./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_4+newton_3_2.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_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/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_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_4+newton_3_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/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_c81e2b6d-147e-4a68-b7f8-38522eff12ce/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 19e5e10e8b882a2339014fe22e262bc9b50fc611ccb496d82df2ea8022cd18a7 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 12:28:32,233 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 12:28:32,299 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 12:28:32,304 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 12:28:32,304 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 12:28:32,329 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 12:28:32,329 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 12:28:32,330 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 12:28:32,331 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 12:28:32,331 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 12:28:32,332 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 12:28:32,332 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 12:28:32,333 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 12:28:32,333 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 12:28:32,334 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 12:28:32,334 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 12:28:32,335 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 12:28:32,335 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 12:28:32,336 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 12:28:32,336 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 12:28:32,337 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 12:28:32,338 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 12:28:32,338 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 12:28:32,339 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 12:28:32,339 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 12:28:32,340 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 12:28:32,340 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 12:28:32,340 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 12:28:32,341 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 12:28:32,341 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 12:28:32,342 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 12:28:32,342 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 12:28:32,342 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 12:28:32,342 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 12:28:32,343 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 12:28:32,343 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 12:28:32,343 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 12:28:32,343 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:28:32,344 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 12:28:32,344 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 12:28:32,344 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 12:28:32,344 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 12:28:32,345 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 12:28:32,345 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 12:28:32,345 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 12:28:32,345 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 12:28:32,345 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 12:28:32,345 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_c81e2b6d-147e-4a68-b7f8-38522eff12ce/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 19e5e10e8b882a2339014fe22e262bc9b50fc611ccb496d82df2ea8022cd18a7 [2023-12-02 12:28:32,564 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 12:28:32,587 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 12:28:32,589 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 12:28:32,591 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 12:28:32,591 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 12:28:32,592 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/combinations/gcd_4+newton_3_2.i [2023-12-02 12:28:35,433 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 12:28:35,597 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 12:28:35,598 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/sv-benchmarks/c/combinations/gcd_4+newton_3_2.i [2023-12-02 12:28:35,607 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/data/5c0deb8be/c529f608188d4c48bfc02a3314f25824/FLAGa051d18dd [2023-12-02 12:28:35,620 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/data/5c0deb8be/c529f608188d4c48bfc02a3314f25824 [2023-12-02 12:28:35,622 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 12:28:35,623 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 12:28:35,624 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 12:28:35,624 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 12:28:35,630 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 12:28:35,631 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:28:35" (1/1) ... [2023-12-02 12:28:35,632 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@268752c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:28:35, skipping insertion in model container [2023-12-02 12:28:35,632 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:28:35" (1/1) ... [2023-12-02 12:28:35,658 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 12:28:35,809 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_c81e2b6d-147e-4a68-b7f8-38522eff12ce/sv-benchmarks/c/combinations/gcd_4+newton_3_2.i[1224,1237] [2023-12-02 12:28:35,837 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_c81e2b6d-147e-4a68-b7f8-38522eff12ce/sv-benchmarks/c/combinations/gcd_4+newton_3_2.i[2848,2861] [2023-12-02 12:28:35,839 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:28:35,850 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 12:28:35,863 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_c81e2b6d-147e-4a68-b7f8-38522eff12ce/sv-benchmarks/c/combinations/gcd_4+newton_3_2.i[1224,1237] [2023-12-02 12:28:35,874 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_c81e2b6d-147e-4a68-b7f8-38522eff12ce/sv-benchmarks/c/combinations/gcd_4+newton_3_2.i[2848,2861] [2023-12-02 12:28:35,876 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:28:35,888 INFO L206 MainTranslator]: Completed translation [2023-12-02 12:28:35,889 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:28:35 WrapperNode [2023-12-02 12:28:35,889 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 12:28:35,890 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 12:28:35,890 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 12:28:35,890 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 12:28:35,895 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:28:35" (1/1) ... [2023-12-02 12:28:35,903 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:28:35" (1/1) ... [2023-12-02 12:28:35,921 INFO L138 Inliner]: procedures = 27, calls = 28, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 86 [2023-12-02 12:28:35,921 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 12:28:35,921 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 12:28:35,922 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 12:28:35,922 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 12:28:35,929 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:28:35" (1/1) ... [2023-12-02 12:28:35,929 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:28:35" (1/1) ... [2023-12-02 12:28:35,931 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:28:35" (1/1) ... [2023-12-02 12:28:35,931 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:28:35" (1/1) ... [2023-12-02 12:28:35,935 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:28:35" (1/1) ... [2023-12-02 12:28:35,938 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:28:35" (1/1) ... [2023-12-02 12:28:35,939 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:28:35" (1/1) ... [2023-12-02 12:28:35,940 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:28:35" (1/1) ... [2023-12-02 12:28:35,942 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 12:28:35,943 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 12:28:35,943 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 12:28:35,943 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 12:28:35,944 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:28:35" (1/1) ... [2023-12-02 12:28:35,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:28:35,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:28:35,973 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 12:28:35,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 12:28:36,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 12:28:36,011 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2023-12-02 12:28:36,011 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2023-12-02 12:28:36,011 INFO L130 BoogieDeclarations]: Found specification of procedure f [2023-12-02 12:28:36,011 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2023-12-02 12:28:36,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 12:28:36,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 12:28:36,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 12:28:36,012 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 12:28:36,012 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 12:28:36,073 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 12:28:36,075 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 12:28:36,228 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 12:28:36,282 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 12:28:36,283 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 12:28:36,284 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:28:36 BoogieIcfgContainer [2023-12-02 12:28:36,284 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 12:28:36,288 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 12:28:36,288 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 12:28:36,291 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 12:28:36,291 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:28:35" (1/3) ... [2023-12-02 12:28:36,292 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52162cb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:28:36, skipping insertion in model container [2023-12-02 12:28:36,292 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:28:35" (2/3) ... [2023-12-02 12:28:36,293 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52162cb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:28:36, skipping insertion in model container [2023-12-02 12:28:36,293 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:28:36" (3/3) ... [2023-12-02 12:28:36,294 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_3_2.i [2023-12-02 12:28:36,310 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 12:28:36,310 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-02 12:28:36,354 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 12:28:36,359 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;@32c8f464, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 12:28:36,359 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-02 12:28:36,363 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 19 states have (on average 1.368421052631579) internal successors, (26), 21 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 12:28:36,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 12:28:36,369 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:28:36,369 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:28:36,370 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:28:36,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:28:36,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1068580920, now seen corresponding path program 1 times [2023-12-02 12:28:36,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:28:36,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348021220] [2023-12-02 12:28:36,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:28:36,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:28:36,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:28:36,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:28:36,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348021220] [2023-12-02 12:28:36,502 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-02 12:28:36,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545422187] [2023-12-02 12:28:36,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:28:36,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:28:36,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:28:36,509 