./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_2+newton_3_6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_024a5232-40fa-41ca-a374-cc58aaaa6d0a/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a5232-40fa-41ca-a374-cc58aaaa6d0a/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a5232-40fa-41ca-a374-cc58aaaa6d0a/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a5232-40fa-41ca-a374-cc58aaaa6d0a/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_2+newton_3_6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a5232-40fa-41ca-a374-cc58aaaa6d0a/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a5232-40fa-41ca-a374-cc58aaaa6d0a/bin/uautomizer-verify-4GaUIPS5ZU --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e2dd5d34f88ad6d47e063e6c09c7fec2ff27fac96724824e4298e1c863fcdc4b --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:19:01,049 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:19:01,168 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a5232-40fa-41ca-a374-cc58aaaa6d0a/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 22:19:01,176 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:19:01,177 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:19:01,224 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:19:01,226 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:19:01,227 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:19:01,228 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:19:01,229 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:19:01,230 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:19:01,231 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:19:01,232 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:19:01,234 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:19:01,235 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:19:01,235 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:19:01,236 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 22:19:01,238 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:19:01,239 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:19:01,239 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:19:01,240 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:19:01,240 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 22:19:01,241 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:19:01,241 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 22:19:01,245 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:19:01,246 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:19:01,246 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 22:19:01,246 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:19:01,247 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:19:01,247 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:19:01,248 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:19:01,248 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:19:01,248 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:19:01,249 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:19:01,249 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:19:01,249 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 22:19:01,249 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:19:01,250 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:19:01,250 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:19:01,250 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:19:01,251 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:19:01,253 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:19:01,254 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_024a5232-40fa-41ca-a374-cc58aaaa6d0a/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a5232-40fa-41ca-a374-cc58aaaa6d0a/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e2dd5d34f88ad6d47e063e6c09c7fec2ff27fac96724824e4298e1c863fcdc4b [2024-10-31 22:19:01,579 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:19:01,600 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:19:01,603 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:19:01,605 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:19:01,606 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:19:01,608 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a5232-40fa-41ca-a374-cc58aaaa6d0a/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/combinations/gcd_2+newton_3_6.i Unable to find full path for "g++" [2024-10-31 22:19:03,759 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:19:03,957 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:19:03,958 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a5232-40fa-41ca-a374-cc58aaaa6d0a/sv-benchmarks/c/combinations/gcd_2+newton_3_6.i [2024-10-31 22:19:03,968 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a5232-40fa-41ca-a374-cc58aaaa6d0a/bin/uautomizer-verify-4GaUIPS5ZU/data/3a730aad9/4beac026c8f4494daa1d8351a3ab73cf/FLAG12fd628a3 [2024-10-31 22:19:03,990 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a5232-40fa-41ca-a374-cc58aaaa6d0a/bin/uautomizer-verify-4GaUIPS5ZU/data/3a730aad9/4beac026c8f4494daa1d8351a3ab73cf [2024-10-31 22:19:03,992 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:19:03,994 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:19:03,997 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:19:03,998 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:19:04,005 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:19:04,005 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:19:03" (1/1) ... [2024-10-31 22:19:04,007 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d854fd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:04, skipping insertion in model container [2024-10-31 22:19:04,007 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:19:03" (1/1) ... [2024-10-31 22:19:04,044 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:19:04,238 WARN L251 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_024a5232-40fa-41ca-a374-cc58aaaa6d0a/sv-benchmarks/c/combinations/gcd_2+newton_3_6.i[1226,1239] [2024-10-31 22:19:04,268 WARN L251 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_024a5232-40fa-41ca-a374-cc58aaaa6d0a/sv-benchmarks/c/combinations/gcd_2+newton_3_6.i[2862,2875] [2024-10-31 22:19:04,270 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:19:04,285 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:19:04,301 WARN L251 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_024a5232-40fa-41ca-a374-cc58aaaa6d0a/sv-benchmarks/c/combinations/gcd_2+newton_3_6.i[1226,1239] [2024-10-31 22:19:04,314 WARN L251 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_024a5232-40fa-41ca-a374-cc58aaaa6d0a/sv-benchmarks/c/combinations/gcd_2+newton_3_6.i[2862,2875] [2024-10-31 22:19:04,318 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:19:04,338 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:19:04,338 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:04 WrapperNode [2024-10-31 22:19:04,338 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:19:04,340 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:19:04,340 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:19:04,340 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:19:04,350 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:04" (1/1) ... [2024-10-31 22:19:04,361 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:04" (1/1) ... [2024-10-31 22:19:04,388 INFO L138 Inliner]: procedures = 27, calls = 26, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 91 [2024-10-31 22:19:04,389 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:19:04,390 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:19:04,390 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:19:04,390 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:19:04,408 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:04" (1/1) ... [2024-10-31 22:19:04,408 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:04" (1/1) ... [2024-10-31 22:19:04,411 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:04" (1/1) ... [2024-10-31 22:19:04,426 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2024-10-31 22:19:04,426 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:04" (1/1) ... [2024-10-31 22:19:04,426 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:04" (1/1) ... [2024-10-31 22:19:04,432 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:04" (1/1) ... [2024-10-31 22:19:04,436 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:04" (1/1) ... [2024-10-31 22:19:04,438 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:04" (1/1) ... [2024-10-31 22:19:04,439 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:04" (1/1) ... [2024-10-31 22:19:04,442 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:19:04,443 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:19:04,443 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:19:04,443 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:19:04,444 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:04" (1/1) ... [2024-10-31 22:19:04,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:19:04,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a5232-40fa-41ca-a374-cc58aaaa6d0a/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:19:04,514 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a5232-40fa-41ca-a374-cc58aaaa6d0a/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:19:04,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a5232-40fa-41ca-a374-cc58aaaa6d0a/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:19:04,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:19:04,591 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2024-10-31 22:19:04,591 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2024-10-31 22:19:04,592 INFO L130 BoogieDeclarations]: Found specification of procedure f [2024-10-31 22:19:04,592 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2024-10-31 22:19:04,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:19:04,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:19:04,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:19:04,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:19:04,714 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:19:04,721 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:19:05,090 INFO L? ?]: Removed 29 outVars from TransFormulas that were not future-live. [2024-10-31 22:19:05,090 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:19:05,110 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:19:05,111 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-31 22:19:05,111 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:19:05 BoogieIcfgContainer [2024-10-31 22:19:05,112 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:19:05,115 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:19:05,115 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:19:05,121 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:19:05,121 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:19:03" (1/3) ... [2024-10-31 22:19:05,122 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c395267 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:19:05, skipping insertion in model container [2024-10-31 22:19:05,122 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:04" (2/3) ... [2024-10-31 22:19:05,123 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c395267 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:19:05, skipping insertion in model container [2024-10-31 22:19:05,124 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:19:05" (3/3) ... [2024-10-31 22:19:05,125 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_2+newton_3_6.i [2024-10-31 22:19:05,145 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:19:05,146 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-10-31 22:19:05,234 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:19:05,245 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, 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;@666ec28c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:19:05,245 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-10-31 22:19:05,250 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 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) [2024-10-31 22:19:05,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-31 22:19:05,260 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:19:05,261 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:05,262 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:19:05,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:05,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2024-10-31 22:19:05,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:05,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374021847] [2024-10-31 22:19:05,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:05,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:05,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:05,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:05,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:05,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374021847] [2024-10-31 22:19:05,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374021847] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:19:05,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:19:05,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:19:05,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784979120] [2024-10-31 22:19:05,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:19:05,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:19:05,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:05,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:19:05,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:19:05,836 INFO L87 Difference]: Start difference. First operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2024-10-31 22:19:05,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:19:05,994 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2024-10-31 22:19:06,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:19:06,003 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-31 22:19:06,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:19:06,015 INFO L225 Difference]: With dead ends: 78 [2024-10-31 22:19:06,015 INFO L226 Difference]: Without dead ends: 33 [2024-10-31 22:19:06,018 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:19:06,024 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 3 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:19:06,026 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 122 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:19:06,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-10-31 22:19:06,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2024-10-31 22:19:06,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 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) [2024-10-31 22:19:06,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2024-10-31 22:19:06,066 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 11 [2024-10-31 22:19:06,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:19:06,067 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2024-10-31 22:19:06,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2024-10-31 22:19:06,067 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2024-10-31 22:19:06,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-31 22:19:06,069 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:19:06,069 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:06,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:19:06,070 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:19:06,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:06,071 INFO L85 PathProgramCache]: Analyzing trace with hash 65622039, now seen corresponding path program 1 times [2024-10-31 22:19:06,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:06,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482399415] [2024-10-31 22:19:06,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:06,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:06,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:06,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:06,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:06,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482399415] [2024-10-31 22:19:06,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482399415] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:19:06,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:19:06,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:19:06,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166882414] [2024-10-31 