./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 63182f13
Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/bin/uautomizer-YU5uOKAj3y/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_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/bin/uautomizer-YU5uOKAj3y --witnessprinter.witness.filename witness.graphml --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 0.2.1-dev-63182f1
[2021-11-13 18:09:26,137 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2021-11-13 18:09:26,141 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2021-11-13 18:09:26,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-11-13 18:09:26,201 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-11-13 18:09:26,205 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-11-13 18:09:26,207 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2021-11-13 18:09:26,211 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2021-11-13 18:09:26,213 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2021-11-13 18:09:26,219 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2021-11-13 18:09:26,220 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2021-11-13 18:09:26,222 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2021-11-13 18:09:26,223 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2021-11-13 18:09:26,225 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2021-11-13 18:09:26,228 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2021-11-13 18:09:26,233 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-11-13 18:09:26,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-11-13 18:09:26,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-11-13 18:09:26,238 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-11-13 18:09:26,246 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2021-11-13 18:09:26,248 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-11-13 18:09:26,250 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-11-13 18:09:26,253 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2021-11-13 18:09:26,254 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2021-11-13 18:09:26,263 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2021-11-13 18:09:26,264 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2021-11-13 18:09:26,264 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2021-11-13 18:09:26,266 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2021-11-13 18:09:26,267 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2021-11-13 18:09:26,269 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2021-11-13 18:09:26,269 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2021-11-13 18:09:26,270 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2021-11-13 18:09:26,273 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2021-11-13 18:09:26,274 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2021-11-13 18:09:26,276 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2021-11-13 18:09:26,276 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2021-11-13 18:09:26,277 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2021-11-13 18:09:26,278 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2021-11-13 18:09:26,278 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2021-11-13 18:09:26,279 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2021-11-13 18:09:26,280 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2021-11-13 18:09:26,281 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf
[2021-11-13 18:09:26,325 INFO L113 SettingsManager]: Loading preferences was successful
[2021-11-13 18:09:26,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2021-11-13 18:09:26,326 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2021-11-13 18:09:26,326 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2021-11-13 18:09:26,327 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2021-11-13 18:09:26,327 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2021-11-13 18:09:26,329 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2021-11-13 18:09:26,329 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2021-11-13 18:09:26,329 INFO L138 SettingsManager]: * Use SBE=true
[2021-11-13 18:09:26,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-11-13 18:09:26,330 INFO L138 SettingsManager]: * sizeof long=4
[2021-11-13 18:09:26,331 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2021-11-13 18:09:26,331 INFO L138 SettingsManager]: * sizeof POINTER=4
[2021-11-13 18:09:26,331 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2021-11-13 18:09:26,331 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2021-11-13 18:09:26,332 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-11-13 18:09:26,332 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2021-11-13 18:09:26,332 INFO L138 SettingsManager]: * sizeof long double=12
[2021-11-13 18:09:26,332 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2021-11-13 18:09:26,332 INFO L138 SettingsManager]: * Use constant arrays=true
[2021-11-13 18:09:26,333 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2021-11-13 18:09:26,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-11-13 18:09:26,333 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2021-11-13 18:09:26,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2021-11-13 18:09:26,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-11-13 18:09:26,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-11-13 18:09:26,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2021-11-13 18:09:26,334 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2021-11-13 18:09:26,335 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2021-11-13 18:09:26,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2021-11-13 18:09:26,336 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF
[2021-11-13 18:09:26,337 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET
[2021-11-13 18:09:26,337 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-11-13 18:09:26,337 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2021-11-13 18:09:26,337 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode
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_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/bin/uautomizer-YU5uOKAj3y/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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/bin/uautomizer-YU5uOKAj3y
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) )
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c37a77a9f4db0db15bb3c5a5baacfcd5e1536d243d9987efda949cfc27e3fb7
[2021-11-13 18:09:26,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2021-11-13 18:09:26,642 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-11-13 18:09:26,645 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-11-13 18:09:26,646 INFO L271 PluginConnector]: Initializing CDTParser...
[2021-11-13 18:09:26,647 INFO L275 PluginConnector]: CDTParser initialized
[2021-11-13 18:09:26,648 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound50.c
[2021-11-13 18:09:26,717 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/bin/uautomizer-YU5uOKAj3y/data/858ea754b/6c6deaa1cbfa43cc91e9aeb1e47e64c7/FLAG1d42ca289
[2021-11-13 18:09:27,225 INFO L306 CDTParser]: Found 1 translation units.