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:28:36,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 12:28:36,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:28:36,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 12:28:36,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:28:36,662 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 12:28:36,662 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:28:36,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545422187] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:28:36,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:28:36,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:28:36,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631251880] [2023-12-02 12:28:36,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:28:36,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:28:36,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:28:36,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:28:36,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:28:36,695 INFO L87 Difference]: Start difference. First operand has 34 states, 19 states have (on average 1.368421052631579) internal successors, (26), 21 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:28:36,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:28:36,740 INFO L93 Difference]: Finished difference Result 50 states and 66 transitions. [2023-12-02 12:28:36,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:28:36,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-12-02 12:28:36,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:28:36,749 INFO L225 Difference]: With dead ends: 50 [2023-12-02 12:28:36,749 INFO L226 Difference]: Without dead ends: 32 [2023-12-02 12:28:36,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:28:36,756 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:28:36,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 59 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:28:36,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-12-02 12:28:36,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2023-12-02 12:28:36,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 12:28:36,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2023-12-02 12:28:36,794 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 8 [2023-12-02 12:28:36,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:28:36,794 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2023-12-02 12:28:36,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:28:36,795 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2023-12-02 12:28:36,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 12:28:36,796 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:28:36,796 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:28:36,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 12:28:37,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:28:37,002 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:28:37,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:28:37,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1339281041, now seen corresponding path program 1 times [2023-12-02 12:28:37,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:28:37,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751330776] [2023-12-02 12:28:37,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:28:37,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:28:37,020 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:28:37,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1675845558] [2023-12-02 12:28:37,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:28:37,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:28:37,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:28:37,022 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:28:37,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 12:28:37,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:28:37,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 12:28:37,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:28:37,105 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 12:28:37,105 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:28:37,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:28:37,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751330776] [2023-12-02 12:28:37,106 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:28:37,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675845558] [2023-12-02 12:28:37,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675845558] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:28:37,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:28:37,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:28:37,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927340854] [2023-12-02 12:28:37,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:28:37,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:28:37,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:28:37,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:28:37,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:28:37,109 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:28:37,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:28:37,130 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2023-12-02 12:28:37,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:28:37,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-02 12:28:37,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:28:37,131 INFO L225 Difference]: With dead ends: 41 [2023-12-02 12:28:37,132 INFO L226 Difference]: Without dead ends: 31 [2023-12-02 12:28:37,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:28:37,133 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:28:37,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:28:37,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-02 12:28:37,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-12-02 12:28:37,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 12:28:37,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2023-12-02 12:28:37,141 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 9 [2023-12-02 12:28:37,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:28:37,141 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2023-12-02 12:28:37,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:28:37,142 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2023-12-02 12:28:37,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 12:28:37,142 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:28:37,143 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:28:37,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-02 12:28:37,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:28:37,343 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:28:37,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:28:37,344 INFO L85 PathProgramCache]: Analyzing trace with hash 153803597, now seen corresponding path program 1 times [2023-12-02 12:28:37,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:28:37,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305054763] [2023-12-02 12:28:37,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:28:37,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:28:37,361 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:28:37,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [261884248] [2023-12-02 12:28:37,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:28:37,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:28:37,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:28:37,363 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:28:37,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 12:28:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:28:37,420 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 12:28:37,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:28:37,468 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 12:28:37,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:28:37,513 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 12:28:37,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:28:37,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305054763] [2023-12-02 12:28:37,514 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:28:37,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261884248] [2023-12-02 12:28:37,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261884248] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:28:37,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [541247624] [2023-12-02 12:28:37,533 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-12-02 12:28:37,533 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:28:37,536 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:28:37,540 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:28:37,540 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:28:38,126 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 48 for LOIs [2023-12-02 12:28:38,203 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:28:38,770 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '363#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_gcd_test_#res#1_BEFORE_CALL_1| Int)) (and (<= 0 (+ |v_ULTIMATE.start_gcd_test_#res#1_BEFORE_CALL_1| 2147483648)) (not (= (mod 63 |v_ULTIMATE.start_gcd_test_#res#1_BEFORE_CALL_1|) 0)) (<= |v_ULTIMATE.start_gcd_test_#res#1_BEFORE_CALL_1| 2147483647))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 12:28:38,770 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:28:38,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:28:38,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-12-02 12:28:38,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995678131] [2023-12-02 12:28:38,771 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:28:38,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:28:38,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:28:38,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:28:38,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-12-02 12:28:38,773 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:28:38,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:28:38,824 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2023-12-02 12:28:38,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 12:28:38,827 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-02 12:28:38,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:28:38,828 INFO L225 Difference]: With dead ends: 43 [2023-12-02 12:28:38,828 INFO L226 Difference]: Without dead ends: 33 [2023-12-02 12:28:38,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-12-02 12:28:38,830 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:28:38,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 82 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:28:38,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-12-02 12:28:38,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-12-02 12:28:38,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 12:28:38,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2023-12-02 12:28:38,838 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 10 [2023-12-02 12:28:38,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:28:38,838 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2023-12-02 12:28:38,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:28:38,839 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2023-12-02 12:28:38,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 12:28:38,839 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:28:38,839 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:28:38,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 12:28:39,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:28:39,044 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:28:39,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:28:39,044 INFO L85 PathProgramCache]: Analyzing trace with hash -469952627, now seen corresponding path program 2 times [2023-12-02 12:28:39,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:28:39,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992525881] [2023-12-02 12:28:39,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:28:39,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:28:39,066 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:28:39,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1040430616] [2023-12-02 12:28:39,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:28:39,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:28:39,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:28:39,068 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:28:39,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 12:28:39,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 