping insertion in model container [2023-12-02 13:17:33,076 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:17:32" (2/3) ... [2023-12-02 13:17:33,077 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2589c32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:17:33, skipping insertion in model container [2023-12-02 13:17:33,077 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:17:33" (3/3) ... [2023-12-02 13:17:33,089 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_hard2.c [2023-12-02 13:17:33,104 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 13:17:33,104 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2023-12-02 13:17:33,147 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 13:17:33,154 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=FINITE_AUTOMATA, 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;@4b68c298, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 13:17:33,154 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2023-12-02 13:17:33,157 INFO L276 IsEmpty]: Start isEmpty. Operand has 82 states, 43 states have (on average 1.6744186046511629) internal successors, (72), 69 states have internal predecessors, (72), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-02 13:17:33,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 13:17:33,164 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:17:33,164 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:17:33,165 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting func_to_recursive_line_40_to_50_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_40_to_50_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_40_to_50_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-12-02 13:17:33,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:17:33,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1657639900, now seen corresponding path program 1 times [2023-12-02 13:17:33,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:17:33,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952930173] [2023-12-02 13:17:33,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:17:33,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:17:33,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:17:33,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:17:33,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952930173] [2023-12-02 13:17:33,359 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-02 13:17:33,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118159947] [2023-12-02 13:17:33,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:17:33,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:17:33,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:17:33,361 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:17:33,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 13:17:33,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:17:33,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-02 13:17:33,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:17:33,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:17:33,519 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:17:33,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118159947] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:17:33,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:17:33,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 13:17:33,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389338736] [2023-12-02 13:17:33,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:17:33,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 13:17:33,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:17:33,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 13:17:33,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 13:17:33,558 INFO L87 Difference]: Start difference. First operand has 82 states, 43 states have (on average 1.6744186046511629) internal successors, (72), 69 states have internal predecessors, (72), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:17:33,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:17:33,605 INFO L93 Difference]: Finished difference Result 140 states and 161 transitions. [2023-12-02 13:17:33,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 13:17:33,607 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-12-02 13:17:33,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:17:33,616 INFO L225 Difference]: With dead ends: 140 [2023-12-02 13:17:33,616 INFO L226 Difference]: Without dead ends: 77 [2023-12-02 13:17:33,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 13:17:33,623 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:17:33,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:17:33,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-12-02 13:17:33,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2023-12-02 13:17:33,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 41 states have (on average 1.6341463414634145) internal successors, (67), 66 states have internal predecessors, (67), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 13:17:33,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2023-12-02 13:17:33,668 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 10 [2023-12-02 13:17:33,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:17:33,668 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2023-12-02 13:17:33,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:17:33,669 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2023-12-02 13:17:33,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 13:17:33,670 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:17:33,670 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:17:33,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 13:17:33,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-02 13:17:33,878 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting func_to_recursive_line_30_to_37_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_40_to_50_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_40_to_50_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-12-02 13:17:33,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:17:33,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1226833833, now seen corresponding path program 1 times [2023-12-02 13:17:33,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:17:33,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259570824] [2023-12-02 13:17:33,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:17:33,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:17:33,930 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:17:33,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [800266545] [2023-12-02 13:17:33,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:17:33,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:17:33,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:17:33,932 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:17:33,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 13:17:34,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:17:34,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 54 conjunts are in the unsatisfiable core [2023-12-02 13:17:34,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:17:34,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:17:34,368 INFO L349 Elim1Store]: treesize reduction 85, result has 30.9 percent of original size [2023-12-02 13:17:34,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 552 treesize of output 188 [2023-12-02 13:17:34,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:17:34,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:17:34,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:17:34,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:17:34,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:17:34,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:17:34,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:17:34,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:17:34,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:17:34,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:17:34,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:17:34,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:17:34,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:17:34,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:17:34,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:17:34,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:17:34,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:17:34,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:17:35,498 