[2021-11-13 18:09:27,226 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound50.c
[2021-11-13 18:09:27,238 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/bin/uautomizer-YU5uOKAj3y/data/858ea754b/6c6deaa1cbfa43cc91e9aeb1e47e64c7/FLAG1d42ca289
[2021-11-13 18:09:27,577 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/bin/uautomizer-YU5uOKAj3y/data/858ea754b/6c6deaa1cbfa43cc91e9aeb1e47e64c7
[2021-11-13 18:09:27,579 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-11-13 18:09:27,581 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements.
[2021-11-13 18:09:27,584 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-11-13 18:09:27,585 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-11-13 18:09:27,602 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2021-11-13 18:09:27,603 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:09:27" (1/1) ...
[2021-11-13 18:09:27,604 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71348127 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:09:27, skipping insertion in model container
[2021-11-13 18:09:27,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:09:27" (1/1) ...
[2021-11-13 18:09:27,614 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2021-11-13 18:09:27,630 INFO L178 MainTranslator]: Built tables and reachable declarations
[2021-11-13 18:09:27,899 WARN L228 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_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound50.c[520,533]
[2021-11-13 18:09:27,925 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-11-13 18:09:27,938 INFO L203 MainTranslator]: Completed pre-run
[2021-11-13 18:09:27,955 WARN L228 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_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound50.c[520,533]
[2021-11-13 18:09:27,978 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-11-13 18:09:27,994 INFO L208 MainTranslator]: Completed translation
[2021-11-13 18:09:27,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:09:27 WrapperNode
[2021-11-13 18:09:27,995 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-11-13 18:09:27,996 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2021-11-13 18:09:27,997 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner...
[2021-11-13 18:09:27,997 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized
[2021-11-13 18:09:28,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:09:27" (1/1) ...
[2021-11-13 18:09:28,013 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:09:27" (1/1) ...
[2021-11-13 18:09:28,035 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2021-11-13 18:09:28,036 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-11-13 18:09:28,036 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2021-11-13 18:09:28,037 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2021-11-13 18:09:28,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:09:27" (1/1) ...
[2021-11-13 18:09:28,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:09:27" (1/1) ...
[2021-11-13 18:09:28,058 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:09:27" (1/1) ...
[2021-11-13 18:09:28,059 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:09:27" (1/1) ...
[2021-11-13 18:09:28,063 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:09:27" (1/1) ...
[2021-11-13 18:09:28,073 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:09:27" (1/1) ...
[2021-11-13 18:09:28,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:09:27" (1/1) ...
[2021-11-13 18:09:28,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-11-13 18:09:28,081 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-11-13 18:09:28,081 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2021-11-13 18:09:28,082 INFO L275 PluginConnector]: RCFGBuilder initialized
[2021-11-13 18:09:28,083 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:09:27" (1/1) ...
[2021-11-13 18:09:28,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-11-13 18:09:28,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/bin/uautomizer-YU5uOKAj3y/z3
[2021-11-13 18:09:28,122 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2021-11-13 18:09:28,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2021-11-13 18:09:28,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2021-11-13 18:09:28,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-11-13 18:09:28,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-11-13 18:09:28,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-11-13 18:09:28,181 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2021-11-13 18:09:28,181 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2021-11-13 18:09:28,458 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-11-13 18:09:28,458 INFO L299 CfgBuilder]: Removed 1 assume(true) statements.
[2021-11-13 18:09:28,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:09:28 BoogieIcfgContainer
[2021-11-13 18:09:28,460 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-11-13 18:09:28,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-11-13 18:09:28,462 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2021-11-13 18:09:28,480 INFO L275 PluginConnector]: TraceAbstraction initialized
[2021-11-13 18:09:28,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:09:27" (1/3) ...
[2021-11-13 18:09:28,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a3fbead and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:09:28, skipping insertion in model container
[2021-11-13 18:09:28,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:09:27" (2/3) ...
[2021-11-13 18:09:28,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a3fbead and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:09:28, skipping insertion in model container
[2021-11-13 18:09:28,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:09:28" (3/3) ...
