./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_4+newton_2_4.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_4+newton_2_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 289de09ea2f682a4c4668d6184c2af95807d8c0a5f7625690403c1e8c073d7a9 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:45:41,153 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:45:41,266 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:45:41,276 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:45:41,277 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:45:41,314 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:45:41,314 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:45:41,315 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:45:41,316 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:45:41,320 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:45:41,321 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:45:41,322 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:45:41,322 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:45:41,324 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:45:41,324 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:45:41,325 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:45:41,325 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:45:41,325 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:45:41,326 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:45:41,326 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:45:41,326 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:45:41,327 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:45:41,328 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:45:41,328 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:45:41,329 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:45:41,329 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:45:41,330 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:45:41,330 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:45:41,330 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:45:41,331 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:45:41,332 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:45:41,332 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:45:41,332 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:45:41,332 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:45:41,333 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:45:41,333 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:45:41,333 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:45:41,333 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:45:41,334 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:45:41,334 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:45:41,334 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:45:41,334 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:45:41,334 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:45:41,335 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:45:41,335 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:45:41,335 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_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 289de09ea2f682a4c4668d6184c2af95807d8c0a5f7625690403c1e8c073d7a9 [2023-11-19 04:45:41,667 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:45:41,696 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:45:41,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:45:41,700 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:45:41,701 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:45:41,703 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/combinations/gcd_4+newton_2_4.i [2023-11-19 04:45:44,802 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:45:45,050 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:45:45,051 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/sv-benchmarks/c/combinations/gcd_4+newton_2_4.i [2023-11-19 04:45:45,061 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/data/700bb72de/693c9a04e82446ba8f483b1eaf144735/FLAG03178f8c6 [2023-11-19 04:45:45,077 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/data/700bb72de/693c9a04e82446ba8f483b1eaf144735 [2023-11-19 04:45:45,080 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:45:45,081 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:45:45,083 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:45:45,084 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:45:45,090 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:45:45,091 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:45:45" (1/1) ... [2023-11-19 04:45:45,092 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@492980c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:45:45, skipping insertion in model container [2023-11-19 04:45:45,092 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:45:45" (1/1) ... [2023-11-19 04:45:45,119 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:45:45,302 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/sv-benchmarks/c/combinations/gcd_4+newton_2_4.i[1224,1237] [2023-11-19 04:45:45,333 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/sv-benchmarks/c/combinations/gcd_4+newton_2_4.i[2827,2840] [2023-11-19 04:45:45,335 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:45:45,347 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:45:45,359 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/sv-benchmarks/c/combinations/gcd_4+newton_2_4.i[1224,1237] [2023-11-19 04:45:45,372 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/sv-benchmarks/c/combinations/gcd_4+newton_2_4.i[2827,2840] [2023-11-19 04:45:45,373 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:45:45,388 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:45:45,388 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:45:45 WrapperNode [2023-11-19 04:45:45,389 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:45:45,390 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:45:45,390 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:45:45,390 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:45:45,396 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:45:45" (1/1) ... [2023-11-19 04:45:45,403 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:45:45" (1/1) ... [2023-11-19 04:45:45,427 INFO L138 Inliner]: procedures = 27, calls = 26, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 81 [2023-11-19 04:45:45,428 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:45:45,429 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:45:45,429 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:45:45,429 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:45:45,439 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:45:45" (1/1) ... [2023-11-19 04:45:45,440 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:45:45" (1/1) ... [2023-11-19 04:45:45,442 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:45:45" (1/1) ... [2023-11-19 04:45:45,443 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:45:45" (1/1) ... [2023-11-19 04:45:45,449 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:45:45" (1/1) ... [2023-11-19 04:45:45,453 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:45:45" (1/1) ... [2023-11-19 04:45:45,455 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:45:45" (1/1) ... [2023-11-19 04:45:45,456 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:45:45" (1/1) ... [2023-11-19 04:45:45,459 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:45:45,460 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:45:45,460 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:45:45,460 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:45:45,461 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:45:45" (1/1) ... [2023-11-19 04:45:45,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:45:45,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:45:45,497 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:45:45,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:45:45,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:45:45,542 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2023-11-19 04:45:45,542 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2023-11-19 04:45:45,543 INFO L130 BoogieDeclarations]: Found specification of procedure f [2023-11-19 04:45:45,543 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2023-11-19 04:45:45,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:45:45,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:45:45,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:45:45,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-19 04:45:45,545 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-19 04:45:45,614 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:45:45,616 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:45:45,797 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:45:45,862 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:45:45,862 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 04:45:45,867 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:45:45 