./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb02c584-eff2-4237-84df-99d5ef2f11ec/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb02c584-eff2-4237-84df-99d5ef2f11ec/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb02c584-eff2-4237-84df-99d5ef2f11ec/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb02c584-eff2-4237-84df-99d5ef2f11ec/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb02c584-eff2-4237-84df-99d5ef2f11ec/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb02c584-eff2-4237-84df-99d5ef2f11ec/bin/uautomizer-verify-BQ2R08f2Ya --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 6c37a77a9f4db0db15bb3c5a5baacfcd5e1536d243d9987efda949cfc27e3fb7 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:36:56,890 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:36:56,957 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb02c584-eff2-4237-84df-99d5ef2f11ec/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 02:36:56,961 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:36:56,962 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:36:56,996 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:36:56,997 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:36:56,997 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:36:56,998 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:36:56,999 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:36:56,999 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:36:57,000 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:36:57,001 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:36:57,001 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:36:57,002 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:36:57,002 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:36:57,003 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 02:36:57,003 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:36:57,004 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:36:57,004 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:36:57,005 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:36:57,008 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 02:36:57,008 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:36:57,009 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 02:36:57,009 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:36:57,014 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 02:36:57,015 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:36:57,015 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:36:57,016 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:36:57,016 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:36:57,016 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:36:57,017 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:36:57,017 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:36:57,017 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:36:57,017 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 02:36:57,018 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:36:57,018 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:36:57,018 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:36:57,018 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:36:57,018 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 02:36:57,018 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:36:57,019 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:36:57,019 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_fb02c584-eff2-4237-84df-99d5ef2f11ec/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb02c584-eff2-4237-84df-99d5ef2f11ec/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c37a77a9f4db0db15bb3c5a5baacfcd5e1536d243d9987efda949cfc27e3fb7 [2023-11-29 02:36:57,248 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:36:57,295 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:36:57,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:36:57,299 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:36:57,299 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:36:57,300 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb02c584-eff2-4237-84df-99d5ef2f11ec/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound50.c [2023-11-29 02:37:00,080 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:37:00,268 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:37:00,268 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb02c584-eff2-4237-84df-99d5ef2f11ec/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound50.c [2023-11-29 02:37:00,274 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb02c584-eff2-4237-84df-99d5ef2f11ec/bin/uautomizer-verify-BQ2R08f2Ya/data/e02d43651/55d736fdefa2471988699ba960885a82/FLAGa204bca97 [2023-11-29 02:37:00,287 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb02c584-eff2-4237-84df-99d5ef2f11ec/bin/uautomizer-verify-BQ2R08f2Ya/data/e02d43651/55d736fdefa2471988699ba960885a82 [2023-11-29 02:37:00,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:37:00,290 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:37:00,291 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:37:00,291 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:37:00,296 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:37:00,297 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:37:00" (1/1) ... [2023-11-29 02:37:00,298 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@687567b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:00, skipping insertion in model container [2023-11-29 02:37:00,298 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:37:00" (1/1) ... [2023-11-29 02:37:00,320 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:37:00,462 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb02c584-eff2-4237-84df-99d5ef2f11ec/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound50.c[520,533] [2023-11-29 02:37:00,478 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:37:00,486 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:37:00,499 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb02c584-eff2-4237-84df-99d5ef2f11ec/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound50.c[520,533] [2023-11-29 02:37:00,505 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:37:00,516 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:37:00,516 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:00 WrapperNode [2023-11-29 02:37:00,516 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:37:00,517 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:37:00,517 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:37:00,518 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:37:00,524 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:00" (1/1) ... [2023-11-29 02:37:00,530 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:00" (1/1) ... [2023-11-29 02:37:00,547 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2023-11-29 02:37:00,548 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:37:00,549 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:37:00,549 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:37:00,549 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:37:00,560 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:00" (1/1) ... [2023-11-29 02:37:00,560 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:00" (1/1) ... [2023-11-29 02:37:00,561 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:00" (1/1) ... [2023-11-29 02:37:00,572 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-29 02:37:00,572 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:00" (1/1) ... [2023-11-29 02:37:00,573 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:00" (1/1) ... [2023-11-29 02:37:00,575 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:00" (1/1) ... [2023-11-29 02:37:00,577 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:00" (1/1) ... [2023-11-29 02:37:00,578 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:00" (1/1) ... [2023-11-29 02:37:00,579 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:00" (1/1) ... [2023-11-29 02:37:00,580 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:37:00,581 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:37:00,581 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:37:00,581 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:37:00,582 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:00" (1/1) ... [2023-11-29 