22:19:06,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:19:06,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:19:06,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:06,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:19:06,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:19:06,181 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2024-10-31 22:19:06,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:19:06,213 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2024-10-31 22:19:06,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:19:06,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-31 22:19:06,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:19:06,219 INFO L225 Difference]: With dead ends: 39 [2024-10-31 22:19:06,219 INFO L226 Difference]: Without dead ends: 33 [2024-10-31 22:19:06,219 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:19:06,227 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 1 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:19:06,228 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 96 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:19:06,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-10-31 22:19:06,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-10-31 22:19:06,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 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) [2024-10-31 22:19:06,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2024-10-31 22:19:06,235 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 11 [2024-10-31 22:19:06,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:19:06,236 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2024-10-31 22:19:06,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2024-10-31 22:19:06,236 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2024-10-31 22:19:06,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-31 22:19:06,237 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:19:06,237 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:06,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:19:06,237 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:19:06,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:06,238 INFO L85 PathProgramCache]: Analyzing trace with hash -659390950, now seen corresponding path program 1 times [2024-10-31 22:19:06,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:06,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719259899] [2024-10-31 22:19:06,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:06,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:06,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:06,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:06,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:06,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719259899] [2024-10-31 22:19:06,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719259899] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:19:06,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928501276] [2024-10-31 22:19:06,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:06,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:06,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a5232-40fa-41ca-a374-cc58aaaa6d0a/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:19:06,540 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a5232-40fa-41ca-a374-cc58aaaa6d0a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:19:06,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a5232-40fa-41ca-a374-cc58aaaa6d0a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:19:06,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:06,615 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 22:19:06,620 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:19:06,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:06,792 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:19:06,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:06,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928501276] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:19:06,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:19:06,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-10-31 22:19:06,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790261478] [2024-10-31 22:19:06,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:19:06,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:19:06,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:06,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:19:06,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:19:06,937 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 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) [2024-10-31 22:19:07,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:19:07,036 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2024-10-31 22:19:07,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:19:07,038 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-31 22:19:07,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:19:07,039 INFO L225 Difference]: With dead ends: 40 [2024-10-31 22:19:07,039 INFO L226 Difference]: Without dead ends: 34 [2024-10-31 22:19:07,040 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:19:07,041 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:19:07,044 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 182 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:19:07,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-10-31 22:19:07,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-10-31 22:19:07,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 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) [2024-10-31 22:19:07,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2024-10-31 22:19:07,055 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 12 [2024-10-31 22:19:07,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:19:07,057 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2024-10-31 22:19:07,057 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 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) [2024-10-31 22:19:07,058 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2024-10-31 22:19:07,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-31 22:19:07,059 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:19:07,059 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:07,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a5232-40fa-41ca-a374-cc58aaaa6d0a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-31 22:19:07,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a5232-40fa-41ca-a374-cc58aaaa6d0a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:07,260 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:19:07,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:07,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1659957129, now seen corresponding path program 2 times [2024-10-31 22:19:07,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:07,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670635565] [2024-10-31 22:19:07,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:07,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:07,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:07,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:07,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:07,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670635565] [2024-10-31 22:19:07,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670635565] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:19:07,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374826694] [2024-10-31 22:19:07,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:19:07,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:07,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a5232-40fa-41ca-a374-cc58aaaa6d0a/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:19:07,855 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a5232-40fa-41ca-a374-cc58aaaa6d0a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:19:07,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a5232-40fa-41ca-a374-cc58aaaa6d0a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:19:07,953 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:19:07,953 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:19:07,959 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-31 22:19:07,963 INFO L278 TraceCheckSpWp]: Computing forward predicates...