./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_1+newton_3_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_79bd974e-e32f-42bf-8c7d-a6c1d378c268/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79bd974e-e32f-42bf-8c7d-a6c1d378c268/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79bd974e-e32f-42bf-8c7d-a6c1d378c268/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79bd974e-e32f-42bf-8c7d-a6c1d378c268/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_1+newton_3_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79bd974e-e32f-42bf-8c7d-a6c1d378c268/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79bd974e-e32f-42bf-8c7d-a6c1d378c268/bin/utaipan-verify-nQ1chXbOIh --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 bf18a45b9b9a30137533b9517bddb2c27979a6060c07746e0407bf72765a3792 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 15:43:32,401 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 15:43:32,468 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79bd974e-e32f-42bf-8c7d-a6c1d378c268/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 15:43:32,472 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 15:43:32,473 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 15:43:32,498 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 15:43:32,498 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 15:43:32,499 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 15:43:32,500 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 15:43:32,500 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 15:43:32,501 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 15:43:32,501 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 15:43:32,502 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 15:43:32,502 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 15:43:32,503 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 15:43:32,503 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 15:43:32,504 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 15:43:32,504 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 15:43:32,504 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 15:43:32,505 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 15:43:32,506 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 15:43:32,506 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 15:43:32,507 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 15:43:32,507 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 15:43:32,508 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 15:43:32,508 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 15:43:32,509 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 15:43:32,509 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 15:43:32,509 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 15:43:32,510 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 15:43:32,510 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 15:43:32,510 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 15:43:32,511 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 15:43:32,511 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 15:43:32,512 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 15:43:32,512 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 15:43:32,512 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 15:43:32,512 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:43:32,512 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 15:43:32,513 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 15:43:32,513 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 15:43:32,513 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 15:43:32,513 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 15:43:32,514 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 15:43:32,514 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 15:43:32,514 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 15:43:32,514 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 15:43:32,514 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_79bd974e-e32f-42bf-8c7d-a6c1d378c268/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79bd974e-e32f-42bf-8c7d-a6c1d378c268/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf18a45b9b9a30137533b9517bddb2c27979a6060c07746e0407bf72765a3792 [2023-12-02 15:43:32,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 15:43:32,765 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 15:43:32,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 15:43:32,769 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 15:43:32,769 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 15:43:32,770 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79bd974e-e32f-42bf-8c7d-a6c1d378c268/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/combinations/gcd_1+newton_3_3.i [2023-12-02 15:43:35,501 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 15:43:35,666 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 15:43:35,667 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79bd974e-e32f-42bf-8c7d-a6c1d378c268/sv-benchmarks/c/combinations/gcd_1+newton_3_3.i [2023-12-02 15:43:35,673 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79bd974e-e32f-42bf-8c7d-a6c1d378c268/bin/utaipan-verify-nQ1chXbOIh/data/4f84d67a7/e2c87f7d9fc9477d9c09d06b15b453bc/FLAG705837df2 [2023-12-02 15:43:35,683 