[2021-11-13 18:09:28,483 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound50.c
[2021-11-13 18:09:28,488 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2021-11-13 18:09:28,489 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2021-11-13 18:09:28,585 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2021-11-13 18:09:28,595 INFO L339 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=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR
[2021-11-13 18:09:28,596 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-11-13 18:09:28,630 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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)
[2021-11-13 18:09:28,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8
[2021-11-13 18:09:28,634 INFO L506 BasicCegarLoop]: Found error trace
[2021-11-13 18:09:28,635 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:09:28,636 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-13 18:09:28,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-11-13 18:09:28,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1821846948, now seen corresponding path program 1 times
[2021-11-13 18:09:28,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-13 18:09:28,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845003559]
[2021-11-13 18:09:28,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:09:28,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-13 18:09:28,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-13 18:09:28,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-11-13 18:09:28,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-13 18:09:28,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845003559]
[2021-11-13 18:09:28,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845003559] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-13 18:09:28,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-11-13 18:09:28,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2021-11-13 18:09:28,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906701512]
[2021-11-13 18:09:28,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-13 18:09:28,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2021-11-13 18:09:28,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-13 18:09:28,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2021-11-13 18:09:28,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2021-11-13 18:09:28,890 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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 3.0) internal successors, (6), 2 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)
[2021-11-13 18:09:28,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-13 18:09:28,918 INFO L93 Difference]: Finished difference Result 40 states and 62 transitions.
[2021-11-13 18:09:28,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states.
[2021-11-13 18:09:28,921 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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
[2021-11-13 18:09:28,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-13 18:09:28,929 INFO L225 Difference]: With dead ends: 40
[2021-11-13 18:09:28,930 INFO L226 Difference]: Without dead ends: 17
[2021-11-13 18:09:28,934 INFO L932 BasicCegarLoop]: 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
[2021-11-13 18:09:28,939 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.80ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time
[2021-11-13 18:09:28,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 1.80ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time]
[2021-11-13 18:09:28,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states.
[2021-11-13 18:09:28,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17.
[2021-11-13 18:09:28,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 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)
[2021-11-13 18:09:28,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions.
[2021-11-13 18:09:28,989 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 7
[2021-11-13 18:09:28,990 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-11-13 18:09:28,990 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions.
[2021-11-13 18:09:28,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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)
[2021-11-13 18:09:28,991 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions.
[2021-11-13 18:09:28,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9
[2021-11-13 18:09:28,992 INFO L506 BasicCegarLoop]: Found error trace
[2021-11-13 18:09:28,993 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:09:28,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-11-13 18:09:28,994 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-13 18:09:28,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-11-13 18:09:29,000 INFO L85 PathProgramCache]: Analyzing trace with hash 178653015, now seen corresponding path program 1 times
[2021-11-13 18:09:29,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-13 18:09:29,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424930892]
[2021-11-13 18:09:29,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:09:29,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-13 18:09:29,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-13 18:09:29,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-11-13 18:09:29,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-13 18:09:29,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424930892]
[2021-11-13 18:09:29,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424930892] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-13 18:09:29,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-11-13 18:09:29,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-11-13 18:09:29,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017061943]
[2021-11-13 18:09:29,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-13 18:09:29,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2021-11-13 18:09:29,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-13 18:09:29,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2021-11-13 18:09:29,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2021-11-13 18:09:29,130 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-13 18:09:29,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-13 18:09:29,163 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions.
[2021-11-13 18:09:29,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states.
[2021-11-13 18:09:29,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8
[2021-11-13 18:09:29,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-13 18:09:29,166 INFO L225 Difference]: With dead ends: 28
[2021-11-13 18:09:29,166 INFO L226 Difference]: Without dead ends: 19
[2021-11-13 18:09:29,171 INFO L932 BasicCegarLoop]: 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
[2021-11-13 18:09:29,173 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.58ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.32ms IncrementalHoareTripleChecker+Time
[2021-11-13 18:09:29,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 8 Unknown, 0 Unchecked, 4.58ms Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 19.32ms Time]
[2021-11-13 18:09:29,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states.
[2021-11-13 18:09:29,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19.
[2021-11-13 18:09:29,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 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)
[2021-11-13 18:09:29,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions.
[2021-11-13 18:09:29,187 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 8
[2021-11-13 18:09:29,187 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-11-13 18:09:29,188 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions.
[2021-11-13 18:09:29,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-13 18:09:29,188 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions.
[2021-11-13 18:09:29,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9
[2021-11-13 18:09:29,190 INFO L506 BasicCegarLoop]: Found error trace
[2021-11-13 18:09:29,190 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:09:29,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-11-13 18:09:29,192 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-13 18:09:29,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-11-13 18:09:29,197 INFO L85 PathProgramCache]: Analyzing trace with hash 180321311, now seen corresponding path program 1 times
[2021-11-13 18:09:29,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-13 18:09:29,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041304673]
[2021-11-13 18:09:29,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:09:29,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-13 18:09:29,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-13 18:09:29,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-11-13 18:09:29,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-13 18:09:29,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041304673]
[2021-11-13 18:09:29,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041304673] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-13 18:09:29,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-11-13 18:09:29,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2021-11-13 18:09:29,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881394711]
[2021-11-13 18:09:29,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-13 18:09:29,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2021-11-13 18:09:29,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-13 18:09:29,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2021-11-13 18:09:29,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2021-11-13 18:09:29,337 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-13 18:09:29,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-13 18:09:29,427 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions.
[2021-11-13 18:09:29,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2021-11-13 18:09:29,428 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8
[2021-11-13 18:09:29,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-13 18:09:29,430 INFO L225 Difference]: With dead ends: 25
[2021-11-13 18:09:29,430 INFO L226 Difference]: Without dead ends: 23
[2021-11-13 18:09:29,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2021-11-13 18:09:29,435 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 57.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.38ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 65.93ms IncrementalHoareTripleChecker+Time
[2021-11-13 18:09:29,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 57 Invalid, 23 Unknown, 0 Unchecked, 3.38ms Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 65.93ms Time]
[2021-11-13 18:09:29,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states.
[2021-11-13 18:09:29,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23.
[2021-11-13 18:09:29,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 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)
[2021-11-13 18:09:29,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions.
[2021-11-13 18:09:29,452 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 8
[2021-11-13 18:09:29,452 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-11-13 18:09:29,452 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions.
[2021-11-13 18:09:29,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-13 18:09:29,453 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions.
[2021-11-13 18:09:29,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2021-11-13 18:09:29,453 INFO L506 BasicCegarLoop]: Found error trace
[2021-11-13 18:09:29,454 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:09:29,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2021-11-13 18:09:29,454 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-13 18:09:29,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-11-13 18:09:29,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1242689983, now seen corresponding path program 1 times
[2021-11-13 18:09:29,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-13 18:09:29,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542526685]
[2021-11-13 18:09:29,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:09:29,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-13 18:09:29,478 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-11-13 18:09:29,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1919432551]
[2021-11-13 18:09:29,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:09:29,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-13 18:09:29,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/bin/uautomizer-YU5uOKAj3y/z3
[2021-11-13 18:09:29,488 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-13 18:09:29,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2021-11-13 18:09:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-13 18:09:29,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core
[2021-11-13 18:09:29,586 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-11-13 18:09:29,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-11-13 18:09:29,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2021-11-13 18:09:29,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-13 18:09:29,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542526685]
[2021-11-13 18:09:29,739 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-11-13 18:09:29,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919432551]
[2021-11-13 18:09:29,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919432551] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-13 18:09:29,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-11-13 18:09:29,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2021-11-13 18:09:29,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546853925]
[2021-11-13 18:09:29,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-13 18:09:29,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2021-11-13 18:09:29,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-13 18:09:29,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2021-11-13 18:09:29,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2021-11-13 18:09:29,743 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2021-11-13 18:09:29,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-13 18:09:29,791 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions.
[2021-11-13 18:09:29,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2021-11-13 18:09:29,792 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13
[2021-11-13 18:09:29,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-13 18:09:29,793 INFO L225 Difference]: With dead ends: 36
[2021-11-13 18:09:29,794 INFO L226 Difference]: Without dead ends: 34
[2021-11-13 18:09:29,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2021-11-13 18:09:29,795 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.82ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.49ms IncrementalHoareTripleChecker+Time
[2021-11-13 18:09:29,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 90 Invalid, 30 Unknown, 0 Unchecked, 1.82ms Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 31.49ms Time]
[2021-11-13 18:09:29,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states.
[2021-11-13 18:09:29,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33.
[2021-11-13 18:09:29,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 20 states have internal predecessors, (22), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10)
[2021-11-13 18:09:29,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions.
[2021-11-13 18:09:29,806 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 13
[2021-11-13 18:09:29,806 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-11-13 18:09:29,806 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions.
[2021-11-13 18:09:29,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2021-11-13 18:09:29,807 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions.