02:37:00,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:37:00,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb02c584-eff2-4237-84df-99d5ef2f11ec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:37:00,608 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb02c584-eff2-4237-84df-99d5ef2f11ec/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:37:00,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb02c584-eff2-4237-84df-99d5ef2f11ec/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:37:00,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:37:00,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 02:37:00,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:37:00,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:37:00,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-29 02:37:00,644 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-29 02:37:00,700 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:37:00,702 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:37:00,812 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:37:00,833 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:37:00,833 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 02:37:00,833 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:37:00 BoogieIcfgContainer [2023-11-29 02:37:00,834 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:37:00,837 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:37:00,837 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:37:00,841 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:37:00,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:37:00" (1/3) ... [2023-11-29 02:37:00,842 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39717702 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:37:00, skipping insertion in model container [2023-11-29 02:37:00,842 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:37:00" (2/3) ... [2023-11-29 02:37:00,842 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39717702 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:37:00, skipping insertion in model container [2023-11-29 02:37:00,843 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:37:00" (3/3) ... [2023-11-29 02:37:00,844 INFO L112 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound50.c [2023-11-29 02:37:00,864 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:37:00,864 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 02:37:00,909 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:37:00,917 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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;@2f61e326, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:37:00,917 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 02:37:00,922 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 02:37:00,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-29 02:37:00,929 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:37:00,929 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 02:37:00,930 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:37:00,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:37:00,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1811081999, now seen corresponding path program 1 times [2023-11-29 02:37:00,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:37:00,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552705568] [2023-11-29 02:37:00,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:00,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:37:01,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:01,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:37:01,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:37:01,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552705568] [2023-11-29 02:37:01,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552705568] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:37:01,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:37:01,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:37:01,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713344095] [2023-11-29 02:37:01,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:37:01,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 02:37:01,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:37:01,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 02:37:01,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 02:37:01,126 INFO L87 Difference]: Start difference. First operand has 18 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:37:01,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:37:01,153 INFO L93 Difference]: Finished difference Result 35 states and 57 transitions. [2023-11-29 02:37:01,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 02:37:01,155 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-29 02:37:01,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:37:01,163 INFO L225 Difference]: With dead ends: 35 [2023-11-29 02:37:01,163 INFO L226 Difference]: Without dead ends: 16 [2023-11-29 02:37:01,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 02:37:01,170 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:37:01,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:37:01,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-29 02:37:01,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-29 02:37:01,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 02:37:01,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2023-11-29 02:37:01,206 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 6 [2023-11-29 02:37:01,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:37:01,207 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2023-11-29 02:37:01,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:37:01,207 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2023-11-29 02:37:01,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-29 02:37:01,208 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:37:01,208 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:37:01,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 02:37:01,209 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:37:01,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:37:01,210 INFO L85 PathProgramCache]: Analyzing trace with hash -772994646, now seen corresponding path program 1 times [2023-11-29 02:37:01,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:37:01,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146070414] [2023-11-29 02:37:01,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:01,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:37:01,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:01,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:37:01,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:37:01,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146070414] [2023-11-29 02:37:01,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146070414] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:37:01,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:37:01,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:37:01,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534493235] [2023-11-29 02:37:01,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:37:01,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:37:01,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:37:01,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:37:01,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:37:01,309 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:37:01,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:37:01,331 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2023-11-29 02:37:01,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:37:01,331 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-29 02:37:01,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:37:01,332 INFO L225 Difference]: With dead ends: 27 [2023-11-29 02:37:01,332 INFO L226 Difference]: Without dead ends: 18 [2023-11-29 02:37:01,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:37:01,334 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:37:01,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:37:01,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-29 02:37:01,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-29 02:37:01,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 02:37:01,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2023-11-29 