INFO L349 Elim1Store]: treesize reduction 449, result has 17.0 percent of original size [2023-12-02 13:17:35,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 5 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 480 treesize of output 911 [2023-12-02 13:17:35,881 INFO L224 Elim1Store]: Index analysis took 107 ms [2023-12-02 13:17:35,894 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2023-12-02 13:17:35,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2472 treesize of output 2448 [2023-12-02 13:17:36,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 22 [2023-12-02 13:17:36,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 26 [2023-12-02 13:17:39,880 INFO L349 Elim1Store]: treesize reduction 38, result has 19.1 percent of original size [2023-12-02 13:17:39,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 771 treesize of output 673 [2023-12-02 13:17:40,843 INFO L349 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2023-12-02 13:17:40,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 1219 treesize of output 1078 [2023-12-02 13:17:41,446 INFO L349 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2023-12-02 13:17:41,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 91 treesize of output 100 [2023-12-02 13:17:41,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:17:41,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 19 treesize of output 15 [2023-12-02 13:17:41,738 INFO L349 Elim1Store]: treesize reduction 38, result has 19.1 percent of original size [2023-12-02 13:17:41,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1191 treesize of output 1055 [2023-12-02 13:17:42,368 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 13:17:42,406 INFO L349 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2023-12-02 13:17:42,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 38 [2023-12-02 13:17:49,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 209 treesize of output 253 [2023-12-02 13:17:49,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:17:49,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259570824] [2023-12-02 13:17:49,119 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:17:49,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800266545] [2023-12-02 13:17:49,119 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no need to replace index [2023-12-02 13:17:49,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [585969520] [2023-12-02 13:17:49,136 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-12-02 13:17:49,136 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:17:49,139 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:17:49,144 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:17:49,145 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:17:49,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 13:17:49,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:17:49,368 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Script currently locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@1aed631d at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.assertScriptNotLocked(ManagedScript.java:109) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:282) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminateLight(PartialQuantifierElimination.java:62) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$TermDomainOperationProviderWithLightElimination.newQuantifier(SymbolicTools.java:284) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$TermDomainOperationProviderWithLightElimination.projectExistentially(SymbolicTools.java:270) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:117) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 13:17:49,371 INFO L158 Benchmark]: Toolchain (without parser) took 17118.25ms. Allocated memory was 174.1MB in the beginning and 302.0MB in the end (delta: 127.9MB). Free memory was 136.9MB in the beginning and 251.4MB in the end (delta: -114.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-12-02 13:17:49,371 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 104.9MB. Free memory is still 52.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 13:17:49,371 INFO L158 Benchmark]: CACSL2BoogieTranslator took 220.72ms. Allocated memory is still 174.1MB. Free memory was 136.9MB in the beginning and 125.5MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-12-02 13:17:49,372 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.70ms. Allocated memory is still 174.1MB. Free memory was 125.5MB in the beginning and 123.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 13:17:49,372 INFO L158 Benchmark]: Boogie Preprocessor took 31.96ms. Allocated memory is still 174.1MB. Free memory was 123.4MB in the beginning and 122.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 13:17:49,372 INFO L158 Benchmark]: RCFGBuilder took 521.47ms. Allocated memory is still 174.1MB. Free memory was 122.2MB in the beginning and 98.7MB in the end (delta: 23.5MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2023-12-02 13:17:49,373 INFO L158 Benchmark]: TraceAbstraction took 16298.82ms. Allocated memory was 174.1MB in the beginning and 302.0MB in the end (delta: 127.9MB). Free memory was 98.3MB in the beginning and 251.4MB in the end (delta: -153.2MB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 13:17:49,374 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 104.9MB. Free memory is still 52.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 220.72ms. Allocated memory is still 174.1MB. Free memory was 136.9MB in the beginning and 125.5MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.70ms. Allocated memory is still 174.1MB. Free memory was 125.5MB in the beginning and 123.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 31.96ms. Allocated memory is still 174.1MB. Free memory was 123.4MB in the beginning and 122.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 521.47ms. Allocated memory is still 174.1MB. Free memory was 122.2MB in the beginning and 98.7MB in the end (delta: 23.5MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 16298.82ms. Allocated memory was 174.1MB in the beginning and 302.0MB in the end (delta: 127.9MB). Free memory was 98.3MB in the beginning and 251.4MB in the end (delta: -153.2MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Script currently locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@1aed631d de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Script currently locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@1aed631d: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.assertScriptNotLocked(ManagedScript.java:109) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2023-12-02 13:17:49,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_hard2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8571897e57404ad6e85df2c29745d5b56fa4d168673d3bc7c670c79b03a6c106 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 13:17:51,391 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 13:17:51,471 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-32bit-Taipan_Bitvector.epf [2023-12-02 13:17:51,478 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 13:17:51,478 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 13:17:51,507 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 13:17:51,507 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 13:17:51,508 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 13:17:51,509 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 13:17:51,509 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 13:17:51,510 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 13:17:51,510 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 13:17:51,511 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 