BoogieIcfgContainer [2023-11-19 04:45:45,867 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:45:45,870 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:45:45,870 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:45:45,873 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:45:45,873 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:45:45" (1/3) ... [2023-11-19 04:45:45,874 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b1e915f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:45:45, skipping insertion in model container [2023-11-19 04:45:45,874 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:45:45" (2/3) ... [2023-11-19 04:45:45,875 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b1e915f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:45:45, skipping insertion in model container [2023-11-19 04:45:45,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:45:45" (3/3) ... [2023-11-19 04:45:45,876 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_2_4.i [2023-11-19 04:45:45,900 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:45:45,900 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 04:45:45,945 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:45:45,951 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;@619aff4b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:45:45,951 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-19 04:45:45,955 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 20 states have internal predecessors, (25), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-19 04:45:45,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-19 04:45:45,962 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:45:45,962 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:45:45,963 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:45:45,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:45:45,968 INFO L85 PathProgramCache]: Analyzing trace with hash -973186986, now seen corresponding path program 1 times [2023-11-19 04:45:45,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:45:45,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164853843] [2023-11-19 04:45:45,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:45:45,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:45:46,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:45:46,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:45:46,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164853843] [2023-11-19 04:45:46,245 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 04:45:46,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481418809] [2023-11-19 04:45:46,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:45:46,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:45:46,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:45:46,252 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:45:46,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:45:46,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:45:46,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:45:46,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:45:46,489 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 04:45:46,490 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:45:46,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481418809] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:45:46,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:45:46,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:45:46,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050578366] [2023-11-19 04:45:46,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:45:46,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:45:46,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:45:46,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:45:46,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:45:46,535 INFO L87 Difference]: Start difference. First operand has 31 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 20 states have internal predecessors, (25), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:45:46,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:45:46,616 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2023-11-19 04:45:46,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:45:46,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-19 04:45:46,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:45:46,627 INFO L225 Difference]: With dead ends: 47 [2023-11-19 04:45:46,628 INFO L226 Difference]: Without dead ends: 29 [2023-11-19 04:45:46,631 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 04:45:46,638 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:45:46,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 49 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:45:46,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-19 04:45:46,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2023-11-19 04:45:46,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-19 04:45:46,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2023-11-19 04:45:46,681 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 8 [2023-11-19 04:45:46,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:45:46,682 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2023-11-19 04:45:46,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:45:46,682 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2023-11-19 04:45:46,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-19 04:45:46,684 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:45:46,684 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:45:46,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 04:45:46,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:45:46,886 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:45:46,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:45:46,886 INFO L85 PathProgramCache]: Analyzing trace with hash -407210184, now seen corresponding path program 1 times [2023-11-19 04:45:46,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:45:46,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806777653] [2023-11-19 04:45:46,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:45:46,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:45:46,924 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:45:46,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1403964472] [2023-11-19 04:45:46,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:45:46,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:45:46,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:45:46,938 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:45:46,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:45:47,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:45:47,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:45:47,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:45:47,071 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 04:45:47,072 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:45:47,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:45:47,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806777653] [2023-11-19 04:45:47,073 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:45:47,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403964472] [2023-11-19 04:45:47,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403964472] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:45:47,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:45:47,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:45:47,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609728038] [2023-11-19 04:45:47,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:45:47,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:45:47,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:45:47,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:45:47,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:45:47,081 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:45:47,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:45:47,125 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2023-11-19 04:45:47,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:45:47,127 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-19 04:45:47,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:45:47,129 INFO L225 Difference]: With dead ends: 38 [2023-11-19 04:45:47,129 INFO L226 Difference]: Without dead ends: 28 [2023-11-19 04:45:47,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 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 04:45:47,132 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:45:47,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:45:47,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-19 04:45:47,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-11-19 04:45:47,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-19 04:45:47,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-11-19 04:45:47,141 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 9 [2023-11-19 04:45:47,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:45:47,141 