12:28:39,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:28:39,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 12:28:39,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:28:39,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:28:39,192 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:28:39,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:28:39,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:28:39,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992525881] [2023-12-02 12:28:39,432 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:28:39,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040430616] [2023-12-02 12:28:39,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040430616] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:28:39,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [364742254] [2023-12-02 12:28:39,434 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-12-02 12:28:39,435 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:28:39,435 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:28:39,435 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:28:39,435 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:28:39,701 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2023-12-02 12:28:39,738 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:28:40,205 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '561#(and (exists ((|v_ULTIMATE.start_main1_~g~0#1_BEFORE_CALL_2| Int)) (and (<= |v_ULTIMATE.start_main1_~g~0#1_BEFORE_CALL_2| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main1_~g~0#1_BEFORE_CALL_2| 2147483648)) (not (= (mod 63 |v_ULTIMATE.start_main1_~g~0#1_BEFORE_CALL_2|) 0)))) (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 12:28:40,205 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:28:40,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:28:40,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-12-02 12:28:40,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078033382] [2023-12-02 12:28:40,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:28:40,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 12:28:40,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:28:40,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 12:28:40,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-12-02 12:28:40,208 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:28:40,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:28:40,333 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2023-12-02 12:28:40,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 12:28:40,334 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-02 12:28:40,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:28:40,335 INFO L225 Difference]: With dead ends: 44 [2023-12-02 12:28:40,335 INFO L226 Difference]: Without dead ends: 34 [2023-12-02 12:28:40,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2023-12-02 12:28:40,336 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:28:40,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 217 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:28:40,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-12-02 12:28:40,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-12-02 12:28:40,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 12:28:40,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2023-12-02 12:28:40,352 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 12 [2023-12-02 12:28:40,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:28:40,352 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2023-12-02 12:28:40,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:28:40,353 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2023-12-02 12:28:40,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 12:28:40,353 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:28:40,354 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:28:40,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 12:28:40,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:28:40,559 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:28:40,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:28:40,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1333180655, now seen corresponding path program 3 times [2023-12-02 12:28:40,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:28:40,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319580528] [2023-12-02 12:28:40,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:28:40,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:28:40,576 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:28:40,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [307273113] [2023-12-02 12:28:40,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 12:28:40,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:28:40,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:28:40,579 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:28:40,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 12:28:40,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 12:28:40,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:28:40,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 12:28:40,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:28:40,694 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:28:40,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:28:41,137 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:28:41,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:28:41,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319580528] [2023-12-02 12:28:41,138 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:28:41,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307273113] [2023-12-02 12:28:41,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307273113] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:28:41,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [276039955] [2023-12-02 12:28:41,140 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-12-02 12:28:41,141 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:28:41,141 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:28:41,141 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:28:41,141 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:28:41,364 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2023-12-02 12:28:41,392 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:28:41,862 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '771#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_gcd_test_#res#1_BEFORE_CALL_3| Int)) (and (<= |v_ULTIMATE.start_gcd_test_#res#1_BEFORE_CALL_3| 2147483647) (<= 0 (+ |v_ULTIMATE.start_gcd_test_#res#1_BEFORE_CALL_3| 2147483648)) (not (= (mod 63 |v_ULTIMATE.start_gcd_test_#res#1_BEFORE_CALL_3|) 0)))))' at error location [2023-12-02 12:28:41,862 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:28:41,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:28:41,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-12-02 12:28:41,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363878523] [2023-12-02 12:28:41,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:28:41,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 12:28:41,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:28:41,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 12:28:41,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-12-02 12:28:41,863 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:28:42,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:28:42,139 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2023-12-02 12:28:42,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 12:28:42,139 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-02 12:28:42,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:28:42,140 INFO L225 Difference]: With dead ends: 49 [2023-12-02 12:28:42,140 INFO L226 Difference]: Without dead ends: 39 [2023-12-02 12:28:42,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2023-12-02 12:28:42,142 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 3 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:28:42,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 163 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:28:42,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-12-02 12:28:42,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-12-02 12:28:42,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.16) internal successors, (29), 27 states have internal predecessors, (29), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 12:28:42,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2023-12-02 12:28:42,157 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 13 [2023-12-02 12:28:42,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:28:42,157 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2023-12-02 12:28:42,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:28:42,157 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2023-12-02 12:28:42,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 12:28:42,158 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:28:42,158 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:28:42,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 12:28:42,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:28:42,359 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:28:42,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:28:42,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1395737549, now seen corresponding path program 4 times [2023-12-02 12:28:42,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:28:42,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291869298] [2023-12-02 12:28:42,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:28:42,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:28:42,374 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:28:42,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1936431245] [2023-12-02 12:28:42,375 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 12:28:42,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:28:42,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:28:42,376 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:28:42,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 12:28:42,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:28:42,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-02 12:28:42,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:28:42,571 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:28:42,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:28:59,291 WARN L293 SmtUtils]: Spent 7.10s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:29:34,901 WARN L293 SmtUtils]: Spent 18.61s on a formula simplification. DAG size of input: 85 DAG size of output: 85 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:30:20,372 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse13 (* |c_ULTIMATE.start_gcd_test_~a#1| 2)) (.cse5 (+ |c_ULTIMATE.start_gcd_test_~b#1| 1))) (let ((.cse2 (* |c_ULTIMATE.start_gcd_test_~a#1| 4)) (.cse9 (* |c_ULTIMATE.start_gcd_test_~b#1| 4)) (.cse11 (* |c_ULTIMATE.start_gcd_test_~b#1| (- 3))) (.cse1 (* |c_ULTIMATE.start_gcd_test_~b#1| 5)) (.cse6 (< .cse13 .cse5)) (.cse14 (* |c_ULTIMATE.start_gcd_test_~b#1| 8)) (.cse16 (* |c_ULTIMATE.start_gcd_test_~b#1| (- 5))) (.cse15 (* 7 |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse0 (< |c_ULTIMATE.start_gcd_test_~a#1| .cse5)) (.cse17 (* |c_ULTIMATE.start_gcd_test_~b#1| (- 4))) (.cse12 (< |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse18 (* |c_ULTIMATE.start_gcd_test_~a#1| 8)) (.cse3 (* (- 1) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse4 (* 7 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse10 (* |c_ULTIMATE.start_gcd_test_~a#1| 5)) (.cse7 (* (- 2) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse8 (* |c_ULTIMATE.start_gcd_test_~a#1| 3))) (and (or .cse0 (not (= .cse1 .cse2)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse3)) 0)) (or (not (= .cse4 (* |c_ULTIMATE.start_gcd_test_~b#1| 2))) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse2 .cse3)) 0) (< .cse2 .cse5)) (or .cse6 (and (or (not (= .cse4 .cse1)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse7 .cse8)) 0)) (or (not (= .cse9 .cse10)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse11 .cse2)) 0))) .cse12) (or (and (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse11 .cse13)) 0) (not (= .cse14 .cse10))) (or (not (= .cse2 .cse15)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse16 .cse8)) 0))) .cse0) (or .cse0 (and (or (not (= |c_ULTIMATE.start_gcd_test_~a#1| .cse1)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse17)) 0)) (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse11)) 0) (not (= .cse13 .cse15))))) (or (and (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse13 .cse3)) 0) (not (= .cse4 .cse9))) (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse11 .cse10)) 0) (not (= .cse1 .cse18)))) .cse6) (or .cse0 (and (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse7)) 0) (not (= .cse8 .cse15))) (or (not (= .cse14 .cse8)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse16 .cse13)) 0)))) (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 0) (= |c_ULTIMATE.start_gcd_test_~a#1| 0) (not (= |c_ULTIMATE.start_gcd_test_~b#1| .cse10)) .cse12) (or (not (= .cse10 .cse15)) .cse0 (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse8 .cse17)) 0)) (or .cse12 (let ((.cse19 (* |c_ULTIMATE.start_gcd_test_~b#1| 3))) (and (or (not (= .cse19 .cse18)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse8 .cse3)) 0)) (or (not (= .cse4 .cse19)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse10 .cse7)) 0)))) (< .cse8 .cse5))))) is different from false [2023-12-02 12:31:55,605 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse7 (* |c_ULTIMATE.start_gcd_test_~a#1| 2)) (.cse5 (+ |c_ULTIMATE.start_gcd_test_~b#1| 1))) (let ((.cse8 (* |c_ULTIMATE.start_gcd_test_~b#1| 8)) (.cse11 (* |c_ULTIMATE.start_gcd_test_~b#1| (- 5))) (.cse16 (< .cse7 .cse5)) (.cse1 (* |c_ULTIMATE.start_gcd_test_~b#1| 5)) (.cse14 (* |c_ULTIMATE.start_gcd_test_~b#1| 4)) (.cse6 (* |c_ULTIMATE.start_gcd_test_~b#1| (- 3))) (.cse2 (* |c_ULTIMATE.start_gcd_test_~a#1| 4)) (.cse10 (* 7 |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse0 (< |c_ULTIMATE.start_gcd_test_~a#1| .cse5)) (.cse13 (* |c_ULTIMATE.start_gcd_test_~b#1| (- 4))) (.cse15 (* |c_ULTIMATE.start_gcd_test_~a#1| 8)) (.cse3 (* (- 1) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse4 (* 7 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse9 (* |c_ULTIMATE.start_gcd_test_~a#1| 5)) (.cse17 (* (- 2) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse12 (* |c_ULTIMATE.start_gcd_test_~a#1| 3))) (and (or .cse0 (not (= .cse1 .cse2)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse3)) 0)) (or (not (= .cse4 (* |c_ULTIMATE.start_gcd_test_~b#1| 2))) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse2 .cse3)) 0) (< .cse2 .cse5)) (or (and (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse6 .cse7)) 0) (not (= .cse8 .cse9))) (or (not (= .cse2 .cse10)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse11 .cse12)) 0))) .cse0) (or .cse0 (and (or (not (= |c_ULTIMATE.start_gcd_test_~a#1| .cse1)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse13)) 0)) (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse6)) 0) (not (= .cse7 .cse10))))) (or (and (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse7 .cse3)) 0) (not (= .cse4 .cse14))) (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse6 .cse9)) 0) (not (= .cse1 .cse15)))) .cse16) (or .cse0 (and (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse17)) 0) (not (= .cse12 .cse10))) (or (not (= .cse8 .cse12)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse11 .cse7)) 0)))) (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 0) (= |c_ULTIMATE.start_gcd_test_~a#1| 0) (not (= |c_ULTIMATE.start_gcd_test_~b#1| .cse9)) (< |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_gcd_test_~a#1|)) (or .cse16 (and (or (not (= .cse4 .cse1)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse17 .cse12)) 0)) (or (not (= .cse14 .cse9)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse6 .cse2)) 0)))) (or (not (= .cse9 .cse10)) .cse0 (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse12 .cse13)) 0)) (or (let ((.cse18 (* |c_ULTIMATE.start_gcd_test_~b#1| 3))) (and (or (not (= .cse18 .cse15)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse12 .cse3)) 0)) (or (not (= .cse4 .cse18)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse9 .cse17)) 0)))) (< .cse12 .cse5))))) is different from true [2023-12-02 12:31:55,626 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-12-02 12:31:55,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:31:55,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291869298] [2023-12-02 12:31:55,627 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:31:55,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936431245] [2023-12-02 12:31:55,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936431245] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:31:55,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [770188880] [2023-12-02 12:31:55,629 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-12-02 12:31:55,629 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:31:55,630 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:31:55,630 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:31:55,630 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:31:55,790 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2023-12-02 12:31:55,807 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:31:56,716 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1026#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main1_~g~0#1_BEFORE_CALL_5| Int)) (and (<= 0 (+ |v_ULTIMATE.start_main1_~g~0#1_BEFORE_CALL_5| 2147483648)) (<= |v_ULTIMATE.start_main1_~g~0#1_BEFORE_CALL_5| 2147483647) (not (= (mod 63 |v_ULTIMATE.start_main1_~g~0#1_BEFORE_CALL_5|) 0)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 12:31:56,716 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:31:56,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:31:56,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2023-12-02 12:31:56,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641656670] [2023-12-02 12:31:56,716 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:31:56,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-02 12:31:56,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:31:56,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-02 12:31:56,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=710, Unknown=2, NotChecked=110, Total=930 [2023-12-02 12:31:56,719 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 23 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:31:58,796 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse7 (* |c_ULTIMATE.start_gcd_test_~a#1| 2)) (.cse5 (+ |c_ULTIMATE.start_gcd_test_~b#1| 1))) (let ((.cse8 (* |c_ULTIMATE.start_gcd_test_~b#1| 8)) (.cse11 (* |c_ULTIMATE.start_gcd_test_~b#1| (- 5))) (.cse16 (< .cse7 .cse5)) (.cse1 (* |c_ULTIMATE.start_gcd_test_~b#1| 5)) (.cse14 (* |c_ULTIMATE.start_gcd_test_~b#1| 4)) (.cse6 (* |c_ULTIMATE.start_gcd_test_~b#1| (- 3))) (.cse2 (* |c_ULTIMATE.start_gcd_test_~a#1| 4)) (.cse10 (* 7 |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse0 (< |c_ULTIMATE.start_gcd_test_~a#1| .cse5)) (.cse13 (* |c_ULTIMATE.start_gcd_test_~b#1| (- 4))) (.cse15 (* |c_ULTIMATE.start_gcd_test_~a#1| 8)) (.cse3 (* (- 1) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse4 (* 7 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse9 (* |c_ULTIMATE.start_gcd_test_~a#1| 5)) (.cse17 (* (- 2) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse12 (* |c_ULTIMATE.start_gcd_test_~a#1| 3))) (and (or .cse0 (not (= .cse1 .cse2)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse3)) 0)) (or (not (= .cse4 (* |c_ULTIMATE.start_gcd_test_~b#1| 2))) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse2 .cse3)) 0) (< .cse2 .cse5)) (or (and (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse6 .cse7)) 0) (not (= .cse8 .cse9))) (or (not (= .cse2 .cse10)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse11 .cse12)) 0))) .cse0) (or .cse0 (and (or (not (= |c_ULTIMATE.start_gcd_test_~a#1| .cse1)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse13)) 0)) (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse6)) 0) (not (= .cse7 .cse10))))) (or (and (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse7 .cse3)) 0) (not (= .cse4 .cse14))) (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse6 .cse9)) 0) (not (= .cse1 .cse15)))) .cse16) (or .cse0 (and (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse17)) 0) (not (= .cse12 .cse10))) (or (not (= .cse8 .cse12)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse11 .cse7)) 0)))) (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 0) (= |c_ULTIMATE.start_gcd_test_~a#1| 0) (not (= |c_ULTIMATE.start_gcd_test_~b#1| .cse9)) (< |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_gcd_test_~a#1|)) (or .cse16 (and (or (not (= .cse4 .cse1)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse17 .cse12)) 0)) (or (not (= .cse14 .cse9)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse6 .cse2)) 0)))) (= 63 |c_ULTIMATE.start_main1_~x~0#1|) (= |c_ULTIMATE.start_gcd_test_~b#1| 18) (or (not (= .cse9 .cse10)) .cse0 (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse12 .cse13)) 0)) (or (let ((.cse18 (* |c_ULTIMATE.start_gcd_test_~b#1| 3))) (and (or (not (= .cse18 .cse15)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse12 .cse3)) 0)) (or (not (= .cse4 .cse18)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse9 .cse17)) 0)))) (< .cse12 .cse5)) (= |c_ULTIMATE.start_gcd_test_~a#1| 63)))) is different from true [2023-12-02 12:32:00,811 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse13 (* |c_ULTIMATE.start_gcd_test_~a#1| 2)) (.cse5 (+ |c_ULTIMATE.start_gcd_test_~b#1| 1))) (let ((.cse2 (* |c_ULTIMATE.start_gcd_test_~a#1| 4)) (.cse9 (* |c_ULTIMATE.start_gcd_test_~b#1| 4)) (.cse11 (* |c_ULTIMATE.start_gcd_test_~b#1| (- 3))) (.cse1 (* |c_ULTIMATE.start_gcd_test_~b#1| 5)) (.cse6 (< .cse13 .cse5)) (.cse14 (* |c_ULTIMATE.start_gcd_test_~b#1| 8)) (.cse16 (* |c_ULTIMATE.start_gcd_test_~b#1| (- 5))) (.cse15 (* 7 |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse0 (< |c_ULTIMATE.start_gcd_test_~a#1| .cse5)) (.cse17 (* |c_ULTIMATE.start_gcd_test_~b#1| (- 4))) (.cse12 (< |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse18 (* |c_ULTIMATE.start_gcd_test_~a#1| 8)) (.cse3 (* (- 1) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse4 (* 7 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse10 (* |c_ULTIMATE.start_gcd_test_~a#1| 5)) (.cse7 (* (- 2) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse8 (* |c_ULTIMATE.start_gcd_test_~a#1| 3))) (and (or .cse0 (not (= .cse1 .cse2)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse3)) 0)) (or (not (= .cse4 (* |c_ULTIMATE.start_gcd_test_~b#1| 2))) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse2 .cse3)) 0) (< .cse2 .cse5)) (or .cse6 (and (or (not (= .cse4 .cse1)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse7 .cse8)) 0)) (or (not (= .cse9 .cse10)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse11 .cse2)) 0))) .cse12) (or (and (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse11 .cse13)) 0) (not (= .cse14 .cse10))) (or (not (= .cse2 .cse15)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse16 .cse8)) 0))) .cse0) (or .cse0 (and (or (not (= |c_ULTIMATE.start_gcd_test_~a#1| .cse1)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse17)) 0)) (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse11)) 0) (not (= .cse13 .cse15))))) (or (and (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse13 .cse3)) 0) (not (= .cse4 .cse9))) (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse11 .cse10)) 0) (not (= .cse1 .cse18)))) .cse6) (or .cse0 (and (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse7)) 0) (not (= .cse8 .cse15))) (or (not (= .cse14 .cse8)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse16 .cse13)) 0)))) (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 0) (= |c_ULTIMATE.start_gcd_test_~a#1| 0) (not (= |c_ULTIMATE.start_gcd_test_~b#1| .cse10)) .cse12) (= 63 |c_ULTIMATE.start_main1_~x~0#1|) (= |c_ULTIMATE.start_gcd_test_~b#1| 18) (or (not (= .cse10 .cse15)) .cse0 (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse8 .cse17)) 0)) (or .cse12 (let ((.cse19 (* |c_ULTIMATE.start_gcd_test_~b#1| 3))) (and (or (not (= .cse19 .cse18)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse8 .cse3)) 0)) (or (not (= .cse4 .cse19)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse10 .cse7)) 0)))) (< .cse8 .cse5)) (= |c_ULTIMATE.start_gcd_test_~a#1| 63)))) is different from true [2023-12-02 12:32:02,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:32:02,143 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2023-12-02 12:32:02,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 12:32:02,144 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-02 12:32:02,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:32:02,145 INFO L225 Difference]: With dead ends: 53 [2023-12-02 12:32:02,145 INFO L226 Difference]: Without dead ends: 36 [2023-12-02 12:32:02,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 42.1s TimeCoverageRelationStatistics Valid=134, Invalid=870, Unknown=4, NotChecked=252, Total=1260 [2023-12-02 12:32:02,147 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 13 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:32:02,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 276 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 155 Invalid, 0 Unknown, 97 Unchecked, 1.2s Time] [2023-12-02 