[2021-11-13 18:09:29,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2021-11-13 18:09:29,807 INFO L506 BasicCegarLoop]: Found error trace
[2021-11-13 18:09:29,808 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:09:29,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2021-11-13 18:09:30,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-13 18:09:30,025 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-13 18:09:30,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-11-13 18:09:30,026 INFO L85 PathProgramCache]: Analyzing trace with hash 892115231, now seen corresponding path program 1 times
[2021-11-13 18:09:30,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-13 18:09:30,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914556129]
[2021-11-13 18:09:30,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:09:30,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-13 18:09:30,036 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-11-13 18:09:30,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [300012577]
[2021-11-13 18:09:30,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:09:30,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-13 18:09:30,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/bin/uautomizer-YU5uOKAj3y/z3
[2021-11-13 18:09:30,038 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-13 18:09:30,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2021-11-13 18:09:30,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-13 18:09:30,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core
[2021-11-13 18:09:30,097 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-11-13 18:09:30,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2021-11-13 18:09:30,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2021-11-13 18:09:30,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-13 18:09:30,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914556129]
[2021-11-13 18:09:30,187 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-11-13 18:09:30,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300012577]
[2021-11-13 18:09:30,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300012577] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-13 18:09:30,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-11-13 18:09:30,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2021-11-13 18:09:30,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81158461]
[2021-11-13 18:09:30,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-13 18:09:30,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2021-11-13 18:09:30,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-13 18:09:30,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2021-11-13 18:09:30,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2021-11-13 18:09:30,189 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)
[2021-11-13 18:09:30,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-13 18:09:30,255 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions.
[2021-11-13 18:09:30,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2021-11-13 18:09:30,258 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18
[2021-11-13 18:09:30,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-13 18:09:30,260 INFO L225 Difference]: With dead ends: 40
[2021-11-13 18:09:30,262 INFO L226 Difference]: Without dead ends: 35
[2021-11-13 18:09:30,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2021-11-13 18:09:30,264 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.53ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.12ms IncrementalHoareTripleChecker+Time
[2021-11-13 18:09:30,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 93 Invalid, 27 Unknown, 0 Unchecked, 3.53ms Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 39.12ms Time]
[2021-11-13 18:09:30,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states.
[2021-11-13 18:09:30,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35.
[2021-11-13 18:09:30,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 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)
[2021-11-13 18:09:30,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions.
[2021-11-13 18:09:30,279 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 18
[2021-11-13 18:09:30,280 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-11-13 18:09:30,280 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions.
[2021-11-13 18:09:30,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)
[2021-11-13 18:09:30,280 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions.
[2021-11-13 18:09:30,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2021-11-13 18:09:30,281 INFO L506 BasicCegarLoop]: Found error trace
[2021-11-13 18:09:30,282 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:09:30,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2021-11-13 18:09:30,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-13 18:09:30,504 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-13 18:09:30,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-11-13 18:09:30,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1581812392, now seen corresponding path program 1 times
[2021-11-13 18:09:30,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-13 18:09:30,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072575339]
[2021-11-13 18:09:30,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:09:30,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-13 18:09:30,515 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-11-13 18:09:30,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1596328253]
[2021-11-13 18:09:30,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:09:30,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-13 18:09:30,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/bin/uautomizer-YU5uOKAj3y/z3
[2021-11-13 18:09:30,517 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-13 18:09:30,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2021-11-13 18:09:30,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-13 18:09:30,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core
[2021-11-13 18:09:30,589 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-11-13 18:09:30,738 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked.
[2021-11-13 18:09:30,739 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2021-11-13 18:09:30,837 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked.
[2021-11-13 18:09:30,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-13 18:09:30,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072575339]
[2021-11-13 18:09:30,838 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-11-13 18:09:30,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596328253]
[2021-11-13 18:09:30,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596328253] provided 0 perfect and 2 imperfect interpolant sequences
[2021-11-13 18:09:30,838 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2021-11-13 18:09:30,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8
[2021-11-13 18:09:30,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122788775]
[2021-11-13 18:09:30,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2021-11-13 18:09:30,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2021-11-13 18:09:30,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-13 18:09:30,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2021-11-13 18:09:30,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56
[2021-11-13 18:09:30,841 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8)
[2021-11-13 18:09:30,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-13 18:09:30,972 INFO L93 Difference]: Finished difference Result 92 states and 108 transitions.
[2021-11-13 18:09:30,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states.
[2021-11-13 18:09:30,973 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 31
[2021-11-13 18:09:30,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-13 18:09:30,975 INFO L225 Difference]: With dead ends: 92
[2021-11-13 18:09:30,975 INFO L226 Difference]: Without dead ends: 79
[2021-11-13 18:09:30,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110
[2021-11-13 18:09:30,976 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 38 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 77.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.44ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 90.75ms IncrementalHoareTripleChecker+Time
[2021-11-13 18:09:30,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 118 Invalid, 68 Unknown, 0 Unchecked, 2.44ms Time], IncrementalHoareTripleChecker [12 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 90.75ms Time]
[2021-11-13 18:09:30,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states.
[2021-11-13 18:09:31,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75.
[2021-11-13 18:09:31,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 47 states have internal predecessors, (51), 21 states have call successors, (21), 9 states have call predecessors, (21), 9 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18)
[2021-11-13 18:09:31,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions.
[2021-11-13 18:09:31,021 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 31
[2021-11-13 18:09:31,021 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-11-13 18:09:31,021 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions.
[2021-11-13 18:09:31,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8)
[2021-11-13 18:09:31,021 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions.
[2021-11-13 18:09:31,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2021-11-13 18:09:31,023 INFO L506 BasicCegarLoop]: Found error trace
[2021-11-13 18:09:31,023 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:09:31,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0
[2021-11-13 18:09:31,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-13 18:09:31,224 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-13 18:09:31,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-11-13 18:09:31,224 INFO L85 PathProgramCache]: Analyzing trace with hash -857109600, now seen corresponding path program 1 times
[2021-11-13 18:09:31,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-13 18:09:31,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300190143]
[2021-11-13 18:09:31,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:09:31,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-13 18:09:31,233 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-11-13 18:09:31,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2027353648]
[2021-11-13 18:09:31,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:09:31,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-13 18:09:31,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/bin/uautomizer-YU5uOKAj3y/z3
[2021-11-13 18:09:31,234 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-13 18:09:31,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2021-11-13 18:09:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-13 18:09:31,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 15 conjunts are in the unsatisfiable core
[2021-11-13 18:09:31,299 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-11-13 18:09:31,594 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked.
[2021-11-13 18:09:31,595 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2021-11-13 18:09:31,779 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked.
[2021-11-13 18:09:31,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-13 18:09:31,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300190143]
[2021-11-13 18:09:31,779 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-11-13 18:09:31,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027353648]
[2021-11-13 18:09:31,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027353648] provided 0 perfect and 2 imperfect interpolant sequences
[2021-11-13 18:09:31,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2021-11-13 18:09:31,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8
[2021-11-13 18:09:31,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266397909]
[2021-11-13 18:09:31,780 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2021-11-13 18:09:31,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2021-11-13 18:09:31,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-13 18:09:31,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2021-11-13 18:09:31,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2021-11-13 18:09:31,784 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)
[2021-11-13 18:09:31,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-13 18:09:31,995 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions.
[2021-11-13 18:09:31,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2021-11-13 18:09:31,996 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 31
[2021-11-13 18:09:31,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-13 18:09:31,998 INFO L225 Difference]: With dead ends: 75
[2021-11-13 18:09:32,001 INFO L226 Difference]: Without dead ends: 0
[2021-11-13 18:09:32,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110
[2021-11-13 18:09:32,003 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 104.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.68ms SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 141.78ms IncrementalHoareTripleChecker+Time
[2021-11-13 18:09:32,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 68 Invalid, 112 Unknown, 0 Unchecked, 3.68ms Time], IncrementalHoareTripleChecker [34 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 141.78ms Time]
[2021-11-13 18:09:32,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2021-11-13 18:09:32,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2021-11-13 18:09:32,007 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)
[2021-11-13 18:09:32,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2021-11-13 18:09:32,008 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31
[2021-11-13 18:09:32,008 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-11-13 18:09:32,008 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2021-11-13 18:09:32,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)
[2021-11-13 18:09:32,008 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2021-11-13 18:09:32,009 INFO L282 IsEmpty]: Finished isEmpty. No accepting run.
[2021-11-13 18:09:32,011 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining)
[2021-11-13 18:09:32,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2021-11-13 18:09:32,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6
[2021-11-13 18:09:32,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.
[2021-11-13 18:09:32,442 INFO L858 garLoopResultBuilder]: For program point L33(lines 30 42) no Hoare annotation was computed.
[2021-11-13 18:09:32,442 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed.
[2021-11-13 18:09:32,442 INFO L854 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~a~0#1|))) (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 .cse0)) (= (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|) 1 .cse0) |ULTIMATE.start_main_~s~0#1|)))
[2021-11-13 18:09:32,442 INFO L854 garLoopResultBuilder]: At program point L31-1(line 31) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~a~0#1|))) (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 .cse0)) (= (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|) 1 .cse0) |ULTIMATE.start_main_~s~0#1|)))
[2021-11-13 18:09:32,443 INFO L861 garLoopResultBuilder]: At program point L48(lines 21 49) the Hoare annotation is: true
[2021-11-13 18:09:32,443 INFO L858 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed.
[2021-11-13 18:09:32,443 INFO L854 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~a~0#1|))) (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 .cse0)) (= (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|) 1 .cse0) |ULTIMATE.start_main_~s~0#1|)))
[2021-11-13 18:09:32,443 INFO L854 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~a~0#1|))) (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 .cse0)) (= (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|) 1 .cse0) |ULTIMATE.start_main_~s~0#1|)))
[2021-11-13 18:09:32,443 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed.
[2021-11-13 18:09:32,443 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed.
[2021-11-13 18:09:32,443 INFO L858 garLoopResultBuilder]: For program point L30-1(lines 30 42) no Hoare annotation was computed.
[2021-11-13 18:09:32,443 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed.
[2021-11-13 18:09:32,444 INFO L854 garLoopResultBuilder]: At program point L30-3(lines 30 42) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~a~0#1|))) (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 .cse0)) (= (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|) 1 .cse0) |ULTIMATE.start_main_~s~0#1|)))
[2021-11-13 18:09:32,444 INFO L854 garLoopResultBuilder]: At program point L30-4(lines 30 42) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~a~0#1|))) (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 .cse0)) (= (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|) 1 .cse0) |ULTIMATE.start_main_~s~0#1|)))
[2021-11-13 18:09:32,444 INFO L854 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~a~0#1|))) (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 .cse0)) (= (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|) 1 .cse0) |ULTIMATE.start_main_~s~0#1|)))
[2021-11-13 18:09:32,444 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true
[2021-11-13 18:09:32,444 INFO L858 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed.
[2021-11-13 18:09:32,444 INFO L858 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed.
[2021-11-13 18:09:32,444 INFO L858 garLoopResultBuilder]: For program point L12-2(lines 11 17) no Hoare annotation was computed.
[2021-11-13 18:09:32,445 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed.
[2021-11-13 18:09:32,445 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed.
[2021-11-13 18:09:32,448 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:09:32,452 INFO L179 ceAbstractionStarter]: Computing trace abstraction results
[2021-11-13 18:09:32,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.11 06:09:32 BoogieIcfgContainer
[2021-11-13 18:09:32,465 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2021-11-13 18:09:32,466 INFO L113 PluginConnector]: ------------------------Witness Printer----------------------------
[2021-11-13 18:09:32,466 INFO L271 PluginConnector]: Initializing Witness Printer...
[2021-11-13 18:09:32,467 INFO L275 PluginConnector]: Witness Printer initialized
[2021-11-13 18:09:32,467 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:09:28" (3/4) ...
[2021-11-13 18:09:32,470 INFO L137 WitnessPrinter]: Generating witness for correct program
[2021-11-13 18:09:32,476 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert
[2021-11-13 18:09:32,481 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges
[2021-11-13 18:09:32,481 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges
[2021-11-13 18:09:32,482 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges
[2021-11-13 18:09:32,482 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges
[2021-11-13 18:09:32,524 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/bin/uautomizer-YU5uOKAj3y/witness.graphml
[2021-11-13 18:09:32,524 INFO L132 PluginConnector]: ------------------------ END Witness Printer----------------------------
[2021-11-13 18:09:32,525 INFO L158 Benchmark]: Toolchain (without parser) took 4943.59ms. Allocated memory was 115.3MB in the beginning and 142.6MB in the end (delta: 27.3MB). Free memory was 74.3MB in the beginning and 64.0MB in the end (delta: 10.3MB). Peak memory consumption was 36.2MB. Max. memory is 16.1GB.
[2021-11-13 18:09:32,525 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 115.3MB. Free memory is still 90.3MB. There was no memory consumed. Max. memory is 16.1GB.
[2021-11-13 18:09:32,526 INFO L158 Benchmark]: CACSL2BoogieTranslator took 411.39ms. Allocated memory is still 115.3MB. Free memory was 74.1MB in the beginning and 89.5MB in the end (delta: -15.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB.
[2021-11-13 18:09:32,526 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.05ms. Allocated memory is still 115.3MB. Free memory was 89.5MB in the beginning and 88.1MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB.
[2021-11-13 18:09:32,526 INFO L158 Benchmark]: Boogie Preprocessor took 43.61ms. Allocated memory is still 115.3MB. Free memory was 88.1MB in the beginning and 87.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB.
[2021-11-13 18:09:32,527 INFO L158 Benchmark]: RCFGBuilder took 379.81ms. Allocated memory is still 115.3MB. Free memory was 87.0MB in the beginning and 77.4MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB.
[2021-11-13 18:09:32,527 INFO L158 Benchmark]: TraceAbstraction took 4003.43ms. Allocated memory was 115.3MB in the beginning and 142.6MB in the end (delta: 27.3MB). Free memory was 77.0MB in the beginning and 66.1MB in the end (delta: 10.9MB). Peak memory consumption was 38.7MB. Max. memory is 16.1GB.
[2021-11-13 18:09:32,528 INFO L158 Benchmark]: Witness Printer took 57.86ms. Allocated memory is still 142.6MB. Free memory was 66.1MB in the beginning and 64.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB.
[2021-11-13 18:09:32,530 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.29ms. Allocated memory is still 115.3MB. Free memory is still 90.3MB. There was no memory consumed. Max. memory is 16.1GB.
* CACSL2BoogieTranslator took 411.39ms. Allocated memory is still 115.3MB. Free memory was 74.1MB in the beginning and 89.5MB in the end (delta: -15.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB.
* Boogie Procedure Inliner took 39.05ms. Allocated memory is still 115.3MB. Free memory was 89.5MB in the beginning and 88.1MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB.
* Boogie Preprocessor took 43.61ms. Allocated memory is still 115.3MB. Free memory was 88.1MB in the beginning and 87.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB.
* RCFGBuilder took 379.81ms. Allocated memory is still 115.3MB. Free memory was 87.0MB in the beginning and 77.4MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB.
* TraceAbstraction took 4003.43ms. Allocated memory was 115.3MB in the beginning and 142.6MB in the end (delta: 27.3MB). Free memory was 77.0MB in the beginning and 66.1MB in the end (delta: 10.9MB). Peak memory consumption was 38.7MB. Max. memory is 16.1GB.
* Witness Printer took 57.86ms. Allocated memory is still 142.6MB. Free memory was 66.1MB in the beginning and 64.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. 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]: call to reach_error is unreachable
For all program executions holds that call to reach_error is unreachable at this location
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 2 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.9s, OverallIterations: 7, TraceHistogramMax: 5, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 82 SdHoareTripleChecker+Valid, 388.39ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 70 mSDsluCounter, 512 SdHoareTripleChecker+Invalid, 304.62ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 340 mSDsCounter, 51 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 217 IncrementalHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 51 mSolverCounterUnsat, 172 mSDtfsCounter, 217 mSolverCounterSat, 21.24ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 168 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=6, InterpolantAutomatonStates: 39, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 44 PreInvPairs, 74 NumberOfFragments, 128 HoareAnnotationTreeSize, 44 FomulaSimplifications, 93 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 791 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 116 NumberOfCodeBlocks, 116 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 169 ConstructedInterpolants, 0 QuantifiedInterpolants, 509 SizeOfPredicates, 5 NumberOfNonLiveVariables, 343 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 9 InterpolantComputations, 5 PerfectInterpolantSequences, 138/150 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: 21]: Loop Invariant
Derived loop invariant: 1
- InvariantResult [Line: 30]: Loop Invariant
Derived loop invariant: t == 1 + 2 * a && a * a + 1 + 2 * a == s
RESULT: Ultimate proved your program to be correct!
[2021-11-13 18:09:32,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1731cd6-6f1c-412f-b0f5-ea6e735944c7/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0
Received shutdown request...
--- End real Ultimate output ---
Execution finished normally
Writing output log to file Ultimate.log
Result:
TRUE