02:37:01,342 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 7 [2023-11-29 02:37:01,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:37:01,342 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2023-11-29 02:37:01,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:37:01,343 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2023-11-29 02:37:01,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-29 02:37:01,344 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:37:01,344 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:37:01,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 02:37:01,344 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:37:01,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:37:01,345 INFO L85 PathProgramCache]: Analyzing trace with hash -771326350, now seen corresponding path program 1 times [2023-11-29 02:37:01,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:37:01,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717430285] [2023-11-29 02:37:01,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:01,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:37:01,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:01,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:37:01,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:37:01,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717430285] [2023-11-29 02:37:01,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717430285] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:37:01,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:37:01,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:37:01,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976074124] [2023-11-29 02:37:01,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:37:01,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:37:01,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:37:01,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:37:01,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:37:01,501 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:37:01,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:37:01,558 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2023-11-29 02:37:01,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:37:01,558 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-29 02:37:01,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:37:01,559 INFO L225 Difference]: With dead ends: 24 [2023-11-29 02:37:01,560 INFO L226 Difference]: Without dead ends: 22 [2023-11-29 02:37:01,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:37:01,562 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 8 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:37:01,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 50 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:37:01,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-29 02:37:01,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-29 02:37:01,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 02:37:01,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2023-11-29 02:37:01,573 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 7 [2023-11-29 02:37:01,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:37:01,574 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2023-11-29 02:37:01,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:37:01,574 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2023-11-29 02:37:01,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-29 02:37:01,575 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:37:01,575 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:37:01,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 02:37:01,576 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:37:01,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:37:01,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1515882446, now seen corresponding path program 1 times [2023-11-29 02:37:01,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:37:01,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675710731] [2023-11-29 02:37:01,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:01,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:37:01,590 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:37:01,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1054243590] [2023-11-29 02:37:01,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:01,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:37:01,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb02c584-eff2-4237-84df-99d5ef2f11ec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:37:01,594 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb02c584-eff2-4237-84df-99d5ef2f11ec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:37:01,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb02c584-eff2-4237-84df-99d5ef2f11ec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:37:01,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:01,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 02:37:01,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:37:01,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:37:01,764 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:37:01,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:37:01,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:37:01,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675710731] [2023-11-29 02:37:01,909 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:37:01,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054243590] [2023-11-29 02:37:01,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054243590] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:37:01,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:37:01,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-11-29 02:37:01,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582489919] [2023-11-29 02:37:01,910 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:37:01,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 02:37:01,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:37:01,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 02:37:01,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:37:01,913 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 8 states have internal predecessors, (16), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 02:37:02,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:37:02,054 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2023-11-29 02:37:02,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 02:37:02,055 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.6) internal successors, (16), 8 states have internal predecessors, (16), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 12 [2023-11-29 02:37:02,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:37:02,057 INFO L225 Difference]: With dead ends: 43 [2023-11-29 02:37:02,057 INFO L226 Difference]: Without dead ends: 38 [2023-11-29 02:37:02,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-29 02:37:02,059 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 23 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:37:02,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 61 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:37:02,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-29 02:37:02,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2023-11-29 02:37:02,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 02:37:02,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2023-11-29 02:37:02,074 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 12 [2023-11-29 02:37:02,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:37:02,075 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2023-11-29 02:37:02,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.6) internal successors, (16), 8 states have internal predecessors, (16), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 02:37:02,075 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2023-11-29 02:37:02,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-29 02:37:02,076 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:37:02,077 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:37:02,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb02c584-eff2-4237-84df-99d5ef2f11ec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 