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-11-19 04:45:47,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:45:47,142 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-11-19 04:45:47,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 04:45:47,142 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:45:47,143 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:45:47,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:45:47,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:45:47,344 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:45:47,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:45:47,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1214404405, now seen corresponding path program 1 times [2023-11-19 04:45:47,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:45:47,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927816132] [2023-11-19 04:45:47,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:45:47,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:45:47,371 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:45:47,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [629370159] [2023-11-19 04:45:47,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:45:47,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:45:47,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:45:47,378 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:45:47,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:45:47,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:45:47,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 04:45:47,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:45:47,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:45:47,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:45:47,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:45:47,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:45:47,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927816132] [2023-11-19 04:45:47,554 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:45:47,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629370159] [2023-11-19 04:45:47,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629370159] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:45:47,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [462686473] [2023-11-19 04:45:47,578 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-19 04:45:47,578 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:45:47,582 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:45:47,588 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:45:47,589 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:45:48,225 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 48 for LOIs [2023-11-19 04:45:48,313 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:45:48,932 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '340#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_gcd_test_#res#1_BEFORE_CALL_1| Int)) (and (<= 0 (+ |v_ULTIMATE.start_gcd_test_#res#1_BEFORE_CALL_1| 2147483648)) (not (= (mod 63 |v_ULTIMATE.start_gcd_test_#res#1_BEFORE_CALL_1|) 0)) (<= |v_ULTIMATE.start_gcd_test_#res#1_BEFORE_CALL_1| 2147483647))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-19 04:45:48,932 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:45:48,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:45:48,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-11-19 04:45:48,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186800333] [2023-11-19 04:45:48,933 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 04:45:48,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:45:48,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:45:48,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:45:48,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-11-19 04:45:48,936 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:45:49,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:45:49,001 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2023-11-19 04:45:49,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:45:49,002 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-19 04:45:49,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:45:49,004 INFO L225 Difference]: With dead ends: 40 [2023-11-19 04:45:49,004 INFO L226 Difference]: Without dead ends: 30 [2023-11-19 04:45:49,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-11-19 04:45:49,009 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:45:49,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:45:49,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-19 04:45:49,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-11-19 04:45:49,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-19 04:45:49,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2023-11-19 04:45:49,024 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 10 [2023-11-19 04:45:49,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:45:49,024 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2023-11-19 04:45:49,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:45:49,025 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2023-11-19 04:45:49,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 04:45:49,025 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:45:49,026 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:45:49,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:45:49,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:45:49,226 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:45:49,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:45:49,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1207812715, now seen corresponding path program 2 times [2023-11-19 04:45:49,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:45:49,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079240974] [2023-11-19 04:45:49,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:45:49,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:45:49,264 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:45:49,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1082281044] [2023-11-19 04:45:49,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 04:45:49,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:45:49,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:45:49,269 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:45:49,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:45:49,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 04:45:49,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:45:49,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 04:45:49,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:45:49,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:45:49,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:45:49,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:45:49,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:45:49,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079240974] [2023-11-19 04:45:49,683 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:45:49,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082281044] [2023-11-19 04:45:49,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082281044] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:45:49,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1156975329] [2023-11-19 04:45:49,686 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-19 04:45:49,686 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:45:49,687 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:45:49,687 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:45:49,687 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:45:49,990 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2023-11-19 04:45:50,027 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:45:50,668 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '528#(and (exists ((|v_ULTIMATE.start_main1_~g~0#1_BEFORE_CALL_2| Int)) (and (<= |v_ULTIMATE.start_main1_~g~0#1_BEFORE_CALL_2| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main1_~g~0#1_BEFORE_CALL_2| 2147483648)) (not (= (mod 63 |v_ULTIMATE.start_main1_~g~0#1_BEFORE_CALL_2|) 0)))) (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-19 04:45:50,668 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:45:50,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:45:50,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-19 04:45:50,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679751369] [2023-11-19 04:45:50,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 04:45:50,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 04:45:50,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:45:50,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 04:45:50,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-11-19 04:45:50,670 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:45:50,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:45:50,799 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2023-11-19 04:45:50,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:45:50,800 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-19 