13:17:51,511 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 13:17:51,512 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 13:17:51,512 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 13:17:51,513 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 13:17:51,514 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 13:17:51,514 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 13:17:51,515 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 13:17:51,515 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 13:17:51,516 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 13:17:51,517 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 13:17:51,517 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 13:17:51,517 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 13:17:51,518 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-02 13:17:51,518 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-12-02 13:17:51,519 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-02 13:17:51,519 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 13:17:51,520 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 13:17:51,520 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 13:17:51,520 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 13:17:51,521 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 13:17:51,521 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-02 13:17:51,521 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 13:17:51,521 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 13:17:51,522 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:17:51,522 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 13:17:51,522 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 13:17:51,522 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 13:17:51,522 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-12-02 13:17:51,525 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-02 13:17:51,525 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 13:17:51,525 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 13:17:51,526 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 13:17:51,526 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 13:17:51,526 INFO L153 SettingsManager]: * Logic for external solver=AUFBV 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_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8571897e57404ad6e85df2c29745d5b56fa4d168673d3bc7c670c79b03a6c106 [2023-12-02 13:17:51,809 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 13:17:51,826 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 13:17:51,828 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 13:17:51,829 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 13:17:51,829 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 13:17:51,831 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/recursified_nla-digbench/recursified_hard2.c [2023-12-02 13:17:54,635 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 13:17:54,821 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 13:17:54,822 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/sv-benchmarks/c/recursified_nla-digbench/recursified_hard2.c [2023-12-02 13:17:54,829 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/data/3447c22e0/200722b117c2466795f72b882decd81c/FLAGbaf3070d7 [2023-12-02 13:17:54,844 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/data/3447c22e0/200722b117c2466795f72b882decd81c [2023-12-02 13:17:54,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 13:17:54,849 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 13:17:54,850 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 13:17:54,850 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 13:17:54,855 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 13:17:54,856 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:17:54" (1/1) ... [2023-12-02 13:17:54,858 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c67523e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:17:54, skipping insertion in model container [2023-12-02 13:17:54,858 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:17:54" (1/1) ... [2023-12-02 13:17:54,882 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 13:17:55,050 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:17:55,063 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 13:17:55,092 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:17:55,107 INFO L206 MainTranslator]: Completed translation [2023-12-02 13:17:55,108 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:17:55 WrapperNode [2023-12-02 13:17:55,108 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 13:17:55,109 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 13:17:55,109 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 13:17:55,109 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 13:17:55,115 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:17:55" (1/1) ... [2023-12-02 13:17:55,126 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:17:55" (1/1) ... [2023-12-02 13:17:55,149 INFO L138 Inliner]: procedures = 19, calls = 91, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 87 [2023-12-02 13:17:55,150 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 13:17:55,150 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 13:17:55,151 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 13:17:55,151 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 13:17:55,159 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:17:55" (1/1) ... [2023-12-02 13:17:55,159 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:17:55" (1/1) ... [2023-12-02 13:17:55,164 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:17:55" (1/1) ... [2023-12-02 13:17:55,164 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:17:55" (1/1) ... [2023-12-02 13:17:55,176 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:17:55" (1/1) ... [2023-12-02 13:17:55,179 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:17:55" (1/1) ... [2023-12-02 13:17:55,182 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:17:55" (1/1) ... [2023-12-02 13:17:55,183 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:17:55" (1/1) ... [2023-12-02 13:17:55,188 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 13:17:55,189 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 13:17:55,189 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 13:17:55,190 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 13:17:55,191 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:17:55" (1/1) ... [2023-12-02 13:17:55,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:17:55,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:17:55,219 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 13:17:55,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 13:17:55,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 13:17:55,257 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_40_to_50_0 [2023-12-02 13:17:55,257 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_40_to_50_0 [2023-12-02 13:17:55,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-12-02 13:17:55,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 13:17:55,258 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-12-02 13:17:55,258 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_30_to_37_0 [2023-12-02 13:17:55,258 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_30_to_37_0 [2023-12-02 13:17:55,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 13:17:55,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 13:17:55,259 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 13:17:55,259 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 13:17:55,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 13:17:55,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-12-02 13:17:55,354 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 13:17:55,356 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 13:17:57,104 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 13:17:57,137 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 13:17:57,138 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 