02:37:02,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb02c584-eff2-4237-84df-99d5ef2f11ec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:37:02,280 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:37:02,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:37:02,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1450105813, now seen corresponding path program 1 times [2023-11-29 02:37:02,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:37:02,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371621270] [2023-11-29 02:37:02,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:02,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:37:02,292 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:37:02,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1332632445] [2023-11-29 02:37:02,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:02,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:37:02,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb02c584-eff2-4237-84df-99d5ef2f11ec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:37:02,294 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb02c584-eff2-4237-84df-99d5ef2f11ec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:37:02,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb02c584-eff2-4237-84df-99d5ef2f11ec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 02:37:02,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:02,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 02:37:02,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:37:02,395 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-29 02:37:02,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:37:02,445 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 02:37:02,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:37:02,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371621270] [2023-11-29 02:37:02,446 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:37:02,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332632445] [2023-11-29 02:37:02,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332632445] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:37:02,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:37:02,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-11-29 02:37:02,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125384191] [2023-11-29 02:37:02,447 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:37:02,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 02:37:02,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:37:02,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 02:37:02,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-29 02:37:02,449 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-29 02:37:02,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:37:02,584 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2023-11-29 02:37:02,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 02:37:02,585 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 35 [2023-11-29 02:37:02,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:37:02,587 INFO L225 Difference]: With dead ends: 103 [2023-11-29 02:37:02,587 INFO L226 Difference]: Without dead ends: 86 [2023-11-29 02:37:02,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:37:02,589 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 33 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:37:02,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 97 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:37:02,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-29 02:37:02,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2023-11-29 02:37:02,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 52 states have internal predecessors, (56), 21 states have call successors, (21), 11 states have call predecessors, (21), 11 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-29 02:37:02,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2023-11-29 02:37:02,616 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 35 [2023-11-29 02:37:02,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:37:02,617 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2023-11-29 02:37:02,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-29 02:37:02,617 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2023-11-29 02:37:02,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-29 02:37:02,618 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:37:02,619 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-29 02:37:02,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb02c584-eff2-4237-84df-99d5ef2f11ec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 02:37:02,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb02c584-eff2-4237-84df-99d5ef2f11ec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:37:02,824 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:37:02,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:37:02,824 INFO L85 PathProgramCache]: Analyzing trace with hash -563431693, now seen corresponding path program 1 times [2023-11-29 02:37:02,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:37:02,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814342043] [2023-11-29 02:37:02,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:02,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:37:02,832 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:37:02,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1558651253] [2023-11-29 02:37:02,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:02,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:37:02,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb02c584-eff2-4237-84df-99d5ef2f11ec/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:37:02,833 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb02c584-eff2-4237-84df-99d5ef2f11ec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:37:02,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb02c584-eff2-4237-84df-99d5ef2f11ec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 02:37:02,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:02,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 02:37:02,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:37:02,997 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-29 02:37:02,997 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:37:03,171 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 02:37:03,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:37:03,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814342043] [2023-11-29 02:37:03,172 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:37:03,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558651253] [2023-11-29 02:37:03,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558651253] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:37:03,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:37:03,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2023-11-29 02:37:03,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7073745] [2023-11-29 02:37:03,173 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:37:03,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 02:37:03,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:37:03,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 02:37:03,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-11-29 02:37:03,175 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2023-11-29 02:37:03,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:37:03,319 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2023-11-29 02:37:03,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 02:37:03,319 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) Word has length 35 [2023-11-29 02:37:03,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:37:03,320 INFO L225 Difference]: With dead ends: 82 [2023-11-29 02:37:03,320 INFO L226 Difference]: Without dead ends: 0 [2023-11-29 02:37:03,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-11-29 02:37:03,322 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:37:03,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 76 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:37:03,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-29 02:37:03,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-29 02:37:03,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2023-11-29 02:37:03,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-29 02:37:03,323 