12:32:02,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-12-02 12:32:02,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-12-02 12:32:02,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 12:32:02,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2023-12-02 12:32:02,156 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 14 [2023-12-02 12:32:02,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:32:02,156 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2023-12-02 12:32:02,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:32:02,156 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2023-12-02 12:32:02,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 12:32:02,157 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:32:02,157 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:32:02,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 12:32:02,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:32:02,358 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:32:02,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:32:02,358 INFO L85 PathProgramCache]: Analyzing trace with hash -863189558, now seen corresponding path program 1 times [2023-12-02 12:32:02,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:32:02,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773380359] [2023-12-02 12:32:02,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:32:02,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:32:02,373 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:32:02,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1510988154] [2023-12-02 12:32:02,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:32:02,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:32:02,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:32:02,374 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:32:02,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 12:32:02,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:32:02,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-02 12:32:02,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:32:02,558 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:32:02,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:32:20,228 WARN L293 SmtUtils]: Spent 8.37s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:32:50,365 WARN L293 SmtUtils]: Spent 20.73s on a formula simplification. DAG size of input: 77 DAG size of output: 77 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:33:28,002 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse4 (* |c_ULTIMATE.start_gcd_test_~a#1| 2)) (.cse19 (+ |c_ULTIMATE.start_gcd_test_~b#1| 1))) (let ((.cse3 (* |c_ULTIMATE.start_gcd_test_~b#1| (- 3))) (.cse13 (* (- 2) |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse1 (* |c_ULTIMATE.start_gcd_test_~b#1| 8)) (.cse2 (* |c_ULTIMATE.start_gcd_test_~a#1| 5)) (.cse7 (* |c_ULTIMATE.start_gcd_test_~b#1| 4)) (.cse12 (* |c_ULTIMATE.start_gcd_test_~b#1| 3)) (.cse16 (* (- 1) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse0 (< |c_ULTIMATE.start_gcd_test_~a#1| .cse19)) (.cse6 (* (- 1) |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse15 (* |c_ULTIMATE.start_gcd_test_~a#1| 4)) (.cse10 (* 7 |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse11 (* (- 2) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse17 (< .cse4 .cse19)) (.cse5 (* |c_ULTIMATE.start_gcd_test_~b#1| 5)) (.cse18 (* |c_ULTIMATE.start_gcd_test_~a#1| 8)) (.cse14 (* 7 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse20 (* |c_ULTIMATE.start_gcd_test_~b#1| 2)) (.cse9 (* |c_ULTIMATE.start_gcd_test_~a#1| 3)) (.cse21 (* |c_ULTIMATE.start_gcd_test_~a#1| (- 3))) (.cse8 (< |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_gcd_test_~a#1|))) (and (or .cse0 (not (= .cse1 .cse2)) (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse3 .cse4)) 0)) (or .cse0 (= (mod |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (not (= |c_ULTIMATE.start_gcd_test_~a#1| .cse5))) (or (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse6)) 0) (not (= .cse7 .cse2)) .cse8 (= |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|)) (or .cse0 (not (= .cse9 .cse10)) (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse11)) 0)) (or (not (= .cse2 .cse10)) .cse0 (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse12 .cse13)) 0)) (or .cse0 (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse3)) 0) (not (= .cse4 .cse10))) (or (not (= .cse14 .cse12)) (= |c_ULTIMATE.start_gcd_test_~b#1| .cse4) (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse13)) 0) .cse8) (or .cse0 (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse12 .cse6)) 0) (not (= .cse1 .cse9))) (or .cse0 (not (= .cse5 .cse15)) (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse16)) 0)) (or (= (mod |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 0) (= |c_ULTIMATE.start_gcd_test_~a#1| 0) (not (= |c_ULTIMATE.start_gcd_test_~b#1| .cse2)) .cse8) (or (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse4 .cse16)) 0) .cse17 (not (= .cse14 .cse7))) (or (not (= .cse12 .cse18)) .cse8 (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse9 .cse16)) 0) (< .cse9 .cse19)) (or .cse0 (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse20 .cse6)) 0) (not (= .cse15 .cse10))) (or (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse11 .cse9)) 0) (not (= .cse14 .cse5)) .cse17) (or (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse21 .cse20)) 0) .cse17 (not (= .cse5 .cse18))) (or (not (= .cse14 .cse20)) (= |c_ULTIMATE.start_gcd_test_~b#1| .cse9) (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse21 |c_ULTIMATE.start_gcd_test_~b#1|)) 0) .cse8)))) is different from true [2023-12-02 12:37:37,017 WARN L293 SmtUtils]: Spent 2.23m on a formula simplification that was a NOOP. DAG size: 136 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:37:37,033 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-12-02 12:37:37,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:37:37,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773380359] [2023-12-02 12:37:37,033 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:37:37,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510988154] [2023-12-02 12:37:37,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510988154] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:37:37,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1372330056] [2023-12-02 12:37:37,035 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-12-02 12:37:37,035 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:37:37,035 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:37:37,035 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:37:37,036 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:37:37,304 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 80 for LOIs [2023-12-02 12:37:37,486 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:37:47,374 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1309#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (or (exists ((|v_ULTIMATE.start_gcd_test_#res#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main1_~g~0#1_BEFORE_CALL_11| Int)) (and (or (and (exists ((v___VERIFIER_assert_~cond_BEFORE_RETURN_2 Int)) (and (= v___VERIFIER_assert_~cond_BEFORE_RETURN_2 1) (= (mod 63 |v_ULTIMATE.start_main1_~g~0#1_BEFORE_CALL_11|) 0))) (= |v_ULTIMATE.start_gcd_test_#res#1_BEFORE_CALL_7| |v_ULTIMATE.start_main1_~g~0#1_BEFORE_CALL_11|)) (and (exists ((v___VERIFIER_assert_~cond_BEFORE_RETURN_1 Int)) (and (= (mod 63 |v_ULTIMATE.start_main1_~g~0#1_BEFORE_CALL_11|) 0) (= v___VERIFIER_assert_~cond_BEFORE_RETURN_1 1))) (= |v_ULTIMATE.start_gcd_test_#res#1_BEFORE_CALL_7| |v_ULTIMATE.start_main1_~g~0#1_BEFORE_CALL_11|))) (not (= (mod 18 |v_ULTIMATE.start_main1_~g~0#1_BEFORE_CALL_11|) 0)))) (exists ((|v_ULTIMATE.start_gcd_test_#res#1_BEFORE_CALL_8| Int)) (and (<= |v_ULTIMATE.start_gcd_test_#res#1_BEFORE_CALL_8| 2147483647) (<= 0 (+ |v_ULTIMATE.start_gcd_test_#res#1_BEFORE_CALL_8| 2147483648)) (not (= (mod 63 |v_ULTIMATE.start_gcd_test_#res#1_BEFORE_CALL_8|) 0))))))' at error location [2023-12-02 12:37:47,374 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:37:47,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:37:47,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2023-12-02 12:37:47,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655564870] [2023-12-02 12:37:47,374 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:37:47,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-02 12:37:47,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:37:47,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-02 12:37:47,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=862, Unknown=7, NotChecked=60, Total=1056 [2023-12-02 12:37:47,377 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 23 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 12:37:49,394 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 12:37:50,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 12:37:52,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 12:37:54,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Bool, Real, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 12:37:57,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 12:37:58,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 12:38:01,658 WARN L539 Checker$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 12:38:01,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:38:01,762 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2023-12-02 12:38:01,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 12:38:01,762 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-12-02 12:38:01,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:38:01,763 INFO L225 Difference]: With dead ends: 36 [2023-12-02 12:38:01,763 INFO L226 Difference]: Without dead ends: 18 [2023-12-02 12:38:01,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 195.4s TimeCoverageRelationStatistics Valid=151, Invalid=1036, Unknown=7, NotChecked=66, Total=1260 [2023-12-02 12:38:01,764 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 5 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2023-12-02 12:38:01,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 348 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 203 Invalid, 2 Unknown, 36 Unchecked, 13.6s Time] [2023-12-02 12:38:01,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-12-02 12:38:01,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-12-02 12:38:01,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 9 states have (on average 1.0) internal successors, (9), 9 states have internal predecessors, (9), 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 12:38:01,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2023-12-02 12:38:01,768 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 19 [2023-12-02 12:38:01,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:38:01,769 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2023-12-02 12:38:01,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 12:38:01,769 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2023-12-02 12:38:01,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 12:38:01,770 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:38:01,770 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:38:01,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 12:38:01,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:38:01,971 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:38:01,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:38:01,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1675771991, now seen corresponding path program 1 times [2023-12-02 12:38:01,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:38:01,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452982043] [2023-12-02 12:38:01,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:01,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:38:01,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 12:38:01,991 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 12:38:02,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 12:38:02,017 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 12:38:02,017 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 12:38:02,018 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-12-02 12:38:02,020 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-12-02 12:38:02,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 12:38:02,022 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1] [2023-12-02 12:38:02,025 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 12:38:02,035 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret7 could not be translated [2023-12-02 12:38:02,036 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret8 could not be translated [2023-12-02 12:38:02,036 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret7 could not be translated [2023-12-02 12:38:02,037 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret9 could not be translated [2023-12-02 12:38:02,037 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret9 could not be translated [2023-12-02 12:38:02,037 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret10 could not be translated [2023-12-02 12:38:02,037 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret11 could not be translated [2023-12-02 12:38:02,037 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret12 could not be translated [2023-12-02 12:38:02,038 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret11 could not be translated [2023-12-02 12:38:02,044 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 12:38:02 BoogieIcfgContainer [2023-12-02 12:38:02,044 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 12:38:02,044 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 12:38:02,044 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 12:38:02,045 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 12:38:02,045 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:28:36" (3/4) ... [2023-12-02 12:38:02,047 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-12-02 12:38:02,048 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 12:38:02,048 INFO L158 Benchmark]: Toolchain (without parser) took 566425.31ms. Allocated memory was 132.1MB in the beginning and 192.9MB in the end (delta: 60.8MB). Free memory was 96.8MB in the beginning and 158.4MB in the end (delta: -61.6MB). Peak memory consumption was 699.9kB. Max. memory is 16.1GB. [2023-12-02 12:38:02,048 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 132.1MB. Free memory is still 104.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 12:38:02,049 INFO L158 Benchmark]: CACSL2BoogieTranslator took 265.00ms. Allocated memory is still 132.1MB. Free memory was 96.8MB in the beginning and 85.1MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-12-02 12:38:02,049 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.30ms. Allocated memory is still 132.1MB. Free memory was 85.1MB in the beginning and 83.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 12:38:02,049 INFO L158 Benchmark]: Boogie Preprocessor took 20.97ms. Allocated memory is still 132.1MB. Free memory was 83.3MB in the beginning and 82.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 12:38:02,050 INFO L158 Benchmark]: RCFGBuilder took 341.57ms. Allocated memory is still 132.1MB. Free memory was 81.7MB in the beginning and 66.2MB in the end (delta: 15.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-12-02 12:38:02,050 INFO L158 Benchmark]: TraceAbstraction took 565756.22ms. Allocated memory was 132.1MB in the beginning and 192.9MB in the end (delta: 60.8MB). Free memory was 65.4MB in the beginning and 158.4MB in the end (delta: -93.0MB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 12:38:02,050 INFO L158 Benchmark]: Witness Printer took 3.67ms. Allocated memory is still 192.9MB. Free memory is still 158.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 12:38:02,052 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 132.1MB. Free memory is still 104.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 265.00ms. Allocated memory is still 132.1MB. Free memory was 96.8MB in the beginning and 85.1MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.30ms. Allocated memory is still 132.1MB. Free memory was 85.1MB in the beginning and 83.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.97ms. Allocated memory is still 132.1MB. Free memory was 83.3MB in the beginning and 82.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 341.57ms. Allocated memory is still 132.1MB. Free memory was 81.7MB in the beginning and 66.2MB in the end (delta: 15.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 565756.22ms. Allocated memory was 132.1MB in the beginning and 192.9MB in the end (delta: 60.8MB). Free memory was 65.4MB in the beginning and 158.4MB in the end (delta: -93.0MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 3.67ms. Allocated memory is still 192.9MB. Free memory is still 158.4MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret7 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret8 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret7 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret9 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret9 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret10 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret12 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret11 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 109]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 98, overapproximation of someBinaryDOUBLEComparisonOperation at line 108, overapproximation of someBinaryArithmeticFLOAToperation at line 104. Possible FailurePath: [L115] COND FALSE !(__VERIFIER_nondet_int()) [L118] CALL main2() [L97] float IN = __VERIFIER_nondet_float(); [L98] CALL assume_abort_if_not(IN > -0.4f && IN < 0.4f) [L82] COND FALSE !(!cond) [L98] RET assume_abort_if_not(IN > -0.4f && IN < 0.4f) [L100] CALL, EXPR f(IN) VAL [\old(x)=111] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; [L100] RET, EXPR f(IN) VAL [IN=111] [L100] CALL, EXPR fp(IN) VAL [\old(x)=111] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; [L100] RET, EXPR fp(IN) VAL [IN=111] [L100] float x = IN - f(IN)/fp(IN); [L102] CALL, EXPR f(x) VAL [\old(x)=112] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; [L102] RET, EXPR f(x) VAL [IN=111, x=112] [L102] CALL, EXPR fp(x) VAL [\old(x)=112] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; [L102] RET, EXPR fp(x) VAL [IN=111, x=112] [L102] x = x - f(x)/fp(x) [L104] CALL, EXPR f(x) VAL [\old(x)=115] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; [L104] RET, EXPR f(x) VAL [IN=111, x=115] [L104] CALL, EXPR fp(x) VAL [\old(x)=115] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; [L104] RET, EXPR fp(x) VAL [IN=111, x=115] [L104] x = x - f(x)/fp(x) [L108] COND TRUE !(x < 0.1) VAL [IN=111] [L109] reach_error() VAL [IN=111] - UnprovableResult [Line: 27]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 34 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 565.7s, OverallIterations: 8, TraceHistogramMax: 5, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 20.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 23 SdHoareTripleChecker+Valid, 14.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 23 mSDsluCounter, 1201 SdHoareTripleChecker+Invalid, 14.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 133 IncrementalHoareTripleChecker+Unchecked, 1011 mSDsCounter, 24 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 529 IncrementalHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 24 mSolverCounterUnsat, 190 mSDtfsCounter, 529 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 225 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 239.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=5, InterpolantAutomatonStates: 58, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 528.8s InterpolantComputationTime, 118 NumberOfCodeBlocks, 118 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 141 ConstructedInterpolants, 0 QuantifiedInterpolants, 3084 SizeOfPredicates, 33 NumberOfNonLiveVariables, 520 ConjunctsInSsa, 107 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 4/98 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-12-02 12:38:02,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/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_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_4+newton_3_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/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 19e5e10e8b882a2339014fe22e262bc9b50fc611ccb496d82df2ea8022cd18a7 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 12:38:03,930 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 12:38:04,004 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2023-12-02 12:38:04,009 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 12:38:04,010 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 12:38:04,035 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 12:38:04,036 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 12:38:04,036 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 12:38:04,037 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 12:38:04,038 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 12:38:04,038 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 12:38:04,039 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 12:38:04,039 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 12:38:04,039 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 12:38:04,040 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 12:38:04,041 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 12:38:04,041 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 12:38:04,042 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 12:38:04,043 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 12:38:04,043 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 12:38:04,044 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 12:38:04,044 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 12:38:04,045 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 12:38:04,045 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 12:38:04,046 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 12:38:04,046 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-02 12:38:04,046 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-02 12:38:04,047 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 12:38:04,047 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 12:38:04,047 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 12:38:04,048 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 12:38:04,048 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-02 12:38:04,048 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 12:38:04,049 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 12:38:04,049 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:38:04,049 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 12:38:04,050 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 12:38:04,050 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 12:38:04,050 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-12-02 12:38:04,050 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-02 12:38:04,050 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 12:38:04,051 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 12:38:04,051 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 12:38:04,051 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 12:38:04,051 INFO L153 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 19e5e10e8b882a2339014fe22e262bc9b50fc611ccb496d82df2ea8022cd18a7 [2023-12-02 12:38:04,339 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 12:38:04,359 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 12:38:04,361 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 12:38:04,362 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 12:38:04,363 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 12:38:04,364 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/combinations/gcd_4+newton_3_2.i [2023-12-02 12:38:07,119 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 12:38:07,321 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 12:38:07,322 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/sv-benchmarks/c/combinations/gcd_4+newton_3_2.i [2023-12-02 12:38:07,330 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/data/d23f90625/3210ce6544a945de8a79059b549252aa/FLAG9b212532a [2023-12-02 12:38:07,345 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/data/d23f90625/3210ce6544a945de8a79059b549252aa [2023-12-02 12:38:07,348 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 12:38:07,350 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 12:38:07,351 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 12:38:07,351 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 12:38:07,356 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 12:38:07,357 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:38:07" (1/1) ... [2023-12-02 12:38:07,358 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73625762 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:07, skipping insertion in model container [2023-12-02 12:38:07,359 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:38:07" (1/1) ... [2023-12-02 12:38:07,383 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 12:38:07,544 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_c81e2b6d-147e-4a68-b7f8-38522eff12ce/sv-benchmarks/c/combinations/gcd_4+newton_3_2.i[1224,1237] [2023-12-02 12:38:07,570 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_c81e2b6d-147e-4a68-b7f8-38522eff12ce/sv-benchmarks/c/combinations/gcd_4+newton_3_2.i[2848,2861] [2023-12-02 12:38:07,572 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:38:07,589 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 12:38:07,603 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_c81e2b6d-147e-4a68-b7f8-38522eff12ce/sv-benchmarks/c/combinations/gcd_4+newton_3_2.i[1224,1237] [2023-12-02 12:38:07,615 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_c81e2b6d-147e-4a68-b7f8-38522eff12ce/sv-benchmarks/c/combinations/gcd_4+newton_3_2.i[2848,2861] [2023-12-02 12:38:07,616 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:38:07,634 INFO L206 MainTranslator]: Completed translation [2023-12-02 12:38:07,635 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:07 WrapperNode [2023-12-02 12:38:07,635 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 12:38:07,636 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 12:38:07,636 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 12:38:07,637 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 12:38:07,644 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:07" (1/1) ... [2023-12-02 12:38:07,655 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:07" (1/1) ... [2023-12-02 12:38:07,676 INFO L138 Inliner]: procedures = 28, calls = 28, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 83 [2023-12-02 12:38:07,677 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 12:38:07,677 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 12:38:07,678 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 12:38:07,678 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 12:38:07,686 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:07" (1/1) ... [2023-12-02 12:38:07,687 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:07" (1/1) ... [2023-12-02 12:38:07,691 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:07" (1/1) ... [2023-12-02 12:38:07,691 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:07" (1/1) ... [2023-12-02 12:38:07,700 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:07" (1/1) ... [2023-12-02 12:38:07,704 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:07" (1/1) ... [2023-12-02 12:38:07,706 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:07" (1/1) ... [2023-12-02 12:38:07,708 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:07" (1/1) ... [2023-12-02 12:38:07,712 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 12:38:07,713 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 12:38:07,713 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 12:38:07,714 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 12:38:07,714 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:07" (1/1) ... [2023-12-02 12:38:07,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:38:07,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:38:07,746 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 12:38:07,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 12:38:07,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 12:38:07,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-12-02 12:38:07,785 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2023-12-02 12:38:07,785 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2023-12-02 12:38:07,786 INFO L130 BoogieDeclarations]: Found specification of procedure f [2023-12-02 12:38:07,786 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2023-12-02 12:38:07,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 12:38:07,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 12:38:07,786 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 12:38:07,787 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 12:38:07,873 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 12:38:07,875 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 12:38:18,184 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 12:38:18,211 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 12:38:18,211 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 12:38:18,212 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:38:18 BoogieIcfgContainer [2023-12-02 12:38:18,212 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 12:38:18,215 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 12:38:18,216 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 12:38:18,219 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 12:38:18,220 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:38:07" (1/3) ... [2023-12-02 12:38:18,220 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54f73f9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:38:18, skipping insertion in model container [2023-12-02 12:38:18,221 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:07" (2/3) ... [2023-12-02 12:38:18,221 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54f73f9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:38:18, skipping insertion in model container [2023-12-02 12:38:18,222 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:38:18" (3/3) ... [2023-12-02 12:38:18,223 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_3_2.i [2023-12-02 12:38:18,243 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 12:38:18,244 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-02 12:38:18,289 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 12:38:18,296 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;@1b37403a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 12:38:18,296 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-02 12:38:18,301 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 27 states have internal predecessors, (37), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 12:38:18,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 12:38:18,309 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:38:18,309 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:38:18,310 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:38:18,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:38:18,315 INFO L85 PathProgramCache]: Analyzing trace with hash -843708153, now seen corresponding path program 1 times [2023-12-02 12:38:18,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:38:18,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1912238991] [2023-12-02 12:38:18,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:18,328 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 12:38:18,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:38:18,331 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 12:38:18,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-12-02 12:38:18,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:18,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 12:38:18,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:38:18,504 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 12:38:18,505 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:38:18,505 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:38:18,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1912238991] [2023-12-02 12:38:18,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1912238991] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:38:18,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:38:18,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:38:18,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767115269] [2023-12-02 12:38:18,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:38:18,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:38:18,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:38:18,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:38:18,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:38:18,548 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 27 states have internal predecessors, (37), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:38:21,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.28s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 12:38:23,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 12:38:27,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.86s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 12:38:29,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 12:38:29,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:38:29,432 INFO L93 Difference]: Finished difference Result 80 states and 113 transitions. [2023-12-02 12:38:29,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:38:29,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-02 12:38:29,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:38:29,442 INFO L225 Difference]: With dead ends: 80 [2023-12-02 12:38:29,442 INFO L226 Difference]: Without dead ends: 40 [2023-12-02 12:38:29,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 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 12:38:29,448 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2023-12-02 12:38:29,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 72 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 4 Unknown, 0 Unchecked, 10.8s Time] [2023-12-02 12:38:29,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-12-02 12:38:29,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2023-12-02 12:38:29,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 24 states have internal predecessors, (27), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 12:38:29,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2023-12-02 12:38:29,494 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 10 [2023-12-02 12:38:29,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:38:29,495 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2023-12-02 12:38:29,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:38:29,496 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2023-12-02 12:38:29,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 12:38:29,497 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:38:29,497 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:38:29,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-12-02 12:38:29,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 12:38:29,699 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:38:29,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:38:29,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1380841513, now seen corresponding path program 1 times [2023-12-02 12:38:29,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:38:29,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1396620419] [2023-12-02 12:38:29,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:29,700 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 12:38:29,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:38:29,702 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 12:38:29,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-12-02 12:38:29,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:29,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 12:38:29,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:38:29,839 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 12:38:29,839 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:38:29,839 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:38:29,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1396620419] [2023-12-02 12:38:29,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1396620419] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:38:29,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:38:29,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:38:29,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574962612] [2023-12-02 12:38:29,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:38:29,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:38:29,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:38:29,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:38:29,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:38:29,845 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:38:33,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 12:38:35,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 12:38:38,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.83s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 12:38:40,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 12:38:40,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:38:40,524 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2023-12-02 12:38:40,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:38:40,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-02 12:38:40,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:38:40,526 INFO L225 Difference]: With dead ends: 52 [2023-12-02 12:38:40,527 INFO L226 Difference]: Without dead ends: 38 [2023-12-02 12:38:40,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 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 12:38:40,529 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 4 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2023-12-02 12:38:40,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 67 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 4 Unknown, 0 Unchecked, 10.7s Time] [2023-12-02 12:38:40,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-02 12:38:40,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-12-02 12:38:40,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 12:38:40,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2023-12-02 12:38:40,540 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 12 [2023-12-02 12:38:40,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:38:40,540 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2023-12-02 12:38:40,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:38:40,541 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2023-12-02 12:38:40,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 12:38:40,542 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:38:40,542 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:38:40,546 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-12-02 12:38:40,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 12:38:40,743 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:38:40,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:38:40,744 INFO L85 PathProgramCache]: Analyzing trace with hash 289454548, now seen corresponding path program 1 times [2023-12-02 12:38:40,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:38:40,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [162288765] [2023-12-02 12:38:40,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:40,745 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 12:38:40,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:38:40,746 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 12:38:40,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-12-02 12:38:40,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:40,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 12:38:40,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:38:41,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:38:41,049 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:38:41,049 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:38:41,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [162288765] [2023-12-02 12:38:41,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [162288765] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:38:41,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:38:41,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:38:41,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041881988] [2023-12-02 12:38:41,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:38:41,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:38:41,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:38:41,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:38:41,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:38:41,052 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:38:44,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.21s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 12:38:46,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 12:38:49,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.85s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 12:38:51,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 12:38:51,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:38:51,781 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2023-12-02 12:38:51,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:38:51,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-02 12:38:51,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:38:51,783 INFO L225 Difference]: With dead ends: 53 [2023-12-02 12:38:51,783 INFO L226 Difference]: Without dead ends: 40 [2023-12-02 12:38:51,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 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 12:38:51,786 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2023-12-02 12:38:51,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 65 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 4 Unknown, 0 Unchecked, 10.7s Time] [2023-12-02 12:38:51,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-12-02 12:38:51,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-12-02 12:38:51,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 12:38:51,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2023-12-02 12:38:51,796 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 14 [2023-12-02 12:38:51,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:38:51,797 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2023-12-02 12:38:51,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:38:51,798 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2023-12-02 12:38:51,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 12:38:51,799 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:38:51,799 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:38:51,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-12-02 12:38:51,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 12:38:52,000 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:38:52,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:38:52,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1181837103, now seen corresponding path program 1 times [2023-12-02 12:38:52,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:38:52,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1893475298] [2023-12-02 12:38:52,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:52,001 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 12:38:52,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:38:52,002 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 12:38:52,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-12-02 12:38:52,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:52,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 12:38:52,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:38:52,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:38:52,382 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:38:52,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:38:52,611 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:38:52,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1893475298] [2023-12-02 12:38:52,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1893475298] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:38:52,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1543826554] [2023-12-02 12:38:52,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:52,613 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:38:52,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:38:52,615 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:38:52,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2023-12-02 12:38:52,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:52,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 12:38:52,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:38:52,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:38:52,956 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:38:53,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:38:53,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1543826554] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:38:53,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66535343] [2023-12-02 12:38:53,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:53,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:38:53,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:38:53,069 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:38:53,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 12:38:53,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:53,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 12:38:53,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:38:53,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:38:53,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:38:53,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:38:53,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66535343] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:38:53,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:38:53,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 5, 5] total 10 [2023-12-02 12:38:53,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175335512] [2023-12-02 12:38:53,771 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:38:53,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 12:38:53,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:38:53,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 12:38:53,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-02 12:38:53,773 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:38:57,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 12:38:59,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 12:39:01,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 12:39:03,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 12:39:05,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 12:39:07,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 12:39:09,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 12:39:11,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 12:39:13,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 12:39:16,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.83s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 12:39:18,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 12:39:20,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 12:39:22,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 12:39:24,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 12:39:26,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 12:39:28,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 12:39:30,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 12:39:32,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 12:39:32,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:39:32,969 INFO L93 Difference]: Finished difference Result 60 states and 75 transitions. [2023-12-02 12:39:32,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 12:39:32,970 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-12-02 12:39:32,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:39:32,971 INFO L225 Difference]: With dead ends: 60 [2023-12-02 12:39:32,971 INFO L226 Difference]: Without dead ends: 47 [2023-12-02 12:39:32,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-12-02 12:39:32,973 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 7 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:39:32,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 155 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 18 Unknown, 0 Unchecked, 39.0s Time] [2023-12-02 12:39:32,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-12-02 12:39:32,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2023-12-02 12:39:32,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 33 states have internal predecessors, (36), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 12:39:32,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2023-12-02 12:39:32,983 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 16 [2023-12-02 12:39:32,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:39:32,983 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2023-12-02 12:39:32,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:39:32,983 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2023-12-02 12:39:32,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 12:39:32,985 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:39:32,985 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:39:32,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-12-02 12:39:33,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-02 12:39:33,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2023-12-02 12:39:33,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 12:39:33,586 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:39:33,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:39:33,586 INFO L85 PathProgramCache]: Analyzing trace with hash -2091413279, now seen corresponding path program 1 times [2023-12-02 12:39:33,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:39:33,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [925718613] [2023-12-02 12:39:33,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:39:33,587 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 12:39:33,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:39:33,588 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 12:39:33,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c81e2b6d-147e-4a68-b7f8-38522eff12ce/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process