./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_1+newton_3_8.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbd6c4f-5819-47cc-a705-91dabe86beb7/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbd6c4f-5819-47cc-a705-91dabe86beb7/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_3dbd6c4f-5819-47cc-a705-91dabe86beb7/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbd6c4f-5819-47cc-a705-91dabe86beb7/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_1+newton_3_8.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbd6c4f-5819-47cc-a705-91dabe86beb7/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_3dbd6c4f-5819-47cc-a705-91dabe86beb7/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 fb60664eb219cfca617a3a97a655d40aa192b004d90693207c446e4cc68b6381 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 15:50:18,903 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 15:50:18,967 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbd6c4f-5819-47cc-a705-91dabe86beb7/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 15:50:18,973 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 15:50:18,973 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 15:50:18,998 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 15:50:18,999 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 15:50:18,999 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 15:50:19,000 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 15:50:19,001 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 15:50:19,001 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 15:50:19,002 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 15:50:19,002 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 15:50:19,003 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 15:50:19,003 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 15:50:19,004 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 15:50:19,004 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 15:50:19,005 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 15:50:19,005 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 15:50:19,005 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 15:50:19,006 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 15:50:19,009 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 15:50:19,010 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 15:50:19,010 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 15:50:19,010 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 15:50:19,011 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 15:50:19,011 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 15:50:19,011 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 15:50:19,012 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 15:50:19,012 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 15:50:19,012 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 15:50:19,013 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 15:50:19,013 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 15:50:19,013 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 15:50:19,013 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 15:50:19,014 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 15:50:19,014 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 15:50:19,014 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:50:19,014 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 15:50:19,014 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 15:50:19,015 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 15:50:19,015 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 15:50:19,015 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 15:50:19,015 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 15:50:19,015 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 15:50:19,016 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 15:50:19,016 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 15:50:19,016 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_3dbd6c4f-5819-47cc-a705-91dabe86beb7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbd6c4f-5819-47cc-a705-91dabe86beb7/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fb60664eb219cfca617a3a97a655d40aa192b004d90693207c446e4cc68b6381 [2023-12-02 15:50:19,241 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 15:50:19,260 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 15:50:19,263 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 15:50:19,264 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 15:50:19,265 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 15:50:19,266 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbd6c4f-5819-47cc-a705-91dabe86beb7/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/combinations/gcd_1+newton_3_8.i [2023-12-02 15:50:21,990 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 15:50:22,170 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 15:50:22,171 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbd6c4f-5819-47cc-a705-91dabe86beb7/sv-benchmarks/c/combinations/gcd_1+newton_3_8.i [2023-12-02 15:50:22,180 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbd6c4f-5819-47cc-a705-91dabe86beb7/bin/utaipan-verify-nQ1chXbOIh/data/acff9aaa5/c1b806717f9d42a9added6e0dfdb4202/FLAGe1f087554 [2023-12-02 15:50:22,193 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbd6c4f-5819-47cc-a705-91dabe86beb7/bin/utaipan-verify-nQ1chXbOIh/data/acff9aaa5/c1b806717f9d42a9added6e0dfdb4202 [2023-12-02 15:50:22,196 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 15:50:22,197 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 15:50:22,198 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 15:50:22,198 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 15:50:22,203 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 15:50:22,204 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:50:22" (1/1) ... [2023-12-02 15:50:22,205 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76a3b3e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:50:22, skipping insertion in model container [2023-12-02 15:50:22,205 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:50:22" (1/1) ... [2023-12-02 15:50:22,231 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 15:50:22,388 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_3dbd6c4f-5819-47cc-a705-91dabe86beb7/sv-benchmarks/c/combinations/gcd_1+newton_3_8.i[1226,1239] [2023-12-02 15:50:22,413 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_3dbd6c4f-5819-47cc-a705-91dabe86beb7/sv-benchmarks/c/combinations/gcd_1+newton_3_8.i[2828,2841] [2023-12-02 15:50:22,415 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:50:22,425 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 15:50:22,439 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_3dbd6c4f-5819-47cc-a705-91dabe86beb7/sv-benchmarks/c/combinations/gcd_1+newton_3_8.i[1226,1239] [2023-12-02 15:50:22,450 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_3dbd6c4f-5819-47cc-a705-91dabe86beb7/sv-benchmarks/c/combinations/gcd_1+newton_3_8.i[2828,2841] [2023-12-02 15:50:22,452 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:50:22,466 INFO L206 MainTranslator]: Completed translation [2023-12-02 15:50:22,466 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:50:22 WrapperNode [2023-12-02 15:50:22,466 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 15:50:22,467 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 15:50:22,467 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 15:50:22,467 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 15:50:22,473 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:50:22" (1/1) ... [2023-12-02 15:50:22,480 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:50:22" (1/1) ... [2023-12-02 15:50:22,503 INFO L138 Inliner]: procedures = 27, calls = 26, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 93 [2023-12-02 15:50:22,503 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 15:50:22,504 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 15:50:22,504 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 15:50:22,504 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 15:50:22,513 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:50:22" (1/1) ... [2023-12-02 15:50:22,514 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:50:22" (1/1) ... [2023-12-02 15:50:22,516 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:50:22" (1/1) ... [2023-12-02 15:50:22,516 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:50:22" (1/1) ... [2023-12-02 15:50:22,522 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:50:22" (1/1) ... [2023-12-02 15:50:22,524 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:50:22" (1/1) ... [2023-12-02 15:50:22,525 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:50:22" (1/1) ... [2023-12-02 15:50:22,526 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:50:22" (1/1) ... [2023-12-02 15:50:22,529 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 15:50:22,530 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 15:50:22,531 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 15:50:22,531 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 15:50:22,532 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:50:22" (1/1) ... [2023-12-02 15:50:22,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:50:22,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbd6c4f-5819-47cc-a705-91dabe86beb7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:50:22,557 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbd6c4f-5819-47cc-a705-91dabe86beb7/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 15:50:22,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbd6c4f-5819-47cc-a705-91dabe86beb7/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 15:50:22,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 15:50:22,588 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2023-12-02 15:50:22,588 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2023-12-02 15:50:22,589 INFO L130 BoogieDeclarations]: Found specification of procedure f [2023-12-02 15:50:22,589 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2023-12-02 15:50:22,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 15:50:22,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 15:50:22,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 15:50:22,667 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 15:50:22,669 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 15:50:22,843 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 15:50:22,909 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 15:50:22,909 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 15:50:22,911 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:50:22 BoogieIcfgContainer [2023-12-02 15:50:22,911 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 15:50:22,914 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 15:50:22,914 