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79bd974e-e32f-42bf-8c7d-a6c1d378c268/bin/utaipan-verify-nQ1chXbOIh/data/4f84d67a7/e2c87f7d9fc9477d9c09d06b15b453bc [2023-12-02 15:43:35,686 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 15:43:35,687 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 15:43:35,688 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 15:43:35,688 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 15:43:35,693 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 15:43:35,694 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:43:35" (1/1) ... [2023-12-02 15:43:35,695 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c7c337a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:43:35, skipping insertion in model container [2023-12-02 15:43:35,695 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:43:35" (1/1) ... [2023-12-02 15:43:35,716 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 15:43:35,837 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_79bd974e-e32f-42bf-8c7d-a6c1d378c268/sv-benchmarks/c/combinations/gcd_1+newton_3_3.i[1226,1239] [2023-12-02 15:43:35,860 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_79bd974e-e32f-42bf-8c7d-a6c1d378c268/sv-benchmarks/c/combinations/gcd_1+newton_3_3.i[2828,2841] [2023-12-02 15:43:35,861 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:43:35,872 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 15:43:35,882 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_79bd974e-e32f-42bf-8c7d-a6c1d378c268/sv-benchmarks/c/combinations/gcd_1+newton_3_3.i[1226,1239] [2023-12-02 15:43:35,894 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_79bd974e-e32f-42bf-8c7d-a6c1d378c268/sv-benchmarks/c/combinations/gcd_1+newton_3_3.i[2828,2841] [2023-12-02 15:43:35,895 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:43:35,907 INFO L206 MainTranslator]: Completed translation [2023-12-02 15:43:35,907 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:43:35 WrapperNode [2023-12-02 15:43:35,907 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 15:43:35,908 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 15:43:35,908 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 15:43:35,909 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 15:43:35,915 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:43:35" (1/1) ... [2023-12-02 15:43:35,923 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:43:35" (1/1) ... [2023-12-02 15:43:35,940 INFO L138 Inliner]: procedures = 27, calls = 26, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 93 [2023-12-02 15:43:35,941 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 15:43:35,941 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 15:43:35,941 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 15:43:35,941 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 15:43:35,948 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:43:35" (1/1) ... [2023-12-02 15:43:35,948 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:43:35" (1/1) ... [2023-12-02 15:43:35,951 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:43:35" (1/1) ... [2023-12-02 15:43:35,951 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:43:35" (1/1) ... [2023-12-02 15:43:35,956 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:43:35" (1/1) ... [2023-12-02 15:43:35,958 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:43:35" (1/1) ... [2023-12-02 15:43:35,960 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:43:35" (1/1) ... [2023-12-02 15:43:35,961 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:43:35" (1/1) ... [2023-12-02 15:43:35,962 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 15:43:35,963 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 15:43:35,963 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 15:43:35,963 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 15:43:35,964 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:43:35" (1/1) ... [2023-12-02 15:43:35,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:43:35,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79bd974e-e32f-42bf-8c7d-a6c1d378c268/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:43:35,991 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79bd974e-e32f-42bf-8c7d-a6c1d378c268/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 15:43:35,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79bd974e-e32f-42bf-8c7d-a6c1d378c268/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 15:43:36,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 15:43:36,025 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2023-12-02 15:43:36,025 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2023-12-02 15:43:36,025 INFO L130 BoogieDeclarations]: Found specification of procedure f [2023-12-02 15:43:36,026 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2023-12-02 15:43:36,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 15:43:36,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 15:43:36,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 15:43:36,095 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 15:43:36,097 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 15:43:36,255 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 15:43:36,318 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 15:43:36,319 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 15:43:36,320 