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2023-11-29 02:37:03,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:37:03,324 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-29 02:37:03,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2023-11-29 02:37:03,324 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-29 02:37:03,324 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-29 02:37:03,326 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-29 02:37:03,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb02c584-eff2-4237-84df-99d5ef2f11ec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 02:37:03,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb02c584-eff2-4237-84df-99d5ef2f11ec/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 02:37:03,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-11-29 02:37:04,529 INFO L899 garLoopResultBuilder]: For program point L33(lines 30 42) no Hoare annotation was computed. [2023-11-29 02:37:04,529 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-11-29 02:37:04,529 INFO L895 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2023-11-29 02:37:04,530 INFO L895 garLoopResultBuilder]: At program point L31-1(line 31) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2023-11-29 02:37:04,530 INFO L899 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2023-11-29 02:37:04,530 INFO L895 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2023-11-29 02:37:04,530 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-11-29 02:37:04,530 INFO L895 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2023-11-29 02:37:04,530 INFO L899 garLoopResultBuilder]: For program point L30-1(lines 30 42) no Hoare annotation was computed. [2023-11-29 02:37:04,531 INFO L895 garLoopResultBuilder]: At program point L30-3(lines 30 42) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2023-11-29 02:37:04,531 INFO L895 garLoopResultBuilder]: At program point L30-4(lines 30 42) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2023-11-29 02:37:04,531 INFO L895 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2023-11-29 02:37:04,531 INFO L899 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2023-11-29 02:37:04,531 INFO L899 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2023-11-29 02:37:04,531 INFO L899 garLoopResultBuilder]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2023-11-29 02:37:04,531 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2023-11-29 02:37:04,532 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 11 17) the Hoare annotation is: true [2023-11-29 02:37:04,532 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2023-11-29 02:37:04,535 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-11-29 02:37:04,537 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-29 02:37:04,545 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 02:37:04 BoogieIcfgContainer [2023-11-29 02:37:04,545 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-29 02:37:04,546 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-29 02:37:04,546 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-29 02:37:04,546 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-29 02:37:04,547 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:37:00" (3/4) ... [2023-11-29 02:37:04,549 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-29 02:37:04,552 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2023-11-29 02:37:04,556 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2023-11-29 02:37:04,556 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-11-29 02:37:04,556 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-29 02:37:04,556 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-29 02:37:04,627 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb02c584-eff2-4237-84df-99d5ef2f11ec/bin/uautomizer-verify-BQ2R08f2Ya/witness.graphml [2023-11-29 02:37:04,627 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb02c584-eff2-4237-84df-99d5ef2f11ec/bin/uautomizer-verify-BQ2R08f2Ya/witness.yml [2023-11-29 02:37:04,627 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-29 02:37:04,628 INFO L158 Benchmark]: Toolchain (without parser) took 4337.76ms. Allocated memory is still 159.4MB. Free memory was 129.5MB in the beginning and 121.4MB in the end (delta: 8.1MB). Peak memory consumption was 9.2MB. Max. memory is 16.1GB. [2023-11-29 02:37:04,628 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 121.6MB. Free memory is still 96.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 02:37:04,629 INFO L158 Benchmark]: CACSL2BoogieTranslator took 225.68ms. Allocated memory is still 159.4MB. Free memory was 129.5MB in the beginning and 118.6MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-29 02:37:04,629 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.70ms. Allocated memory is still 159.4MB. Free memory was 118.6MB in the beginning and 117.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 02:37:04,629 INFO L158 Benchmark]: Boogie Preprocessor took 31.57ms. Allocated memory is still 159.4MB. Free memory was 117.0MB in the beginning and 115.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 02:37:04,630 INFO L158 Benchmark]: RCFGBuilder took 252.74ms. Allocated memory is still 159.4MB. Free memory was 115.4MB in the beginning and 104.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-29 02:37:04,630 INFO L158 Benchmark]: TraceAbstraction took 3708.59ms. Allocated memory is still 159.4MB. Free memory was 104.0MB in the beginning and 125.6MB in the end (delta: -21.6MB). Peak memory consumption was 49.1MB. Max. memory is 16.1GB. [2023-11-29 02:37:04,631 INFO L158 Benchmark]: Witness Printer took 81.40ms. Allocated memory is still 159.4MB. Free memory was 125.6MB in the beginning and 121.4MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-29 02:37:04,632 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 121.6MB. Free memory is still 96.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 225.68ms. Allocated memory is still 159.4MB. Free memory was 129.5MB in the beginning and 118.6MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.70ms. Allocated memory is still 159.4MB. Free memory was 118.6MB in the beginning and 117.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 31.57ms. Allocated memory is still 159.4MB. Free memory was 117.0MB in the beginning and 115.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 252.74ms. Allocated memory is still 159.4MB. Free memory was 115.4MB in the beginning and 104.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 3708.59ms. Allocated memory is still 159.4MB. Free memory was 104.0MB in the beginning and 125.6MB in the end (delta: -21.6MB). Peak memory consumption was 49.1MB. Max. memory is 16.1GB. * Witness Printer took 81.40ms. Allocated memory is still 159.4MB. Free memory was 125.6MB in the beginning and 121.4MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.6s, OverallIterations: 6, TraceHistogramMax: 6, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 101 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 78 mSDsluCounter, 362 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 258 mSDsCounter, 41 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 248 IncrementalHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 41 mSolverCounterUnsat, 104 mSDtfsCounter, 248 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 175 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=82occurred in iteration=5, InterpolantAutomatonStates: 40, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 8 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 43 PreInvPairs, 72 NumberOfFragments, 141 HoareAnnotationTreeSize, 43 FomulaSimplifications, 449 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 607 FormulaSimplificationTreeSizeReductionInter, 1.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 102 NumberOfCodeBlocks, 102 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 175 ConstructedInterpolants, 0 QuantifiedInterpolants, 640 SizeOfPredicates, 7 NumberOfNonLiveVariables, 258 ConjunctsInSsa, 43 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 181/218 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: ((t == (1 + (2 * a))) && ((s * 4) == (((t * t) + (2 * t)) + 1))) RESULT: Ultimate proved your program to be correct! [2023-11-29 02:37:04,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb02c584-eff2-4237-84df-99d5ef2f11ec/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE