./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-nla/lcm1-both-nt.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d33ca5a1-da94-49fc-bf51-47e779cdd55c/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d33ca5a1-da94-49fc-bf51-47e779cdd55c/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d33ca5a1-da94-49fc-bf51-47e779cdd55c/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d33ca5a1-da94-49fc-bf51-47e779cdd55c/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-nla/lcm1-both-nt.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d33ca5a1-da94-49fc-bf51-47e779cdd55c/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d33ca5a1-da94-49fc-bf51-47e779cdd55c/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash de9b23e071ad28ec3471a6df711a8ce6d488c1e0c4f71c188ed8181e503af494 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:25:15,204 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:25:15,318 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d33ca5a1-da94-49fc-bf51-47e779cdd55c/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Termination-32bit-Automizer_Default.epf [2023-11-12 02:25:15,324 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:25:15,325 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:25:15,364 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:25:15,365 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:25:15,366 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:25:15,367 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:25:15,372 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:25:15,373 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:25:15,373 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2023-11-12 02:25:15,374 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2023-11-12 02:25:15,375 INFO L153 SettingsManager]: * Use old map elimination=false [2023-11-12 02:25:15,376 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2023-11-12 02:25:15,376 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2023-11-12 02:25:15,376 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2023-11-12 02:25:15,377 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:25:15,378 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2023-11-12 02:25:15,378 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:25:15,378 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:25:15,379 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:25:15,379 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:25:15,380 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2023-11-12 02:25:15,380 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2023-11-12 02:25:15,381 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2023-11-12 02:25:15,382 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:25:15,383 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:25:15,383 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:25:15,383 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2023-11-12 02:25:15,385 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:25:15,385 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:25:15,385 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:25:15,386 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:25:15,386 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:25:15,386 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2023-11-12 02:25:15,387 INFO L153 SettingsManager]: * TransformationType=MODULO_NEIGHBOR 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_d33ca5a1-da94-49fc-bf51-47e779cdd55c/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d33ca5a1-da94-49fc-bf51-47e779cdd55c/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de9b23e071ad28ec3471a6df711a8ce6d488c1e0c4f71c188ed8181e503af494 [2023-11-12 02:25:15,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:25:15,731 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:25:15,734 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:25:15,736 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:25:15,736 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:25:15,738 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d33ca5a1-da94-49fc-bf51-47e779cdd55c/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/termination-nla/lcm1-both-nt.c [2023-11-12 02:25:18,775 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:25:18,996 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:25:18,996 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d33ca5a1-da94-49fc-bf51-47e779cdd55c/sv-benchmarks/c/termination-nla/lcm1-both-nt.c [2023-11-12 02:25:19,005 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d33ca5a1-da94-49fc-bf51-47e779cdd55c/bin/uautomizer-verify-uTZkv6EMXl/data/5ebc1f5c1/2fa96e3d625a4935860c63bed15fe0f4/FLAGff56f3bd5 [2023-11-12 02:25:19,030 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d33ca5a1-da94-49fc-bf51-47e779cdd55c/bin/uautomizer-verify-uTZkv6EMXl/data/5ebc1f5c1/2fa96e3d625a4935860c63bed15fe0f4 [2023-11-12 02:25:19,032 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:25:19,034 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:25:19,036 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:25:19,036 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:25:19,043 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:25:19,044 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:25:19" (1/1) ... [2023-11-12 02:25:19,045 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@460d280a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:19, skipping insertion in model container [2023-11-12 02:25:19,046 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:25:19" (1/1) ... [2023-11-12 02:25:19,075 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:25:19,222 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:25:19,226 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:25:19,241 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:25:19,248 WARN L672 CHandler]: The function __VERIFIER_nondet_unsigned_int is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:25:19,256 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:25:19,257 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:19 WrapperNode [2023-11-12 02:25:19,257 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:25:19,258 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:25:19,258 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:25:19,259 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:25:19,266 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:19" (1/1) ... [2023-11-12 02:25:19,271 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:19" (1/1) ... [2023-11-12 02:25:19,290 INFO L138 Inliner]: procedures = 4, calls = 4, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 45 [2023-11-12 02:25:19,290 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:25:19,291 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:25:19,291 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:25:19,291 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:25:19,300 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:19" (1/1) ... [2023-11-12 02:25:19,300 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:19" (1/1) ... [2023-11-12 02:25:19,301 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:19" (1/1) ... [2023-11-12 02:25:19,302 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:19" (1/1) ... [2023-11-12 02:25:19,304 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:19" (1/1) ... [2023-11-12 02:25:19,315 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:19" (1/1) ... [2023-11-12 02:25:19,320 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:19" (1/1) ... [2023-11-12 02:25:19,321 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:19" (1/1) ... [2023-11-12 02:25:19,324 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:25:19,326 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:25:19,326 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:25:19,327 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:25:19,328 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:19" (1/1) ... [2023-11-12 02:25:19,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-12 02:25:19,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d33ca5a1-da94-49fc-bf51-47e779cdd55c/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:25:19,362 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d33ca5a1-da94-49fc-bf51-47e779cdd55c/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-12 02:25:19,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d33ca5a1-da94-49fc-bf51-47e779cdd55c/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2023-11-12 02:25:19,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:25:19,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:25:19,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2023-11-12 02:25:19,477 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:25:19,481 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:25:19,731 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:25:19,737 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:25:19,738 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-12 02:25:19,740 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:25:19 BoogieIcfgContainer [2023-11-12 02:25:19,740 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:25:19,741 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2023-11-12 02:25:19,741 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2023-11-12 02:25:19,753 INFO L274 PluginConnector]: BuchiAutomizer initialized [2023-11-12 02:25:19,754 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-12 02:25:19,754 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 12.11 02:25:19" (1/3) ... [2023-11-12 02:25:19,755 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@10a4f681 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 12.11 02:25:19, skipping insertion in model container [2023-11-12 02:25:19,756 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-12 02:25:19,756 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:19" (2/3) ... [2023-11-12 02:25:19,756 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@10a4f681 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 12.11 02:25:19, skipping insertion in model container [2023-11-12 02:25:19,756 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-12 02:25:19,757 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:25:19" (3/3) ... [2023-11-12 02:25:19,758 INFO L332 chiAutomizerObserver]: Analyzing ICFG lcm1-both-nt.c [2023-11-12 02:25:19,826 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2023-11-12 02:25:19,826 INFO L304 stractBuchiCegarLoop]: Hoare is false [2023-11-12 02:25:19,826 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2023-11-12 02:25:19,826 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2023-11-12 02:25:19,827 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2023-11-12 02:25:19,827 INFO L308 stractBuchiCegarLoop]: Difference is false [2023-11-12 02:25:19,827 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2023-11-12 02:25:19,827 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2023-11-12 02:25:19,832 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:19,851 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2023-11-12 02:25:19,851 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-12 02:25:19,851 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-12 02:25:19,857 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-11-12 02:25:19,857 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2023-11-12 02:25:19,857 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2023-11-12 02:25:19,858 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:19,859 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2023-11-12 02:25:19,859 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-12 02:25:19,860 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-12 02:25:19,860 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-11-12 02:25:19,860 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2023-11-12 02:25:19,868 INFO L748 eck$LassoCheckResult]: Stem: 11#$Ultimate##0true assume { :begin_inline_ULTIMATE.init } true; 5#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret0#1, main_#t~ret1#1, main_~a~0#1, main_~b~0#1, main_~x~0#1, main_~y~0#1, main_~u~0#1, main_~v~0#1;havoc main_~a~0#1;havoc main_~b~0#1;havoc main_~x~0#1;havoc main_~y~0#1;havoc main_~u~0#1;havoc main_~v~0#1;call main_#t~ret0#1 := __VERIFIER_nondet_unsigned_int();main_~a~0#1 := main_#t~ret0#1;havoc main_#t~ret0#1;call main_#t~ret1#1 := __VERIFIER_nondet_unsigned_int();main_~b~0#1 := main_#t~ret1#1;havoc main_#t~ret1#1; 4#L33true assume !(((main_~a~0#1 % 4294967296 < 1 || main_~b~0#1 % 4294967296 < 1) || main_~a~0#1 % 4294967296 > 65535) || main_~b~0#1 % 4294967296 > 65535);main_~x~0#1 := main_~a~0#1;main_~y~0#1 := main_~b~0#1;main_~u~0#1 := main_~b~0#1;main_~v~0#1 := 0; 9#L55-2true [2023-11-12 02:25:19,868 INFO L750 eck$LassoCheckResult]: Loop: 9#L55-2true assume !false; 3#L44true assume !!((main_~x~0#1 * main_~u~0#1 + main_~y~0#1 * main_~v~0#1) % 4294967296 == main_~a~0#1 * main_~b~0#1 % 4294967296); 12#L47-2true assume !true; 6#L55-1true assume !true; 9#L55-2true [2023-11-12 02:25:19,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:25:19,876 INFO L85 PathProgramCache]: Analyzing trace with hash 29860, now seen corresponding path program 1 times [2023-11-12 02:25:19,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:25:19,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780102634] [2023-11-12 02:25:19,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:19,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:25:20,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:25:20,045 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:25:20,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:25:20,077 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:25:20,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:25:20,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1421558, now seen corresponding path program 1 times [2023-11-12 02:25:20,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:25:20,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532248859] [2023-11-12 02:25:20,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:20,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:25:20,090 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:25:20,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [522163361] [2023-11-12 02:25:20,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:20,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:20,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d33ca5a1-da94-49fc-bf51-47e779cdd55c/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:25:20,095 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d33ca5a1-da94-49fc-bf51-47e779cdd55c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:25:20,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d33ca5a1-da94-49fc-bf51-47e779cdd55c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:25:20,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:25:20,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 02:25:20,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:25:20,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:25:20,190 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:25:20,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:25:20,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532248859] [2023-11-12 02:25:20,191 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:25:20,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522163361] [2023-11-12 02:25:20,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522163361] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:25:20,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:25:20,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:25:20,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178615178] [2023-11-12 02:25:20,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:25:20,200 INFO L765 eck$LassoCheckResult]: loop already infeasible [2023-11-12 02:25:20,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:25:20,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:25:20,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:25:20,249 INFO L87 Difference]: Start difference. First operand has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:20,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:25:20,257 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2023-11-12 02:25:20,258 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 16 transitions. [2023-11-12 02:25:20,259 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2023-11-12 02:25:20,263 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 9 states and 11 transitions. [2023-11-12 02:25:20,264 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2023-11-12 02:25:20,265 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2023-11-12 02:25:20,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 11 transitions. [2023-11-12 02:25:20,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:25:20,266 INFO L218 hiAutomatonCegarLoop]: Abstraction has 9 states and 11 transitions. [2023-11-12 02:25:20,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 11 transitions. [2023-11-12 02:25:20,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2023-11-12 02:25:20,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:20,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2023-11-12 02:25:20,301 INFO L240 hiAutomatonCegarLoop]: Abstraction has 9 states and 11 transitions. [2023-11-12 02:25:20,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:25:20,309 INFO L428 stractBuchiCegarLoop]: Abstraction has 9 states and 11 transitions. [2023-11-12 02:25:20,309 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2023-11-12 02:25:20,310 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 9 states and 11 transitions. [2023-11-12 02:25:20,310 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2023-11-12 02:25:20,310 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-12 02:25:20,311 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-12 02:25:20,312 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-11-12 02:25:20,312 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2023-11-12 02:25:20,313 INFO L748 eck$LassoCheckResult]: Stem: 49#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 50#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret0#1, main_#t~ret1#1, main_~a~0#1, main_~b~0#1, main_~x~0#1, main_~y~0#1, main_~u~0#1, main_~v~0#1;havoc main_~a~0#1;havoc main_~b~0#1;havoc main_~x~0#1;havoc main_~y~0#1;havoc main_~u~0#1;havoc main_~v~0#1;call main_#t~ret0#1 := __VERIFIER_nondet_unsigned_int();main_~a~0#1 := main_#t~ret0#1;havoc main_#t~ret0#1;call main_#t~ret1#1 := __VERIFIER_nondet_unsigned_int();main_~b~0#1 := main_#t~ret1#1;havoc main_#t~ret1#1; 51#L33 assume !(((main_~a~0#1 % 4294967296 < 1 || main_~b~0#1 % 4294967296 < 1) || main_~a~0#1 % 4294967296 > 65535) || main_~b~0#1 % 4294967296 > 65535);main_~x~0#1 := main_~a~0#1;main_~y~0#1 := main_~b~0#1;main_~u~0#1 := main_~b~0#1;main_~v~0#1 := 0; 48#L55-2 [2023-11-12 02:25:20,313 INFO L750 eck$LassoCheckResult]: Loop: 48#L55-2 assume !false; 45#L44 assume !!((main_~x~0#1 * main_~u~0#1 + main_~y~0#1 * main_~v~0#1) % 4294967296 == main_~a~0#1 * main_~b~0#1 % 4294967296); 46#L47-2 assume !false; 47#L49 assume !((main_~x~0#1 * main_~u~0#1 + main_~y~0#1 * main_~v~0#1) % 4294967296 == main_~a~0#1 * main_~b~0#1 % 4294967296); 43#L55-1 assume !false; 44#L57 assume !((main_~x~0#1 * main_~u~0#1 + main_~y~0#1 * main_~v~0#1) % 4294967296 == main_~a~0#1 * main_~b~0#1 % 4294967296); 48#L55-2 [2023-11-12 02:25:20,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:25:20,314 INFO L85 PathProgramCache]: Analyzing trace with hash 29860, now seen corresponding path program 2 times [2023-11-12 02:25:20,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:25:20,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979494472] [2023-11-12 02:25:20,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:20,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:25:20,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:25:20,350 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:25:20,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:25:20,373 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:25:20,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:25:20,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1365890956, now seen corresponding path program 1 times [2023-11-12 02:25:20,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:25:20,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597314013] [2023-11-12 02:25:20,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:20,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:25:20,389 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:25:20,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2083515285] [2023-11-12 02:25:20,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:20,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:20,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d33ca5a1-da94-49fc-bf51-47e779cdd55c/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:25:20,442 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d33ca5a1-da94-49fc-bf51-47e779cdd55c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:25:20,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d33ca5a1-da94-49fc-bf51-47e779cdd55c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:25:20,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:25:20,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:25:20,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:25:20,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:25:20,584 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:25:20,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:25:20,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597314013] [2023-11-12 02:25:20,585 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:25:20,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083515285] [2023-11-12 02:25:20,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083515285] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:25:20,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:25:20,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:25:20,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187974947] [2023-11-12 02:25:20,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:25:20,588 INFO L765 eck$LassoCheckResult]: loop already infeasible [2023-11-12 02:25:20,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:25:20,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:25:20,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:25:20,589 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. cyclomatic complexity: 3 Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:32,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 12.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-12 02:25:44,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 12.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-12 02:25:56,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 12.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-12 02:25:56,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:25:56,802 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2023-11-12 02:25:56,802 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 15 transitions. [2023-11-12 02:25:56,803 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2023-11-12 02:25:56,804 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 13 states and 15 transitions. [2023-11-12 02:25:56,804 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2023-11-12 02:25:56,805 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 13 [2023-11-12 02:25:56,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 15 transitions. [2023-11-12 02:25:56,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:25:56,805 INFO L218 hiAutomatonCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-11-12 02:25:56,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 15 transitions. [2023-11-12 02:25:56,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2023-11-12 02:25:56,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:56,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2023-11-12 02:25:56,808 INFO L240 hiAutomatonCegarLoop]: Abstraction has 11 states and 13 transitions. [2023-11-12 02:25:56,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:25:56,819 INFO L428 stractBuchiCegarLoop]: Abstraction has 11 states and 13 transitions. [2023-11-12 02:25:56,820 INFO L335 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2023-11-12 02:25:56,820 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states and 13 transitions. [2023-11-12 02:25:56,820 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2023-11-12 02:25:56,821 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-12 02:25:56,821 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-12 02:25:56,821 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-11-12 02:25:56,821 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-12 02:25:56,822 INFO L748 eck$LassoCheckResult]: Stem: 93#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 94#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret0#1, main_#t~ret1#1, main_~a~0#1, main_~b~0#1, main_~x~0#1, main_~y~0#1, main_~u~0#1, main_~v~0#1;havoc main_~a~0#1;havoc main_~b~0#1;havoc main_~x~0#1;havoc main_~y~0#1;havoc main_~u~0#1;havoc main_~v~0#1;call main_#t~ret0#1 := __VERIFIER_nondet_unsigned_int();main_~a~0#1 := main_#t~ret0#1;havoc main_#t~ret0#1;call main_#t~ret1#1 := __VERIFIER_nondet_unsigned_int();main_~b~0#1 := main_#t~ret1#1;havoc main_#t~ret1#1; 95#L33 assume !(((main_~a~0#1 % 4294967296 < 1 || main_~b~0#1 % 4294967296 < 1) || main_~a~0#1 % 4294967296 > 65535) || main_~b~0#1 % 4294967296 > 65535);main_~x~0#1 := main_~a~0#1;main_~y~0#1 := main_~b~0#1;main_~u~0#1 := main_~b~0#1;main_~v~0#1 := 0; 92#L55-2 [2023-11-12 02:25:56,822 INFO L750 eck$LassoCheckResult]: Loop: 92#L55-2 assume !false; 88#L44 assume !!((main_~x~0#1 * main_~u~0#1 + main_~y~0#1 * main_~v~0#1) % 4294967296 == main_~a~0#1 * main_~b~0#1 % 4294967296); 89#L47-2 assume !false; 90#L49 assume !!((main_~x~0#1 * main_~u~0#1 + main_~y~0#1 * main_~v~0#1) % 4294967296 == main_~a~0#1 * main_~b~0#1 % 4294967296);main_~x~0#1 := main_~x~0#1 - main_~y~0#1;main_~v~0#1 := main_~v~0#1 + main_~u~0#1; 91#L47-2 assume !false; 96#L49 assume !((main_~x~0#1 * main_~u~0#1 + main_~y~0#1 * main_~v~0#1) % 4294967296 == main_~a~0#1 * main_~b~0#1 % 4294967296); 86#L55-1 assume !false; 87#L57 assume !((main_~x~0#1 * main_~u~0#1 + main_~y~0#1 * main_~v~0#1) % 4294967296 == main_~a~0#1 * main_~b~0#1 % 4294967296); 92#L55-2 [2023-11-12 02:25:56,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:25:56,823 INFO L85 PathProgramCache]: Analyzing trace with hash 29860, now seen corresponding path program 3 times [2023-11-12 02:25:56,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:25:56,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326554416] [2023-11-12 02:25:56,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:56,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:25:56,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:25:56,835 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:25:56,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:25:56,847 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:25:56,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:25:56,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1637427375, now seen corresponding path program 1 times [2023-11-12 02:25:56,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:25:56,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415431067] [2023-11-12 02:25:56,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:56,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:25:56,863 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:25:56,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [200185092] [2023-11-12 02:25:56,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:56,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:56,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d33ca5a1-da94-49fc-bf51-47e779cdd55c/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:25:56,875 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d33ca5a1-da94-49fc-bf51-47e779cdd55c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:25:56,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d33ca5a1-da94-49fc-bf51-47e779cdd55c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process