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:43:36 BoogieIcfgContainer [2023-12-02 15:43:36,321 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 15:43:36,324 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 15:43:36,324 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 15:43:36,327 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 15:43:36,327 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 03:43:35" (1/3) ... [2023-12-02 15:43:36,328 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c54de14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:43:36, skipping insertion in model container [2023-12-02 15:43:36,328 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:43:35" (2/3) ... [2023-12-02 15:43:36,329 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c54de14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:43:36, skipping insertion in model container [2023-12-02 15:43:36,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:43:36" (3/3) ... [2023-12-02 15:43:36,330 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_1+newton_3_3.i [2023-12-02 15:43:36,350 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 15:43:36,350 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-02 15:43:36,391 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 15:43:36,398 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;@68599b74, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 15:43:36,398 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-02 15:43:36,402 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 17 states have (on average 1.411764705882353) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 15:43:36,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 15:43:36,410 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:43:36,411 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 15:43:36,411 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:43:36,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:43:36,417 INFO L85 PathProgramCache]: Analyzing trace with hash -477294563, now seen corresponding path program 1 times [2023-12-02 15:43:36,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:43:36,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158972400] [2023-12-02 15:43:36,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:43:36,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:43:36,511 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:43:36,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [246832373] [2023-12-02 15:43:36,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:43:36,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:43:36,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79bd974e-e32f-42bf-8c7d-a6c1d378c268/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:43:36,517 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79bd974e-e32f-42bf-8c7d-a6c1d378c268/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:43:36,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79bd974e-e32f-42bf-8c7d-a6c1d378c268/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 15:43:36,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:43:36,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 15:43:36,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:43:36,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:43:36,679 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:43:36,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:43:36,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158972400] [2023-12-02 15:43:36,680 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:43:36,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246832373] [2023-12-02 15:43:36,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246832373] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:43:36,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:43:36,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:43:36,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849799972] [2023-12-02 15:43:36,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:43:36,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:43:36,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:43:36,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:43:36,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:43:36,716 INFO L87 Difference]: Start difference. First operand has 28 states, 17 states have (on average 1.411764705882353) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:43:36,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:43:36,762 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2023-12-02 15:43:36,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:43:36,764 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-02 15:43:36,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:43:36,770 INFO L225 Difference]: With dead ends: 37 [2023-12-02 15:43:36,770 INFO L226 Difference]: Without dead ends: 24 [2023-12-02 15:43:36,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:43:36,776 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:43:36,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 15:43:36,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-02 15:43:36,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-12-02 15:43:36,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 15:43:36,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-12-02 15:43:36,806 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 6 [2023-12-02 15:43:36,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:43:36,806 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-12-02 15:43:36,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:43:36,807 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-12-02 15:43:36,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 15:43:36,808 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:43:36,808 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:43:36,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79bd974e-e32f-42bf-8c7d-a6c1d378c268/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 15:43:37,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79bd974e-e32f-42bf-8c7d-a6c1d378c268/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-02 15:43:37,009 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:43:37,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:43:37,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1913486975, now seen corresponding path program 1 times [2023-12-02 15:43:37,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:43:37,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248269477] [2023-12-02 15:43:37,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:43:37,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:43:37,025 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:43:37,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [103245286] [2023-12-02 15:43:37,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:43:37,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:43:37,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79bd974e-e32f-42bf-8c7d-a6c1d378c268/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:43:37,027 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79bd974e-e32f-42bf-8c7d-a6c1d378c268/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:43:37,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79bd974e-e32f-42bf-8c7d-a6c1d378c268/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 15:43:37,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:43:37,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 15:43:37,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:43:37,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:43:37,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:43:37,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:43:37,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:43:37,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248269477] [2023-12-02 15:43:37,229 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:43:37,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103245286] [2023-12-02 15:43:37,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103245286] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:43:37,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [849303107] [2023-12-02 15:43:37,249 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-12-02 15:43:37,249 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:43:37,252 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:43:37,257 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:43:37,257 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:43:38,268 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:43:38,634 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '174#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_gcd_test_#res#1| 128)) (<= |ULTIMATE.start_main1_~x~0#1| 127) (not (= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_main1_~y~0#1|)) (<= 1 |ULTIMATE.start_main1_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ |ULTIMATE.start_main1_~x~0#1| 128)) (<= |ULTIMATE.start_gcd_test_#res#1| 127) (= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= |ULTIMATE.start_main1_~y~0#1| 127))' at error location [2023-12-02 15:43:38,634 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:43:38,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:43:38,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-12-02 15:43:38,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265543686] [2023-12-02 15:43:38,635 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:43:38,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 15:43:38,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:43:38,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 15:43:38,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-12-02 15:43:38,637 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:43:38,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:43:38,700 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2023-12-02 15:43:38,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 15:43:38,701 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 15:43:38,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:43:38,702 INFO L225 Difference]: With dead ends: 28 [2023-12-02 15:43:38,702 INFO L226 Difference]: Without dead ends: 25 [2023-12-02 15:43:38,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-12-02 15:43:38,704 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:43:38,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 134 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:43:38,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-02 15:43:38,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-12-02 15:43:38,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 15:43:38,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-12-02 15:43:38,711 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 7 [2023-12-02 15:43:38,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:43:38,712 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-12-02 15:43:38,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:43:38,712 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-12-02 15:43:38,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 15:43:38,713 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:43:38,713 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-12-02 15:43:38,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79bd974e-e32f-42bf-8c7d-a6c1d378c268/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 15:43:38,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79bd974e-e32f-42bf-8c7d-a6c1d378c268/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:43:38,917 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:43:38,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:43:38,917 INFO L85 PathProgramCache]: Analyzing trace with hash 809188509, now seen corresponding path program 2 times [2023-12-02 15:43:38,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:43:38,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042896882] [2023-12-02 15:43:38,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:43:38,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:43:38,928 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:43:38,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [397464969] [2023-12-02 15:43:38,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:43:38,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:43:38,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79bd974e-e32f-42bf-8c7d-a6c1d378c268/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:43:38,930 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79bd974e-e32f-42bf-8c7d-a6c1d378c268/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:43:38,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79bd974e-e32f-42bf-8c7d-a6c1d378c268/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 15:43:53,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 15:43:53,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:43:53,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-02 15:43:53,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:44:03,797 WARN L854 $PredicateComparison]: unable to prove that (and (let ((.cse0 (<= |c_ULTIMATE.start_gcd_test_~a#1| 127)) (.cse1 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse3 (* |c_ULTIMATE.start_gcd_test_~a#1| 255))) (or (and (= (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0) .cse0 .cse1) (and .cse0 .cse1 (exists ((v_y_1 Int)) (let ((.cse2 (* 256 v_y_1))) (and (<= 0 (+ .cse2 .cse3 128)) (<= (+ .cse2 .cse3 1) 0) (= (mod (+ .cse2 .cse3) |c_ULTIMATE.start_gcd_test_~b#1|) 0))))) (and (<= 0 (+ |c_ULTIMATE.start_gcd_test_~a#1| 128)) (exists ((v_y_3 Int)) (let ((.cse4 (* 256 v_y_3))) (and (<= (+ 65281 .cse3 .cse4) 0) (= (mod (+ 65280 .cse3 .cse4) |c_ULTIMATE.start_gcd_test_~b#1|) 0) (<= 0 (+ 65408 .cse3 .cse4))))) (<= (+ |c_ULTIMATE.start_gcd_test_~a#1| 1) 0)))) (<= |c_ULTIMATE.start_gcd_test_~b#1| 127) (<= 1 |c_ULTIMATE.start_gcd_test_~b#1|)) is different from false [2023-12-02 15:44:43,798 WARN L854 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_31| Int) (v_y_1 Int) (|v_ULTIMATE.start_gcd_test_~a#1_30| Int)) (let ((.cse0 (* 256 v_y_1)) (.cse1 (* 255 |v_ULTIMATE.start_gcd_test_~a#1_30|))) (and (= (mod (+ .cse0 .cse1) |v_ULTIMATE.start_gcd_test_~a#1_31|) 0) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_30| |v_ULTIMATE.start_gcd_test_~a#1_31|) 256)) (<= (+ .cse0 .cse1 1) 0) (<= 0 (+ .cse0 .cse1 128)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_30|) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_31| |c_ULTIMATE.start_gcd_test_~a#1|) 256) |c_ULTIMATE.start_gcd_test_~b#1|) (<= |v_ULTIMATE.start_gcd_test_~a#1_30| 127) (<= 1 |v_ULTIMATE.start_gcd_test_~a#1_31|)))) (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false [2023-12-02 15:45:08,326 WARN L854 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_31| Int) (v_y_1 Int) (|v_ULTIMATE.start_gcd_test_~a#1_30| Int)) (let ((.cse0 (* 256 v_y_1)) (.cse1 (* 255 |v_ULTIMATE.start_gcd_test_~a#1_30|)) (.cse2 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_30| |v_ULTIMATE.start_gcd_test_~a#1_31|) 256))) (and (= (mod (+ .cse0 .cse1) |v_ULTIMATE.start_gcd_test_~a#1_31|) 0) (<= (+ .cse0 .cse1 1) 0) (not (= .cse2 0)) (<= 0 (+ .cse0 .cse1 128)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_30|) (<= |v_ULTIMATE.start_gcd_test_~a#1_30| 127) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_31| .cse2) 256) 0) (<= 1 |v_ULTIMATE.start_gcd_test_~a#1_31|)))) is different from false [2023-12-02 15:45:10,328 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_31| Int) (v_y_1 Int) (|v_ULTIMATE.start_gcd_test_~a#1_30| Int)) (let ((.cse0 (* 256 v_y_1)) (.cse1 (* 255 |v_ULTIMATE.start_gcd_test_~a#1_30|)) (.cse2 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_30| |v_ULTIMATE.start_gcd_test_~a#1_31|) 256))) (and (= (mod (+ .cse0 .cse1) |v_ULTIMATE.start_gcd_test_~a#1_31|) 0) (<= (+ .cse0 .cse1 1) 0) (not (= .cse2 0)) (<= 0 (+ .cse0 .cse1 128)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_30|) (<= |v_ULTIMATE.start_gcd_test_~a#1_30| 127) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_31| .cse2) 256) 0) (<= 1 |v_ULTIMATE.start_gcd_test_~a#1_31|)))) is different from true [2023-12-02 15:45:33,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-12-02 15:45:33,937 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:55:42,073 WARN L293 SmtUtils]: Spent 6.79m on a formula simplification. DAG size of input: 123 DAG size of output: 120 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:56:08,703 WARN L876 $PredicateComparison]: unable to prove that (or (not (= (mod |c_ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_main1_~y~0#1|) 0)) (let ((.cse0 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (and (let ((.cse1 (mod (mod .cse0 |c_ULTIMATE.start_main1_~y~0#1|) 256))) (or (< 127 .cse0) (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| .cse1) 256) 0)) (= .cse1 0))) (let ((.cse2 (mod (+ .cse0 (- 256)) |c_ULTIMATE.start_main1_~y~0#1|))) (or (< .cse0 128) (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| (+ (- 256) (mod (+ .cse2 (* |c_ULTIMATE.start_main1_~y~0#1| 255)) 256))) 256) 0)) (= .cse2 0))))) (< 0 (+ |c_ULTIMATE.start_main1_~x~0#1| 1)) (< |c_ULTIMATE.start_main1_~y~0#1| 1)) is different from true [2023-12-02 15:56:59,166 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_z_10 Int) (|v_ULTIMATE.start_main1_~y~0#1_17| Int) (v_y_10 Int)) (let ((.cse0 (mod (mod v_z_10 |v_ULTIMATE.start_main1_~y~0#1_17|) 256)) (.cse1 (* v_y_10 256)) (.cse2 (* v_z_10 255))) (or (< v_z_10 0) (< 127 v_z_10) (not (= (mod (mod |v_ULTIMATE.start_main1_~y~0#1_17| .cse0) 256) 0)) (= .cse0 0) (< 0 (+ .cse1 .cse2 1)) (not (= (mod (+ .cse1 .cse2) |v_ULTIMATE.start_main1_~y~0#1_17|) 0)) (< (+ .cse1 .cse2 128) 0) (< |v_ULTIMATE.start_main1_~y~0#1_17| 1)))) is different from false [2023-12-02 15:57:01,169 WARN L876 $PredicateComparison]: unable to prove that (forall ((v_z_10 Int) (|v_ULTIMATE.start_main1_~y~0#1_17| Int) (v_y_10 Int)) (let ((.cse0 (mod (mod v_z_10 |v_ULTIMATE.start_main1_~y~0#1_17|) 256)) (.cse1 (* v_y_10 256)) (.cse2 (* v_z_10 255))) (or (< v_z_10 0) (< 127 v_z_10) (not (= (mod (mod |v_ULTIMATE.start_main1_~y~0#1_17| .cse0) 256) 0)) (= .cse0 0) (< 0 (+ .cse1 .cse2 1)) (not (= (mod (+ .cse1 .cse2) |v_ULTIMATE.start_main1_~y~0#1_17|) 0)) (< (+ .cse1 .cse2 128) 0) (< |v_ULTIMATE.start_main1_~y~0#1_17| 1)))) is different from true [2023-12-02 15:57:01,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:57:01,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:57:01,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042896882] [2023-12-02 15:57:01,170 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:57:01,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397464969] [2023-12-02 15:57:01,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397464969] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:57:01,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [200632261] [2023-12-02 15:57:01,173 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-12-02 15:57:01,173 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:57:01,173 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:57:01,173 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:57:01,174 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:57:04,076 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:57:13,152 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '308#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_gcd_test_#res#1| 128)) (<= |ULTIMATE.start_main1_~x~0#1| 127) (not (= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_main1_~y~0#1|)) (<= 1 |ULTIMATE.start_main1_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ |ULTIMATE.start_main1_~x~0#1| 128)) (<= |ULTIMATE.start_gcd_test_#res#1| 127) (= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= |ULTIMATE.start_main1_~y~0#1| 127))' at error location [2023-12-02 15:57:13,152 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:57:13,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:57:13,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-12-02 15:57:13,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171252097] [2023-12-02 15:57:13,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:57:13,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 15:57:13,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:57:13,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 15:57:13,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=107, Unknown=9, NotChecked=120, Total=272 [2023-12-02 15:57:13,155 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:57:15,769 WARN L876 $PredicateComparison]: unable to prove that (and (or (not (= (mod |c_ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_main1_~y~0#1|) 0)) (let ((.cse0 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (and (let ((.cse1 (mod (mod .cse0 |c_ULTIMATE.start_main1_~y~0#1|) 256))) (or (< 127 .cse0) (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| .cse1) 256) 0)) (= .cse1 0))) (let ((.cse2 (mod (+ .cse0 (- 256)) |c_ULTIMATE.start_main1_~y~0#1|))) (or (< .cse0 128) (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| (+ (- 256) (mod (+ .cse2 (* |c_ULTIMATE.start_main1_~y~0#1| 255)) 256))) 256) 0)) (= .cse2 0))))) (< 0 (+ |c_ULTIMATE.start_main1_~x~0#1| 1)) (< |c_ULTIMATE.start_main1_~y~0#1| 1)) (<= |c_ULTIMATE.start_main1_~x~0#1| 127) (<= 0 (+ 128 |c_ULTIMATE.start_main1_~x~0#1|)) (<= |c_ULTIMATE.start_main1_~y~0#1| 127)) is