13:17:57,138 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:17:57 BoogieIcfgContainer [2023-12-02 13:17:57,138 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 13:17:57,141 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 13:17:57,141 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 13:17:57,144 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 13:17:57,144 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:17:54" (1/3) ... [2023-12-02 13:17:57,145 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b64575c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:17:57, skipping insertion in model container [2023-12-02 13:17:57,145 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:17:55" (2/3) ... [2023-12-02 13:17:57,146 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b64575c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:17:57, skipping insertion in model container [2023-12-02 13:17:57,146 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:17:57" (3/3) ... [2023-12-02 13:17:57,147 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_hard2.c [2023-12-02 13:17:57,161 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 13:17:57,161 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2023-12-02 13:17:57,203 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 13:17:57,208 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=FINITE_AUTOMATA, 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;@4aaf5f2a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 13:17:57,208 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2023-12-02 13:17:57,211 INFO L276 IsEmpty]: Start isEmpty. Operand has 84 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 71 states have internal predecessors, (75), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-02 13:17:57,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 13:17:57,218 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:17:57,219 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:17:57,219 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting func_to_recursive_line_40_to_50_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_40_to_50_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_40_to_50_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-12-02 13:17:57,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:17:57,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1657639900, now seen corresponding path program 1 times [2023-12-02 13:17:57,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:17:57,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1577880605] [2023-12-02 13:17:57,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:17:57,236 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:17:57,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:17:57,237 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:17:57,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-12-02 13:17:57,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:17:57,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-02 13:17:57,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:17:57,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:17:57,425 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:17:57,426 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:17:57,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1577880605] [2023-12-02 13:17:57,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1577880605] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:17:57,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:17:57,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 13:17:57,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023363992] [2023-12-02 13:17:57,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:17:57,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 13:17:57,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:17:57,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 13:17:57,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 13:17:57,462 INFO L87 Difference]: Start difference. First operand has 84 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 71 states have internal predecessors, (75), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:17:57,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:17:57,811 INFO L93 Difference]: Finished difference Result 162 states and 202 transitions. [2023-12-02 13:17:57,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 13:17:57,814 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-12-02 13:17:57,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:17:57,821 INFO L225 Difference]: With dead ends: 162 [2023-12-02 13:17:57,822 INFO L226 Difference]: Without dead ends: 75 [2023-12-02 13:17:57,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 13:17:57,829 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:17:57,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 88 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:17:57,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-12-02 13:17:57,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-12-02 13:17:57,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 43 states have (on average 1.5116279069767442) internal successors, (65), 64 states have internal predecessors, (65), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 13:17:57,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2023-12-02 13:17:57,873 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 83 transitions. Word has length 10 [2023-12-02 13:17:57,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:17:57,873 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 83 transitions. [2023-12-02 13:17:57,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:17:57,874 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 83 transitions. [2023-12-02 13:17:57,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 13:17:57,875 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:17:57,876 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:17:57,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-12-02 13:17:58,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:17:58,078 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting func_to_recursive_line_30_to_37_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_40_to_50_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_40_to_50_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-12-02 13:17:58,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:17:58,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1766042597, now seen corresponding path program 1 times [2023-12-02 13:17:58,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:17:58,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [251820378] [2023-12-02 13:17:58,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:17:58,080 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:17:58,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:17:58,082 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:17:58,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-12-02 13:17:58,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:17:58,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 13:17:58,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:18:02,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:18:03,747 INFO L224 Elim1Store]: Index analysis took 1169 ms [2023-12-02 13:18:36,753 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:18:36,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [251820378] [2023-12-02 13:18:36,754 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: line 3541 column 7: canceled [2023-12-02 13:18:36,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [898893931] [2023-12-02 13:18:36,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:18:36,754 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 13:18:36,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 13:18:36,774 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 13:18:36,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e5ded06-78cc-488c-8f24-00c81e247af6/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process