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 15:50:22,918 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 15:50:22,918 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 03:50:22" (1/3) ... [2023-12-02 15:50:22,919 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1883becf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:50:22, skipping insertion in model container [2023-12-02 15:50:22,919 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:50:22" (2/3) ... [2023-12-02 15:50:22,919 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1883becf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:50:22, skipping insertion in model container [2023-12-02 15:50:22,919 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:50:22" (3/3) ... [2023-12-02 15:50:22,921 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_1+newton_3_8.i [2023-12-02 15:50:22,940 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 15:50:22,940 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-02 15:50:22,979 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 15:50:22,985 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;@2eb04047, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 15:50:22,985 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-02 15:50:22,988 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 15:50:22,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 15:50:22,995 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:50:22,995 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 15:50:22,996 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:50:23,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:50:23,002 INFO L85 PathProgramCache]: Analyzing trace with hash -477294563, now seen corresponding path program 1 times [2023-12-02 15:50:23,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:50:23,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289982618] [2023-12-02 15:50:23,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:50:23,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:50:23,141 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:50:23,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [193979902] [2023-12-02 15:50:23,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:50:23,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:50:23,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbd6c4f-5819-47cc-a705-91dabe86beb7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:50:23,144 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbd6c4f-5819-47cc-a705-91dabe86beb7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:50:23,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbd6c4f-5819-47cc-a705-91dabe86beb7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 15:50:23,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:50:23,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 15:50:23,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:50:23,314 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 15:50:23,315 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:50:23,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:50:23,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289982618] [2023-12-02 15:50:23,316 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:50:23,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193979902] [2023-12-02 15:50:23,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193979902] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:50:23,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:50:23,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:50:23,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153508450] [2023-12-02 15:50:23,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:50:23,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:50:23,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:50:23,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:50:23,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:50:23,351 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 15:50:23,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:50:23,396 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2023-12-02 15:50:23,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:50:23,399 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 15:50:23,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:50:23,405 INFO L225 Difference]: With dead ends: 37 [2023-12-02 15:50:23,406 INFO L226 Difference]: Without dead ends: 24 [2023-12-02 15:50:23,408 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 15:50:23,411 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 15:50:23,411 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 15:50:23,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-02 15:50:23,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-12-02 15:50:23,439 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 15:50:23,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-12-02 15:50:23,441 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 6 [2023-12-02 15:50:23,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:50:23,442 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-12-02 15:50:23,442 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 15:50:23,442 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-12-02 15:50:23,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 15:50:23,443 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:50:23,444 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:50:23,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbd6c4f-5819-47cc-a705-91dabe86beb7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 15:50:23,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbd6c4f-5819-47cc-a705-91dabe86beb7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-02 15:50:23,645 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:50:23,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:50:23,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1913486975, now seen corresponding path program 1 times [2023-12-02 15:50:23,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:50:23,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239114790] [2023-12-02 15:50:23,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:50:23,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:50:23,661 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:50:23,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [360813619] [2023-12-02 15:50:23,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:50:23,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:50:23,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbd6c4f-5819-47cc-a705-91dabe86beb7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:50:23,663 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbd6c4f-5819-47cc-a705-91dabe86beb7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:50:23,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbd6c4f-5819-47cc-a705-91dabe86beb7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 15:50:23,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:50:23,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 15:50:23,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:50:23,806 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 15:50:23,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:50:23,852 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 15:50:23,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:50:23,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239114790] [2023-12-02 15:50:23,853 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:50:23,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360813619] [2023-12-02 15:50:23,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360813619] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:50:23,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [971553379] [2023-12-02 15:50:23,870 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-12-02 15:50:23,870 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:50:23,874 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:50:23,878 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:50:23,878 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:50:24,866 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:50:25,241 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 15:50:25,242 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:50:25,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:50:25,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-12-02 15:50:25,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568688558] [2023-12-02 15:50:25,243 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:50:25,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 15:50:25,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:50:25,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 15:50:25,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-12-02 15:50:25,245 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 15:50:25,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:50:25,313 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2023-12-02 15:50:25,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 15:50:25,314 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 15:50:25,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:50:25,315 INFO L225 Difference]: With dead ends: 28 [2023-12-02 15:50:25,315 INFO L226 Difference]: Without dead ends: 25 [2023-12-02 15:50:25,316 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 15:50:25,317 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 15:50:25,318 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 15:50:25,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-02 15:50:25,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-12-02 15:50:25,323 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 15:50:25,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-12-02 15:50:25,325 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 7 [2023-12-02 15:50:25,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:50:25,325 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-12-02 15:50:25,325 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 15:50:25,325 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-12-02 15:50:25,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 15:50:25,326 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:50:25,326 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-12-02 15:50:25,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbd6c4f-5819-47cc-a705-91dabe86beb7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 15:50:25,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbd6c4f-5819-47cc-a705-91dabe86beb7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:50:25,529 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:50:25,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:50:25,529 INFO L85 PathProgramCache]: Analyzing trace with hash 809188509, now seen corresponding path program 2 times [2023-12-02 15:50:25,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:50:25,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790317441] [2023-12-02 15:50:25,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:50:25,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:50:25,541 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:50:25,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1098239269] [2023-12-02 15:50:25,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:50:25,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:50:25,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbd6c4f-5819-47cc-a705-91dabe86beb7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:50:25,543 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbd6c4f-5819-47cc-a705-91dabe86beb7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:50:25,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbd6c4f-5819-47cc-a705-91dabe86beb7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 15:50:40,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 15:50:40,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:50:40,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-02 15:50:40,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:50:50,287 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 15:51:30,425 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 15:51:54,620 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 15:51:56,623 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 15:52:18,785 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 15:52:18,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:55:33,931 WARN L854 $PredicateComparison]: unable to prove that (or (let ((.cse26 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse25 (+ |c_ULTIMATE.start_gcd_test_~a#1| 1)) (.cse28 (mod (+ .cse26 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256)) (.cse27 (mod (+ .cse26 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (let ((.cse19 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse27) 256) 0))) (.cse21 (= .cse27 0)) (.cse23 (= .cse28 0)) (.cse24 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse28) 256) 0))) (.cse9 (< 0 .cse25))) (let ((.cse8 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse28)) 256) 0))) (.cse0 (< .cse28 128)) (.cse10 (< 127 .cse28)) (.cse5 (< .cse27 128)) (.cse6 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse12 (or .cse23 .cse24 .cse9)) (.cse13 (or .cse19 .cse21 .cse9)) (.cse1 (< 127 .cse27)) (.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))) (.cse16 (mod .cse26 256))) (and (or (let ((.cse7 (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse16)) 256) 0)) (< |c_ULTIMATE.start_gcd_test_~a#1| 0)))) (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 ((.cse20 (= .cse26 0))) (let ((.cse18 (or (and (<= .cse25 0) (not .cse20)) (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse16) 256) 0)) (= .cse16 0)))) (let ((.cse22 (or .cse14 (and .cse18 (or .cse20 .cse15 .cse9))))) (and (or (let ((.cse17 (or (and .cse18 (or .cse20 .cse8 .cse9)) .cse6))) (and (or .cse1 (and .cse17 (or .cse14 (and .cse18 (or .cse19 .cse20 .cse21 .cse9))))) (or (and .cse17 .cse22) .cse5))) .cse0) (or .cse10 (and (or (and (or (and (or .cse20 .cse23 .cse24 .cse9) .cse18) .cse6) .cse22) .cse5) (or (and (or .cse6 (and .cse18 .cse12)) (or (and .cse13 .cse18) .cse14)) .cse1))))))))))))) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) is different from false [2023-12-02 15:56:19,808 WARN L293 SmtUtils]: Spent 18.77s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:57:09,088 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 15:57:11,090 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 15:57:11,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 15:57:11,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:57:11,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790317441] [2023-12-02 15:57:11,091 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:57:11,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098239269] [2023-12-02 15:57:11,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098239269] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:57:11,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1682937341] [2023-12-02 15:57:11,093 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-12-02 15:57:11,093 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:57:11,094 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:57:11,094 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:57:11,094 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:57:13,832 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:57:25,891 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 15:57:25,891 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:57:25,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:57:25,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-12-02 15:57:25,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784801703] [2023-12-02 15:57:25,891 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:57:25,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 15:57:25,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:57:25,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 15:57:25,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=100, Unknown=16, NotChecked=120, Total=272 [2023-12-02 15:57:25,893 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 15:57:27,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-02 15:57:55,709 WARN L293 SmtUtils]: Spent 19.24s on a formula simplification. DAG size of input: 46 DAG size of output: 29 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:57:57,735 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse29 (+ |c_ULTIMATE.start_gcd_test_~a#1| 1)) (.cse26 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse20 (= .cse26 0)) (.cse25 (<= .cse29 0)) (.cse30 (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse38 (+ |c_ULTIMATE.start_gcd_test_~a#1| 128))) (and (or (let ((.cse28 (mod (+ .cse26 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256)) (.cse27 (mod (+ .cse26 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (let ((.cse19 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse27) 256) 0))) (.cse21 (= .cse27 0)) (.cse23 (= .cse28 0)) (.cse24 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse28) 256) 0))) (.cse9 (< 0 .cse29))) (let ((.cse8 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse28)) 256) 0))) (.cse0 (< .cse28 128)) (.cse10 (< 127 .cse28)) (.cse5 (< .cse27 128)) (.cse6 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse12 (or .cse23 .cse24 .cse9)) (.cse13 (or .cse19 .cse21 .cse9)) (.cse1 (< 127 .cse27)) (.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))) (.cse16 (mod .cse26 256))) (and (or (let ((.cse7 (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse16)) 256) 0)) (< |c_ULTIMATE.start_gcd_test_~a#1| 0)))) (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 (and .cse25 (not .cse20)) (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse16) 256) 0)) (= .cse16 0)))) (let ((.cse22 (or .cse14 (and .cse18 (or .cse20 .cse15 .cse9))))) (and (or (let ((.cse17 (or (and .cse18 (or .cse20 .cse8 .cse9)) .cse6))) (and (or .cse1 (and .cse17 (or .cse14 (and .cse18 (or .cse19 .cse20 .cse21 .cse9))))) (or (and .cse17 .cse22) .cse5))) .cse0) (or .cse10 (and (or (and (or (and (or .cse20 .cse23 .cse24 .cse9) .cse18) .cse6) .cse22) .cse5) (or (and (or .cse6 (and .cse18 .cse12)) (or (and .cse13 .cse18) .cse14)) .cse1))))))))))) .cse30) (or (not (= (mod |c_ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_main1_~y~0#1|) 0)) (let ((.cse31 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (and (let ((.cse32 (mod (mod .cse31 |c_ULTIMATE.start_main1_~y~0#1|) 256))) (or (< 127 .cse31) (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| .cse32) 256) 0)) (= .cse32 0))) (let ((.cse33 (mod (+ .cse31 (- 256)) |c_ULTIMATE.start_main1_~y~0#1|))) (or (< .cse31 128) (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| (+ (- 256) (mod (+ .cse33 (* |c_ULTIMATE.start_main1_~y~0#1| 255)) 256))) 256) 0)) (= .cse33 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) (let ((.cse34 (<= |c_ULTIMATE.start_gcd_test_~a#1| 127)) (.cse35 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse37 (* |c_ULTIMATE.start_gcd_test_~a#1| 255))) (or (and .cse20 .cse34 .cse35) (and .cse34 .cse35 (exists ((v_y_1 Int)) (let ((.cse36 (* 256 v_y_1))) (and (<= 0 (+ .cse36 .cse37 128)) (<= (+ .cse36 .cse37 1) 0) (= (mod (+ .cse36 .cse37) |c_ULTIMATE.start_gcd_test_~b#1|) 0))))) (and (<= 0 .cse38) (exists ((v_y_3 Int)) (let ((.cse39 (* 256 v_y_3))) (and (<= (+ 65281 .cse37 .cse39) 0) (= (mod (+ 65280 .cse37 .cse39) |c_ULTIMATE.start_gcd_test_~b#1|) 0) (<= 0 (+ 65408 .cse37 .cse39))))) .cse25))) (<= |c_ULTIMATE.start_gcd_test_~b#1| 127) (<= 0 (+ 128 |c_ULTIMATE.start_main1_~x~0#1|)) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (or (not .cse30) (< 127 |c_ULTIMATE.start_gcd_test_~a#1|) (< .cse38 0)) (<= 1 |c_ULTIMATE.start_gcd_test_~b#1|)))) is different from false [2023-12-02 15:57:59,740 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse29 (+ |c_ULTIMATE.start_gcd_test_~a#1| 1)) (.cse26 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse20 (= .cse26 0)) (.cse25 (<= .cse29 0)) (.cse30 (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse38 (+ |c_ULTIMATE.start_gcd_test_~a#1| 128))) (and (or (let ((.cse28 (mod (+ .cse26 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256)) (.cse27 (mod (+ .cse26 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (let ((.cse19 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse27) 256) 0))) (.cse21 (= .cse27 0)) (.cse23 (= .cse28 0)) (.cse24 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse28) 256) 0))) (.cse9 (< 0 .cse29))) (let ((.cse8 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse28)) 256) 0))) (.cse0 (< .cse28 128)) (.cse10 (< 127 .cse28)) (.cse5 (< .cse27 128)) (.cse6 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse12 (or .cse23 .cse24 .cse9)) (.cse13 (or .cse19 .cse21 .cse9)) (.cse1 (< 127 .cse27)) (.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))) (.cse16 (mod .cse26 256))) (and (or (let ((.cse7 (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse16)) 256) 0)) (< |c_ULTIMATE.start_gcd_test_~a#1| 0)))) (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 (and .cse25 (not .cse20)) (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse16) 256) 0)) (= .cse16 0)))) (let ((.cse22 (or .cse14 (and .cse18 (or .cse20 .cse15 .cse9))))) (and (or (let ((.cse17 (or (and .cse18 (or .cse20 .cse8 .cse9)) .cse6))) (and (or .cse1 (and .cse17 (or .cse14 (and .cse18 (or .cse19 .cse20 .cse21 .cse9))))) (or (and .cse17 .cse22) .cse5))) .cse0) (or .cse10 (and (or (and (or (and (or .cse20 .cse23 .cse24 .cse9) .cse18) .cse6) .cse22) .cse5) (or (and (or .cse6 (and .cse18 .cse12)) (or (and .cse13 .cse18) .cse14)) .cse1))))))))))) .cse30) (or (not (= (mod |c_ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_main1_~y~0#1|) 0)) (let ((.cse31 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (and (let ((.cse32 (mod (mod .cse31 |c_ULTIMATE.start_main1_~y~0#1|) 256))) (or (< 127 .cse31) (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| .cse32) 256) 0)) (= .cse32 0))) (let ((.cse33 (mod (+ .cse31 (- 256)) |c_ULTIMATE.start_main1_~y~0#1|))) (or (< .cse31 128) (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| (+ (- 256) (mod (+ .cse33 (* |c_ULTIMATE.start_main1_~y~0#1| 255)) 256))) 256) 0)) (= .cse33 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) (let ((.cse34 (<= |c_ULTIMATE.start_gcd_test_~a#1| 127)) (.cse35 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse37 (* |c_ULTIMATE.start_gcd_test_~a#1| 255))) (or (and .cse20 .cse34 .cse35) (and .cse34 .cse35 (exists ((v_y_1 Int)) (let ((.cse36 (* 256 v_y_1))) (and (<= 0 (+ .cse36 .cse37 128)) (<= (+ .cse36 .cse37 1) 0) (= (mod (+ .cse36 .cse37) |c_ULTIMATE.start_gcd_test_~b#1|) 0))))) (and (<= 0 .cse38) (exists ((v_y_3 Int)) (let ((.cse39 (* 256 v_y_3))) (and (<= (+ 65281 .cse37 .cse39) 0) (= (mod (+ 65280 .cse37 .cse39) |c_ULTIMATE.start_gcd_test_~b#1|) 0) (<= 0 (+ 65408 .cse37 .cse39))))) .cse25))) (<= |c_ULTIMATE.start_gcd_test_~b#1| 127) (<= 0 (+ 128 |c_ULTIMATE.start_main1_~x~0#1|)) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (or (not .cse30) (< 127 |c_ULTIMATE.start_gcd_test_~a#1|) (< .cse38 0)) (<= 1 |c_ULTIMATE.start_gcd_test_~b#1|)))) is different from true [2023-12-02 15:58:18,023 WARN L293 SmtUtils]: Spent 15.92s 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 15:58:20,496 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 15:58:22,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:58:24,501 WARN L539 Checker$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 15:58:26,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:58:28,508 WARN L539 Checker$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 15:58:30,513 WARN L854 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_31| Int) (v_y_1 Int) (|v_ULTIMATE.start_gcd_test_~a#1_30| Int)) (let ((.cse0 (* 256 v_y_1)) (.cse1 (* 255 |v_ULTIMATE.start_gcd_test_~a#1_30|))) (and (= (mod (+ .cse0 .cse1) |v_ULTIMATE.start_gcd_test_~a#1_31|) 0) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_30| |v_ULTIMATE.start_gcd_test_~a#1_31|) 256)) (<= (+ .cse0 .cse1 1) 0) (<= 0 (+ .cse0 .cse1 128)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_30|) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_31| |c_ULTIMATE.start_gcd_test_~a#1|) 256) |c_ULTIMATE.start_gcd_test_~b#1|) (<= |v_ULTIMATE.start_gcd_test_~a#1_30| 127) (<= 1 |v_ULTIMATE.start_gcd_test_~a#1_31|)))) (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|) (or (not (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (< 127 |c_ULTIMATE.start_gcd_test_~a#1|) (< (+ |c_ULTIMATE.start_gcd_test_~a#1| 128) 0)) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false [2023-12-02 15:58:32,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 15:58:33,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Real, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 15:58:33,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:58:33,562 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2023-12-02 15:58:33,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 15:58:33,562 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 15:58:33,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:58:33,563 INFO L225 Difference]: With dead ends: 29 [2023-12-02 15:58:33,563 INFO L226 Difference]: Without dead ends: 26 [2023-12-02 15:58:33,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 110.1s TimeCoverageRelationStatistics Valid=48, Invalid=138, Unknown=24, NotChecked=210, Total=420 [2023-12-02 15:58:33,564 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 2 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time [2023-12-02 15:58:33,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 174 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 7 Unknown, 109 Unchecked, 15.5s Time] [2023-12-02 15:58:33,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-02 15:58:33,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-12-02 15:58:33,573 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 15:58:33,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-12-02 15:58:33,574 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 8 [2023-12-02 15:58:33,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:58:33,574 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-12-02 15:58:33,574 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 15:58:33,574 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-12-02 15:58:33,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 15:58:33,575 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:58:33,575 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2023-12-02 15:58:33,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbd6c4f-5819-47cc-a705-91dabe86beb7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 15:58:33,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbd6c4f-5819-47cc-a705-91dabe86beb7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:58:33,776 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:58:33,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:58:33,776 INFO L85 PathProgramCache]: Analyzing trace with hash -687217407, now seen corresponding path program 3 times [2023-12-02 15:58:33,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:58:33,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439183749] [2023-12-02 15:58:33,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:58:33,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:58:33,786 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:58:33,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [351812836] [2023-12-02 15:58:33,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 15:58:33,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:58:33,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbd6c4f-5819-47cc-a705-91dabe86beb7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:58:33,789 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbd6c4f-5819-47cc-a705-91dabe86beb7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:58:33,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dbd6c4f-5819-47cc-a705-91dabe86beb7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 15:58:36,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 15:58:36,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:58:36,201 WARN L260 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-02 15:58:36,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:58:38,357 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 15:59:07,252 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 15:59:35,038 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 [2023-12-02 16:00:20,394 WARN L854 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_main1_~y~0#1| Int) (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| |ULTIMATE.start_main1_~y~0#1|) 256))) (let ((.cse1 (mod (mod |ULTIMATE.start_main1_~y~0#1| .cse0) 256)) (.cse2 (* 255 |v_ULTIMATE.start_gcd_test_~a#1_39|)) (.cse3 (* v_y_13 256))) (and (= (mod (mod .cse0 .cse1) 256) 0) (not (= .cse0 0)) (<= |v_ULTIMATE.start_gcd_test_~a#1_39| 127) (= (mod (+ .cse2 .cse3) |ULTIMATE.start_main1_~y~0#1|) 0) (<= (+ .cse2 .cse3 1) 0) (<= 1 |ULTIMATE.start_main1_~y~0#1|) (not (= .cse1 0)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_39|) (<= 0 (+ .cse2 128 .cse3)))))) (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| 0)) is different from false [2023-12-02 16:00:49,653 WARN L854 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~y~0#1| Int) (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| |ULTIMATE.start_main1_~y~0#1|) 256))) (let ((.cse1 (mod (mod |ULTIMATE.start_main1_~y~0#1| .cse0) 256)) (.cse2 (* 255 |v_ULTIMATE.start_gcd_test_~a#1_39|)) (.cse3 (* v_y_13 256))) (and (= (mod (mod .cse0 .cse1) 256) 0) (not (= .cse0 0)) (<= |v_ULTIMATE.start_gcd_test_~a#1_39| 127) (= (mod (+ .cse2 .cse3) |ULTIMATE.start_main1_~y~0#1|) 0) (<= (+ .cse2 .cse3 1) 0) (<= 1 |ULTIMATE.start_main1_~y~0#1|) (not (= .cse1 0)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_39|) (<= 0 (+ .cse2 128 .cse3)))))) is different from false [2023-12-02 16:00:50,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-12-02 16:00:50,933 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:04:57,098 WARN L876 $PredicateComparison]: unable to prove that (or (let ((.cse24 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse33 (mod (+ .cse24 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256)) (.cse32 (mod (+ .cse24 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (let ((.cse16 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse32) 256) 0))) (.cse17 (= .cse32 0)) (.cse18 (= |c_ULTIMATE.start_main1_~y~0#1| .cse32)) (.cse31 (+ |c_ULTIMATE.start_main1_~y~0#1| 256)) (.cse5 (= .cse33 0)) (.cse6 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse33) 256) 0))) (.cse7 (< 0 (+ |c_ULTIMATE.start_gcd_test_~a#1| 1))) (.cse8 (= |c_ULTIMATE.start_main1_~y~0#1| .cse33))) (let ((.cse1 (< 127 .cse33)) (.cse13 (or .cse5 .cse6 .cse7 .cse8)) (.cse15 (< .cse33 128)) (.cse10 (< .cse32 128)) (.cse14 (< 127 .cse32)) (.cse9 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse20 (= .cse33 .cse31)) (.cse21 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse33)) 256) 0))) (.cse12 (or .cse16 .cse17 .cse18 .cse7)) (.cse11 (< 0 (+ |c_ULTIMATE.start_gcd_test_~b#1| 1))) (.cse22 (= .cse32 .cse31)) (.cse23 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse32)) 256) 0))) (.cse25 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse0 (mod .cse24 256))) (and (or (< 127 .cse0) (let ((.cse3 (or .cse25 (= |c_ULTIMATE.start_main1_~y~0#1| .cse0) (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse0) 256) 0)) (= .cse0 0))) (.cse4 (= .cse24 0))) (let ((.cse2 (or .cse11 (and .cse3 (or .cse4 .cse22 .cse23 .cse7))))) (and (or .cse1 (and (or (and .cse2 (or (and .cse3 (or .cse4 .cse5 .cse6 .cse7 .cse8)) .cse9)) .cse10) (or (and (or .cse11 (and .cse3 .cse12)) (or (and .cse3 .cse13) .cse9)) .cse14))) (or .cse15 (let ((.cse19 (or (and .cse3 (or .cse4 .cse20 .cse21 .cse7)) .cse9))) (and (or (and (or .cse11 (and .cse3 (or .cse16 .cse4 .cse17 .cse18 .cse7))) .cse19) .cse14) (or (and .cse2 .cse19) .cse10)))))))) (or (< .cse0 128) (let ((.cse29 (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse0)) 256) 0)) .cse25 (= .cse0 .cse31)))) (let ((.cse28 (or .cse11 (and (or .cse22 .cse23 .cse7) .cse29))) (.cse27 (or .cse11 (and .cse29 .cse12)))) (and (or .cse1 (let ((.cse26 (or .cse9 (and .cse29 .cse13)))) (and (or (and .cse26 .cse27) .cse14) (or (and .cse26 .cse28) .cse10)))) (or .cse15 (let ((.cse30 (or .cse9 (and (or .cse20 .cse21 .cse7) .cse29)))) (and (or (and .cse30 .cse28) .cse10) (or .cse14 (and .cse30 .cse27)))))))))))))) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) is different from true