different from true [2023-12-02 15:57:17,778 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse26 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse19 (= .cse26 0)) (.cse29 (+ |c_ULTIMATE.start_gcd_test_~a#1| 1))) (and (or (let ((.cse27 (mod (+ .cse26 |c_ULTIMATE.start_gcd_test_~b#1|) 256)) (.cse28 (mod (+ .cse26 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) (let ((.cse20 (= .cse28 0)) (.cse21 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse28) 256) 0))) (.cse24 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse27) 256) 0))) (.cse25 (= .cse27 0)) (.cse9 (< 0 .cse29))) (let ((.cse10 (< 127 .cse28)) (.cse13 (or .cse24 .cse25 .cse9)) (.cse12 (or .cse20 .cse21 .cse9)) (.cse5 (< .cse27 128)) (.cse1 (< 127 .cse27)) (.cse6 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse8 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse28)) 256) 0))) (.cse0 (< .cse28 128)) (.cse14 (< 0 (+ |c_ULTIMATE.start_gcd_test_~b#1| 1))) (.cse15 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse27)) 256) 0))) (.cse17 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse16 (mod .cse26 256))) (and (or (let ((.cse7 (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse16)) 256) 0)) .cse17))) (let ((.cse4 (or .cse14 (and (or .cse15 .cse9) .cse7))) (.cse3 (or (and .cse7 .cse13) .cse14))) (and (or .cse0 (let ((.cse2 (or .cse6 (and .cse7 (or .cse8 .cse9))))) (and (or .cse1 (and .cse2 .cse3)) (or (and .cse4 .cse2) .cse5)))) (or .cse10 (let ((.cse11 (or (and .cse7 .cse12) .cse6))) (and (or .cse5 (and .cse11 .cse4)) (or (and .cse11 .cse3) .cse1))))))) (< .cse16 128)) (or (< 127 .cse16) (let ((.cse18 (or .cse17 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse16) 256) 0)) (= .cse16 0)))) (let ((.cse22 (or .cse14 (and .cse18 (or .cse19 .cse15 .cse9))))) (and (or .cse10 (and (or .cse1 (and (or (and .cse18 .cse13) .cse14) (or (and .cse18 .cse12) .cse6))) (or (and (or .cse6 (and .cse18 (or .cse19 .cse20 .cse21 .cse9))) .cse22) .cse5))) (or (let ((.cse23 (or .cse6 (and .cse18 (or .cse19 .cse8 .cse9))))) (and (or (and .cse22 .cse23) .cse5) (or (and (or .cse14 (and .cse18 (or .cse24 .cse19 .cse25 .cse9))) .cse23) .cse1))) .cse0))))))))) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (let ((.cse30 (<= |c_ULTIMATE.start_gcd_test_~a#1| 127)) (.cse31 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse33 (* |c_ULTIMATE.start_gcd_test_~a#1| 255))) (or (and .cse19 .cse30 .cse31) (and .cse30 .cse31 (exists ((v_y_1 Int)) (let ((.cse32 (* 256 v_y_1))) (and (<= 0 (+ .cse32 .cse33 128)) (<= (+ .cse32 .cse33 1) 0) (= (mod (+ .cse32 .cse33) |c_ULTIMATE.start_gcd_test_~b#1|) 0))))) (and (<= 0 (+ |c_ULTIMATE.start_gcd_test_~a#1| 128)) (exists ((v_y_3 Int)) (let ((.cse34 (* 256 v_y_3))) (and (<= (+ 65281 .cse33 .cse34) 0) (= (mod (+ 65280 .cse33 .cse34) |c_ULTIMATE.start_gcd_test_~b#1|) 0) (<= 0 (+ 65408 .cse33 .cse34))))) (<= .cse29 0)))) (<= |c_ULTIMATE.start_gcd_test_~b#1| 127) (<= 1 |c_ULTIMATE.start_gcd_test_~b#1|)))) is different from false [2023-12-02 15:57:43,754 WARN L293 SmtUtils]: Spent 22.19s on a formula simplification. DAG size of input: 58 DAG size of output: 55 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:57:45,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Real, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 15:57:47,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:57:49,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:57:51,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:57:53,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:57:55,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:57:57,793 WARN L854 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_31| Int) (v_y_1 Int) (|v_ULTIMATE.start_gcd_test_~a#1_30| Int)) (let ((.cse0 (* 256 v_y_1)) (.cse1 (* 255 |v_ULTIMATE.start_gcd_test_~a#1_30|))) (and (= (mod (+ .cse0 .cse1) |v_ULTIMATE.start_gcd_test_~a#1_31|) 0) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_30| |v_ULTIMATE.start_gcd_test_~a#1_31|) 256)) (<= (+ .cse0 .cse1 1) 0) (<= 0 (+ .cse0 .cse1 128)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_30|) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_31| |c_ULTIMATE.start_gcd_test_~a#1|) 256) |c_ULTIMATE.start_gcd_test_~b#1|) (<= |v_ULTIMATE.start_gcd_test_~a#1_30| 127) (<= 1 |v_ULTIMATE.start_gcd_test_~a#1_31|)))) (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|) (or (not (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (< 127 |c_ULTIMATE.start_gcd_test_~a#1|) (< (+ |c_ULTIMATE.start_gcd_test_~a#1| 128) 0)) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false [2023-12-02 15:57:59,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 15:58:00,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:58:00,287 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2023-12-02 15:58:00,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 15:58:00,288 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-12-02 15:58:00,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:58:00,289 INFO L225 Difference]: With dead ends: 29 [2023-12-02 15:58:00,289 INFO L226 Difference]: Without dead ends: 26 [2023-12-02 15:58:00,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 471.8s TimeCoverageRelationStatistics Valid=46, Invalid=129, Unknown=13, NotChecked=232, Total=420 [2023-12-02 15:58:00,290 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:58:00,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 