04:45:50,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:45:50,801 INFO L225 Difference]: With dead ends: 41 [2023-11-19 04:45:50,801 INFO L226 Difference]: Without dead ends: 31 [2023-11-19 04:45:50,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2023-11-19 04:45:50,803 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:45:50,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 155 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:45:50,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-19 04:45:50,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-11-19 04:45:50,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-19 04:45:50,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-11-19 04:45:50,817 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 12 [2023-11-19 04:45:50,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:45:50,817 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-11-19 04:45:50,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:45:50,817 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-11-19 04:45:50,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-19 04:45:50,818 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:45:50,818 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:45:50,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 04:45:51,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:45:51,032 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:45:51,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:45:51,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1606665208, now seen corresponding path program 3 times [2023-11-19 04:45:51,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:45:51,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402214674] [2023-11-19 04:45:51,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:45:51,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:45:51,048 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:45:51,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [204913919] [2023-11-19 04:45:51,049 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 04:45:51,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:45:51,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:45:51,050 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:45:51,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 04:45:51,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 04:45:51,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:45:51,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 04:45:51,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:45:51,181 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:45:51,181 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:45:51,689 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:45:51,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:45:51,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402214674] [2023-11-19 04:45:51,690 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:45:51,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204913919] [2023-11-19 04:45:51,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204913919] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:45:51,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [149675513] [2023-11-19 04:45:51,694 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-19 04:45:51,694 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:45:51,695 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:45:51,695 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:45:51,695 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:45:51,986 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2023-11-19 04:45:52,018 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:45:52,548 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '728#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_gcd_test_#res#1_BEFORE_CALL_3| Int)) (and (<= |v_ULTIMATE.start_gcd_test_#res#1_BEFORE_CALL_3| 2147483647) (<= 0 (+ |v_ULTIMATE.start_gcd_test_#res#1_BEFORE_CALL_3| 2147483648)) (not (= (mod 63 |v_ULTIMATE.start_gcd_test_#res#1_BEFORE_CALL_3|) 0)))))' at error location [2023-11-19 04:45:52,548 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:45:52,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:45:52,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-19 04:45:52,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669330306] [2023-11-19 04:45:52,549 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 04:45:52,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 04:45:52,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:45:52,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 04:45:52,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-11-19 04:45:52,551 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:45:52,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:45:52,943 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2023-11-19 04:45:52,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 04:45:52,944 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-19 04:45:52,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:45:52,945 INFO L225 Difference]: With dead ends: 46 [2023-11-19 04:45:52,945 INFO L226 Difference]: Without dead ends: 36 [2023-11-19 04:45:52,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2023-11-19 04:45:52,946 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 3 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:45:52,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 133 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:45:52,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-19 04:45:52,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-11-19 04:45:52,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-19 04:45:52,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2023-11-19 04:45:52,954 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 13 [2023-11-19 04:45:52,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:45:52,955 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2023-11-19 04:45:52,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:45:52,955 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2023-11-19 04:45:52,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-19 04:45:52,956 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:45:52,956 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:45:52,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 04:45:53,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:45:53,167 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:45:53,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:45:53,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1086190603, now seen corresponding path program 4 times [2023-11-19 04:45:53,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:45:53,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287007682] [2023-11-19 04:45:53,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:45:53,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:45:53,186 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:45:53,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [109270605] [2023-11-19 04:45:53,190 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 04:45:53,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:45:53,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:45:53,192 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:45:53,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 04:45:53,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:45:53,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-19 04:45:53,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:45:53,398 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:45:53,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:46:14,632 WARN L293 SmtUtils]: Spent 12.19s on a formula simplification. DAG size of input: 148 DAG size of output: 148 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-19 04:46:21,617 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:46:21,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:46:21,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287007682] [2023-11-19 04:46:21,618 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:46:21,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109270605] [2023-11-19 04:46:21,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109270605] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:46:21,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [830743231] [2023-11-19 04:46:21,621 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-19 04:46:21,621 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:46:21,621 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:46:21,622 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:46:21,622 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:46:21,863 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2023-11-19 04:46:21,890 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:46:22,688 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '972#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main1_~g~0#1_BEFORE_CALL_5| Int)) (and (<= 0 (+ |v_ULTIMATE.start_main1_~g~0#1_BEFORE_CALL_5| 2147483648)) (<= |v_ULTIMATE.start_main1_~g~0#1_BEFORE_CALL_5| 2147483647) (not (= (mod 63 |v_ULTIMATE.start_main1_~g~0#1_BEFORE_CALL_5|) 0)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-19 04:46:22,688 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:46:22,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:46:22,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2023-11-19 04:46:22,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914044645] [2023-11-19 04:46:22,689 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 04:46:22,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 04:46:22,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:46:22,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 04:46:22,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2023-11-19 04:46:22,691 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 22 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:46:23,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:46:23,140 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2023-11-19 04:46:23,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 04:46:23,141 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-19 04:46:23,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:46:23,141 INFO L225 Difference]: With dead ends: 50 [2023-11-19 04:46:23,142 INFO L226 Difference]: Without dead ends: 33 [2023-11-19 04:46:23,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2023-11-19 04:46:23,143 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:46:23,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 216 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:46:23,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-19 04:46:23,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-11-19 04:46:23,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-19 04:46:23,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2023-11-19 04:46:23,150 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 14 [2023-11-19 04:46:23,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:46:23,156 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2023-11-19 04:46:23,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:46:23,156 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2023-11-19 04:46:23,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 04:46:23,158 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:46:23,158 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:46:23,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 04:46:23,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:46:23,372 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:46:23,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:46:23,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1094258415, now seen corresponding path program 1 times [2023-11-19 04:46:23,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:46:23,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475650744] [2023-11-19 04:46:23,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:46:23,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:46:23,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 04:46:23,386 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 04:46:23,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 04:46:23,423 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-19 04:46:23,424 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 04:46:23,424 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-11-19 04:46:23,426 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-19 04:46:23,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 04:46:23,430 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2023-11-19 04:46:23,434 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-19 04:46:23,446 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret7 could not be translated [2023-11-19 04:46:23,447 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret8 could not be translated [2023-11-19 04:46:23,447 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret7 could not be translated [2023-11-19 04:46:23,447 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret9 could not be translated [2023-11-19 04:46:23,448 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret10 could not be translated [2023-11-19 04:46:23,448 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret9 could not be translated [2023-11-19 04:46:23,454 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 04:46:23 BoogieIcfgContainer [2023-11-19 04:46:23,454 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-19 04:46:23,454 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-19 04:46:23,454 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-19 04:46:23,455 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-19 04:46:23,455 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:45:45" (3/4) ... [2023-11-19 04:46:23,457 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-19 04:46:23,458 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-19 04:46:23,458 INFO L158 Benchmark]: Toolchain (without parser) took 38376.94ms. Allocated memory was 140.5MB in the beginning and 230.7MB in the end (delta: 90.2MB). Free memory was 94.2MB in the beginning and 127.1MB in the end (delta: -32.9MB). Peak memory consumption was 58.8MB. Max. memory is 16.1GB. [2023-11-19 04:46:23,458 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 140.5MB. Free memory is still 113.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 04:46:23,459 INFO L158 Benchmark]: CACSL2BoogieTranslator took 305.58ms. Allocated memory is still 140.5MB. Free memory was 93.7MB in the beginning and 82.0MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-19 04:46:23,459 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.39ms. Allocated memory is still 140.5MB. Free memory was 82.0MB in the beginning and 80.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 04:46:23,459 INFO L158 Benchmark]: Boogie Preprocessor took 30.52ms. Allocated memory is still 140.5MB. Free memory was 80.0MB in the beginning and 79.0MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 04:46:23,460 INFO L158 Benchmark]: RCFGBuilder took 407.16ms. Allocated memory is still 140.5MB. Free memory was 79.0MB in the beginning and 62.8MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-19 04:46:23,460 INFO L158 Benchmark]: TraceAbstraction took 37584.20ms. Allocated memory was 140.5MB in the beginning and 230.7MB in the end (delta: 90.2MB). Free memory was 62.2MB in the beginning and 127.1MB in the end (delta: -64.9MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2023-11-19 04:46:23,460 INFO L158 Benchmark]: Witness Printer took 3.44ms. Allocated memory is still 230.7MB. Free memory is still 127.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 04:46:23,462 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 140.5MB. Free memory is still 113.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 305.58ms. Allocated memory is still 140.5MB. Free memory was 93.7MB in the beginning and 82.0MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.39ms. Allocated memory is still 140.5MB. Free memory was 82.0MB in the beginning and 80.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.52ms. Allocated memory is still 140.5MB. Free memory was 80.0MB in the beginning and 79.0MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 407.16ms. Allocated memory is still 140.5MB. Free memory was 79.0MB in the beginning and 62.8MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 37584.20ms. Allocated memory was 140.5MB in the beginning and 230.7MB in the end (delta: 90.2MB). Free memory was 62.2MB in the beginning and 127.1MB in the end (delta: -64.9MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Witness Printer took 3.44ms. Allocated memory is still 230.7MB. Free memory is still 127.1MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret7 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret8 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret7 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret9 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret10 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret9 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 109]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 98, overapproximation of someBinaryDOUBLEComparisonOperation at line 108, overapproximation of someBinaryArithmeticFLOAToperation at line 102. Possible FailurePath: [L115] COND FALSE !(__VERIFIER_nondet_int()) [L118] CALL main2() [L97] float IN = __VERIFIER_nondet_float(); [L98] CALL assume_abort_if_not(IN > -0.8f && IN < 0.8f) [L82] COND FALSE !(!cond) [L98] RET assume_abort_if_not(IN > -0.8f && IN < 0.8f) [L100] CALL, EXPR f(IN) VAL [\old(x)=111] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; [L100] RET, EXPR f(IN) VAL [IN=111] [L100] CALL, EXPR fp(IN) VAL [\old(x)=111] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; [L100] RET, EXPR fp(IN) VAL [IN=111] [L100] float x = IN - f(IN)/fp(IN); [L102] CALL, EXPR f(x) VAL [\old(x)=112] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; [L102] RET, EXPR f(x) VAL [IN=111, x=112] [L102] CALL, EXPR fp(x) VAL [\old(x)=112] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; [L102] RET, EXPR fp(x) VAL [IN=111, x=112] [L102] x = x - f(x)/fp(x) [L108] COND TRUE !(x < 0.1) VAL [IN=111] [L109] reach_error() VAL [IN=111] - UnprovableResult [Line: 27]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 37.5s, OverallIterations: 7, TraceHistogramMax: 5, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 25 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 25 mSDsluCounter, 666 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 529 mSDsCounter, 21 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 357 IncrementalHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 21 mSolverCounterUnsat, 137 mSDtfsCounter, 357 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 164 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 21.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=5, InterpolantAutomatonStates: 44, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 29.6s InterpolantComputationTime, 92 NumberOfCodeBlocks, 92 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 105 ConstructedInterpolants, 0 QuantifiedInterpolants, 1831 SizeOfPredicates, 26 NumberOfNonLiveVariables, 433 ConjunctsInSsa, 79 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 0/64 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-11-19 04:46:23,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, 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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_4+newton_2_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 289de09ea2f682a4c4668d6184c2af95807d8c0a5f7625690403c1e8c073d7a9 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:46:26,349 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:46:26,493 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2023-11-19 04:46:26,502 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:46:26,503 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:46:26,555 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:46:26,556 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:46:26,556 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:46:26,557 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:46:26,563 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:46:26,564 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:46:26,564 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:46:26,565 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:46:26,566 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:46:26,567 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:46:26,567 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:46:26,569 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:46:26,569 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:46:26,570 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:46:26,571 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:46:26,571 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:46:26,572 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:46:26,573 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:46:26,573 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:46:26,573 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 04:46:26,574 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-19 04:46:26,574 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-19 04:46:26,575 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:46:26,575 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:46:26,576 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:46:26,577 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:46:26,578 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 04:46:26,578 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:46:26,579 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:46:26,579 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:46:26,579 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:46:26,580 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:46:26,580 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-19 04:46:26,580 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-19 04:46:26,581 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:46:26,582 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:46:26,582 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:46:26,582 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_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 289de09ea2f682a4c4668d6184c2af95807d8c0a5f7625690403c1e8c073d7a9 [2023-11-19 04:46:27,073 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:46:27,110 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:46:27,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:46:27,115 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:46:27,116 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:46:27,118 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/combinations/gcd_4+newton_2_4.i [2023-11-19 04:46:30,280 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:46:30,571 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:46:30,573 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/sv-benchmarks/c/combinations/gcd_4+newton_2_4.i [2023-11-19 04:46:30,585 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/data/8d670a377/d85f3229e6dc4c7d89b9998be7b0aa55/FLAGf768d5741 [2023-11-19 04:46:30,607 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/data/8d670a377/d85f3229e6dc4c7d89b9998be7b0aa55 [2023-11-19 04:46:30,614 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:46:30,616 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:46:30,620 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:46:30,620 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:46:30,626 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:46:30,627 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:46:30" (1/1) ... [2023-11-19 04:46:30,628 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a96acf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:30, skipping insertion in model container [2023-11-19 04:46:30,628 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:46:30" (1/1) ... [2023-11-19 04:46:30,665 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:46:30,899 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/sv-benchmarks/c/combinations/gcd_4+newton_2_4.i[1224,1237] [2023-11-19 04:46:30,957 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/sv-benchmarks/c/combinations/gcd_4+newton_2_4.i[2827,2840] [2023-11-19 04:46:30,964 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:46:30,986 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:46:31,011 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/sv-benchmarks/c/combinations/gcd_4+newton_2_4.i[1224,1237] [2023-11-19 04:46:31,045 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/sv-benchmarks/c/combinations/gcd_4+newton_2_4.i[2827,2840] [2023-11-19 04:46:31,048 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:46:31,069 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:46:31,070 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:31 WrapperNode [2023-11-19 04:46:31,070 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:46:31,072 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:46:31,072 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:46:31,072 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:46:31,081 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:31" (1/1) ... [2023-11-19 04:46:31,108 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:31" (1/1) ... [2023-11-19 04:46:31,148 INFO L138 Inliner]: procedures = 28, calls = 26, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 78 [2023-11-19 04:46:31,149 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:46:31,150 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:46:31,150 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:46:31,150 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:46:31,161 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:31" (1/1) ... [2023-11-19 04:46:31,161 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:31" (1/1) ... [2023-11-19 04:46:31,166 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:31" (1/1) ... [2023-11-19 04:46:31,166 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:31" (1/1) ... [2023-11-19 04:46:31,176 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:31" (1/1) ... [2023-11-19 04:46:31,180 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:31" (1/1) ... [2023-11-19 04:46:31,182 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:31" (1/1) ... [2023-11-19 04:46:31,184 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:31" (1/1) ... [2023-11-19 04:46:31,188 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:46:31,189 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:46:31,190 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:46:31,190 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:46:31,191 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:31" (1/1) ... [2023-11-19 04:46:31,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:46:31,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:46:31,237 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:46:31,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:46:31,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:46:31,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-19 04:46:31,279 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2023-11-19 04:46:31,279 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2023-11-19 04:46:31,279 INFO L130 BoogieDeclarations]: Found specification of procedure f [2023-11-19 04:46:31,280 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2023-11-19 04:46:31,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:46:31,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:46:31,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-19 04:46:31,283 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-19 04:46:31,370 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:46:31,373 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:46:38,288 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:46:38,298 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:46:38,298 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 04:46:38,302 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:46:38 BoogieIcfgContainer [2023-11-19 04:46:38,302 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:46:38,305 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:46:38,305 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:46:38,308 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:46:38,309 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:46:30" (1/3) ... [2023-11-19 04:46:38,309 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a9b0519 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:46:38, skipping insertion in model container [2023-11-19 04:46:38,310 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:31" (2/3) ... [2023-11-19 04:46:38,310 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a9b0519 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:46:38, skipping insertion in model container [2023-11-19 04:46:38,310 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:46:38" (3/3) ... [2023-11-19 04:46:38,312 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_2_4.i [2023-11-19 04:46:38,333 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:46:38,333 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 04:46:38,391 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:46:38,399 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;@2dc7218b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:46:38,399 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-19 04:46:38,405 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 30 states have (on average 1.4) internal successors, (42), 32 states have internal predecessors, (42), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-19 04:46:38,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 04:46:38,414 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:46:38,416 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:46:38,416 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:46:38,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:46:38,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1780479560, now seen corresponding path program 1 times [2023-11-19 04:46:38,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 04:46:38,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [793419163] [2023-11-19 04:46:38,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:46:38,439 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 [2023-11-19 04:46:38,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 04:46:38,442 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/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) [2023-11-19 04:46:38,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/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 [2023-11-19 04:46:38,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:46:38,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:46:38,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:46:38,728 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 04:46:38,728 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:46:38,729 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 04:46:38,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [793419163] [2023-11-19 04:46:38,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [793419163] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:46:38,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:46:38,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:46:38,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716612134] [2023-11-19 04:46:38,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:46:38,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:46:38,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 04:46:38,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:46:38,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:46:38,772 INFO L87 Difference]: Start difference. First operand has 43 states, 30 states have (on average 1.4) internal successors, (42), 32 states have internal predecessors, (42), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:46:38,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:46:38,895 INFO L93 Difference]: Finished difference Result 85 states and 114 transitions. [2023-11-19 04:46:38,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:46:38,898 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-19 04:46:38,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:46:38,907 INFO L225 Difference]: With dead ends: 85 [2023-11-19 04:46:38,907 INFO L226 Difference]: Without dead ends: 40 [2023-11-19 04:46:38,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 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 04:46:38,915 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:46:38,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 86 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:46:38,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-19 04:46:38,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2023-11-19 04:46:38,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-19 04:46:38,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2023-11-19 04:46:38,960 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 11 [2023-11-19 04:46:38,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:46:38,960 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2023-11-19 04:46:38,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:46:38,961 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2023-11-19 04:46:38,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-19 04:46:38,962 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:46:38,962 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:46:38,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/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 [2023-11-19 04:46:39,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/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 [2023-11-19 04:46:39,197 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:46:39,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:46:39,198 INFO L85 PathProgramCache]: Analyzing trace with hash 413626440, now seen corresponding path program 1 times [2023-11-19 04:46:39,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 04:46:39,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1531546806] [2023-11-19 04:46:39,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:46:39,200 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 [2023-11-19 04:46:39,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 04:46:39,202 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/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) [2023-11-19 04:46:39,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/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 [2023-11-19 04:46:39,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:46:39,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:46:39,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:46:39,426 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 04:46:39,427 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:46:39,427 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 04:46:39,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1531546806] [2023-11-19 04:46:39,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1531546806] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:46:39,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:46:39,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:46:39,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48640110] [2023-11-19 04:46:39,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:46:39,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:46:39,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 04:46:39,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:46:39,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:46:39,431 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:46:39,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:46:39,532 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2023-11-19 04:46:39,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:46:39,533 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-19 04:46:39,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:46:39,534 INFO L225 Difference]: With dead ends: 52 [2023-11-19 04:46:39,535 INFO L226 Difference]: Without dead ends: 38 [2023-11-19 04:46:39,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 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 04:46:39,537 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:46:39,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 69 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:46:39,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-19 04:46:39,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-11-19 04:46:39,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-19 04:46:39,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2023-11-19 04:46:39,553 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 13 [2023-11-19 04:46:39,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:46:39,555 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2023-11-19 04:46:39,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:46:39,556 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2023-11-19 04:46:39,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 04:46:39,557 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:46:39,558 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:46:39,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/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)] Forceful destruction successful, exit code 0 [2023-11-19 04:46:39,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/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 [2023-11-19 04:46:39,763 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:46:39,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:46:39,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1715037691, now seen corresponding path program 1 times [2023-11-19 04:46:39,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 04:46:39,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [617876457] [2023-11-19 04:46:39,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:46:39,765 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 [2023-11-19 04:46:39,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 04:46:39,767 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/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) [2023-11-19 04:46:39,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/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 (4)] Waiting until timeout for monitored process [2023-11-19 04:46:39,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:46:39,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 04:46:39,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:46:40,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:46:40,128 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:46:40,129 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 04:46:40,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [617876457] [2023-11-19 04:46:40,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [617876457] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:46:40,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:46:40,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:46:40,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848752155] [2023-11-19 04:46:40,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:46:40,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:46:40,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 04:46:40,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:46:40,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:46:40,132 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:46:40,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:46:40,240 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2023-11-19 04:46:40,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:46:40,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-19 04:46:40,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:46:40,243 INFO L225 Difference]: With dead ends: 53 [2023-11-19 04:46:40,243 INFO L226 Difference]: Without dead ends: 40 [2023-11-19 04:46:40,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 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 04:46:40,246 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:46:40,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:46:40,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-19 04:46:40,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-11-19 04:46:40,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 30 states have internal predecessors, (33), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-19 04:46:40,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2023-11-19 04:46:40,256 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 15 [2023-11-19 04:46:40,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:46:40,256 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2023-11-19 04:46:40,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:46:40,261 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2023-11-19 04:46:40,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 04:46:40,262 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:46:40,262 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:46:40,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/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 (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:46:40,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/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 [2023-11-19 04:46:40,463 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:46:40,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:46:40,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1030095042, now seen corresponding path program 1 times [2023-11-19 04:46:40,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 04:46:40,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685223694] [2023-11-19 04:46:40,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:46:40,465 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 [2023-11-19 04:46:40,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 04:46:40,466 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/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) [2023-11-19 04:46:40,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/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 (5)] Waiting until timeout for monitored process [2023-11-19 04:46:40,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:46:40,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 04:46:40,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:46:40,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:46:40,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:46:41,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:46:41,252 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 04:46:41,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [685223694] [2023-11-19 04:46:41,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [685223694] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:46:41,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [216125790] [2023-11-19 04:46:41,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:46:41,253 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-19 04:46:41,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/cvc4 [2023-11-19 04:46:41,260 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-19 04:46:41,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2023-11-19 04:46:41,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:46:41,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 04:46:41,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:46:41,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:46:41,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:46:41,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:46:41,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [216125790] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:46:41,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858412351] [2023-11-19 04:46:41,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:46:41,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:46:41,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:46:41,843 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:46:41,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_129b14c3-5d37-4262-98a4-0b8b95dc2d71/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 04:46:41,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:46:41,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 04:46:41,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:46:42,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:46:42,328 INFO L327 TraceCheckSpWp]: Computing backward predicates...