154 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 6 Unknown, 134 Unchecked, 15.1s Time] [2023-12-02 15:58:00,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-02 15:58:00,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-12-02 15:58:00,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 15:58:00,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-12-02 15:58:00,299 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 8 [2023-12-02 15:58:00,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:58:00,299 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-12-02 15:58:00,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:58:00,299 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-12-02 15:58:00,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 15:58:00,300 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:58:00,300 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2023-12-02 15:58:00,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79bd974e-e32f-42bf-8c7d-a6c1d378c268/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 15:58:00,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79bd974e-e32f-42bf-8c7d-a6c1d378c268/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:58:00,501 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:58:00,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:58:00,502 INFO L85 PathProgramCache]: Analyzing trace with hash -687217407, now seen corresponding path program 3 times [2023-12-02 15:58:00,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:58:00,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75327705] [2023-12-02 15:58:00,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:58:00,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:58:00,520 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:58:00,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1550412311] [2023-12-02 15:58:00,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 15:58:00,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:58:00,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79bd974e-e32f-42bf-8c7d-a6c1d378c268/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:58:00,523 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79bd974e-e32f-42bf-8c7d-a6c1d378c268/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:58:00,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79bd974e-e32f-42bf-8c7d-a6c1d378c268/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 15:58:03,262 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 15:58:03,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:58:03,264 WARN L260 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-02 15:58:03,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:58:05,408 WARN L854 $PredicateComparison]: unable to prove that (and (let ((.cse0 (* |c_ULTIMATE.start_gcd_test_~a#1| 255)) (.cse2 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|))) (or (and (<= 0 (+ |c_ULTIMATE.start_gcd_test_~a#1| 128)) (<= (+ |c_ULTIMATE.start_gcd_test_~a#1| 1) 0) (exists ((v_y_11 Int)) (let ((.cse1 (* v_y_11 256))) (and (<= 0 (+ 65408 .cse0 .cse1)) (= (mod (+ 65280 .cse0 .cse1) |c_ULTIMATE.start_main1_~y~0#1|) 0) (<= (+ 65281 .cse0 .cse1) 0))))) (and .cse2 (= (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_main1_~y~0#1|) 0)) (and (<= |c_ULTIMATE.start_gcd_test_~a#1| 127) (exists ((v_y_13 Int)) (let ((.cse3 (* v_y_13 256))) (and (<= 0 (+ .cse0 128 .cse3)) (<= (+ .cse0 .cse3 1) 0) (= (mod (+ .cse0 .cse3) |c_ULTIMATE.start_main1_~y~0#1|) 0)))) .cse2))) (<= 1 |c_ULTIMATE.start_main1_~y~0#1|) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (= |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~b#1|)) is different from false [2023-12-02 15:58:32,618 WARN L854 $PredicateComparison]: unable to prove that (and (<= 1 |c_ULTIMATE.start_main1_~y~0#1|) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (exists ((v_y_13 Int) (|v_ULTIMATE.start_gcd_test_~a#1_39| Int)) (let ((.cse2 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_39| |c_ULTIMATE.start_main1_~y~0#1|) 256)) (.cse0 (* 255 |v_ULTIMATE.start_gcd_test_~a#1_39|)) (.cse1 (* v_y_13 256))) (and (<= |v_ULTIMATE.start_gcd_test_~a#1_39| 127) (= 0 (mod (+ .cse0 .cse1) |c_ULTIMATE.start_main1_~y~0#1|)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod |c_ULTIMATE.start_main1_~y~0#1| .cse2) 256)) (<= (+ .cse0 .cse1 1) 0) (not (= .cse2 0)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_39|) (= |c_ULTIMATE.start_gcd_test_~a#1| .cse2) (<= 0 (+ .cse0 128 .cse1)))))) is different from false [2023-12-02 15:59:03,537 WARN L854 $PredicateComparison]: unable to prove that (and (exists ((v_y_13 Int) (|v_ULTIMATE.start_gcd_test_~a#1_39| Int)) (let ((.cse0 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_39| |c_ULTIMATE.start_main1_~y~0#1|) 256))) (let ((.cse1 (mod (mod |c_ULTIMATE.start_main1_~y~0#1| .cse0) 256)) (.cse2 (* 255 |v_ULTIMATE.start_gcd_test_~a#1_39|)) (.cse3 (* v_y_13 256))) (and (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse0 .cse1) 256)) (<= |v_ULTIMATE.start_gcd_test_~a#1_39| 127) (= 0 (mod (+ .cse2 .cse3) |c_ULTIMATE.start_main1_~y~0#1|)) (<= (+ .cse2 .cse3 1) 0) (not (= .cse0 0)) (not (= .cse1 0)) (= |c_ULTIMATE.start_gcd_test_~a#1| .cse1) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_39|) (<= 0 (+ .cse2 128 .cse3)))))) (<= 1 |c_ULTIMATE.start_main1_~y~0#1|) (<= |c_ULTIMATE.start_main1_~y~0#1| 127)) is different from false