./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/loopv1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060feb6d-6a42-4881-b4dc-ec7ddf0f18f7/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060feb6d-6a42-4881-b4dc-ec7ddf0f18f7/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060feb6d-6a42-4881-b4dc-ec7ddf0f18f7/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060feb6d-6a42-4881-b4dc-ec7ddf0f18f7/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/loopv1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060feb6d-6a42-4881-b4dc-ec7ddf0f18f7/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060feb6d-6a42-4881-b4dc-ec7ddf0f18f7/bin/uautomizer-Dbtcem3rbc --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 ca45dd6499a33c329d4936fe2abf573a615c1738e62276020fbb87860c7f9abc --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:52:30,485 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:52:30,488 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:52:30,542 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:52:30,543 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:52:30,547 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:52:30,550 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:52:30,554 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:52:30,556 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:52:30,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:52:30,563 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:52:30,566 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:52:30,566 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:52:30,569 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:52:30,571 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:52:30,573 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:52:30,575 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:52:30,576 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:52:30,577 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:52:30,585 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:52:30,586 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:52:30,587 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:52:30,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:52:30,592 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:52:30,601 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:52:30,602 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:52:30,602 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:52:30,604 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:52:30,605 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:52:30,606 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:52:30,606 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:52:30,608 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:52:30,610 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:52:30,613 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:52:30,614 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:52:30,615 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:52:30,615 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:52:30,616 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:52:30,616 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:52:30,617 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:52:30,618 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:52:30,619 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060feb6d-6a42-4881-b4dc-ec7ddf0f18f7/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:52:30,659 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:52:30,659 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:52:30,660 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:52:30,660 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:52:30,661 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:52:30,661 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:52:30,662 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:52:30,662 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:52:30,662 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:52:30,663 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:52:30,664 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:52:30,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:52:30,664 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:52:30,665 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:52:30,665 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:52:30,665 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:52:30,665 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:52:30,665 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:52:30,666 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:52:30,666 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:52:30,666 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:52:30,667 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:52:30,667 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:52:30,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:52:30,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:52:30,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:52:30,669 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:52:30,670 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:52:30,670 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:52:30,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:52:30,670 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:52:30,670 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:52:30,671 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:52:30,671 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_060feb6d-6a42-4881-b4dc-ec7ddf0f18f7/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060feb6d-6a42-4881-b4dc-ec7ddf0f18f7/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca45dd6499a33c329d4936fe2abf573a615c1738e62276020fbb87860c7f9abc [2022-11-02 20:52:31,031 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:52:31,063 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:52:31,067 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:52:31,069 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:52:31,070 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:52:31,071 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060feb6d-6a42-4881-b4dc-ec7ddf0f18f7/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/loops-crafted-1/loopv1.c [2022-11-02 20:52:31,147 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060feb6d-6a42-4881-b4dc-ec7ddf0f18f7/bin/uautomizer-Dbtcem3rbc/data/2965b1dc9/9d50b1223be74b198164eec179c8df88/FLAGfbc2fc79a [2022-11-02 20:52:31,677 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:52:31,678 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060feb6d-6a42-4881-b4dc-ec7ddf0f18f7/sv-benchmarks/c/loops-crafted-1/loopv1.c [2022-11-02 20:52:31,685 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060feb6d-6a42-4881-b4dc-ec7ddf0f18f7/bin/uautomizer-Dbtcem3rbc/data/2965b1dc9/9d50b1223be74b198164eec179c8df88/FLAGfbc2fc79a [2022-11-02 20:52:32,047 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060feb6d-6a42-4881-b4dc-ec7ddf0f18f7/bin/uautomizer-Dbtcem3rbc/data/2965b1dc9/9d50b1223be74b198164eec179c8df88 [2022-11-02 20:52:32,052 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:52:32,054 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:52:32,059 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:52:32,059 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:52:32,063 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:52:32,064 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:52:32" (1/1) ... [2022-11-02 20:52:32,067 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15b17190 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:32, skipping insertion in model container [2022-11-02 20:52:32,067 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:52:32" (1/1) ... [2022-11-02 20:52:32,077 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:52:32,094 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:52:32,347 WARN L230 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_060feb6d-6a42-4881-b4dc-ec7ddf0f18f7/sv-benchmarks/c/loops-crafted-1/loopv1.c[456,469] [2022-11-02 20:52:32,365 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:52:32,373 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:52:32,385 WARN L230 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_060feb6d-6a42-4881-b4dc-ec7ddf0f18f7/sv-benchmarks/c/loops-crafted-1/loopv1.c[456,469] [2022-11-02 20:52:32,388 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:52:32,404 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:52:32,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:32 WrapperNode [2022-11-02 20:52:32,405 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:52:32,406 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:52:32,406 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:52:32,407 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:52:32,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:32" (1/1) ... [2022-11-02 20:52:32,422 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:32" (1/1) ... [2022-11-02 20:52:32,443 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 41 [2022-11-02 20:52:32,443 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:52:32,444 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:52:32,444 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:52:32,444 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:52:32,453 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:32" (1/1) ... [2022-11-02 20:52:32,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:32" (1/1) ... [2022-11-02 20:52:32,455 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:32" (1/1) ... [2022-11-02 20:52:32,455 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:32" (1/1) ... [2022-11-02 20:52:32,466 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:32" (1/1) ... [2022-11-02 20:52:32,469 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:32" (1/1) ... [2022-11-02 20:52:32,470 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:32" (1/1) ... [2022-11-02 20:52:32,471 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:32" (1/1) ... [2022-11-02 20:52:32,474 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:52:32,475 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:52:32,476 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:52:32,476 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:52:32,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:32" (1/1) ... [2022-11-02 20:52:32,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:52:32,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060feb6d-6a42-4881-b4dc-ec7ddf0f18f7/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:32,502 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060feb6d-6a42-4881-b4dc-ec7ddf0f18f7/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:52:32,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060feb6d-6a42-4881-b4dc-ec7ddf0f18f7/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:52:32,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:52:32,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:52:32,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:52:32,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:52:32,618 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:52:32,621 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:52:32,808 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:52:32,814 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:52:32,814 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 20:52:32,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:52:32 BoogieIcfgContainer [2022-11-02 20:52:32,816 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:52:32,818 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:52:32,818 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:52:32,822 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:52:32,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:52:32" (1/3) ... [2022-11-02 20:52:32,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3360e736 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:52:32, skipping insertion in model container [2022-11-02 20:52:32,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:32" (2/3) ... [2022-11-02 20:52:32,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3360e736 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:52:32, skipping insertion in model container [2022-11-02 20:52:32,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:52:32" (3/3) ... [2022-11-02 20:52:32,839 INFO L112 eAbstractionObserver]: Analyzing ICFG loopv1.c [2022-11-02 20:52:32,865 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:52:32,880 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:52:32,958 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:52:32,978 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6a42c329, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:52:32,979 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:52:32,983 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 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) [2022-11-02 20:52:33,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-02 20:52:33,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:52:33,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:33,004 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:52:33,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:33,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1807274184, now seen corresponding path program 1 times [2022-11-02 20:52:33,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:33,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557113009] [2022-11-02 20:52:33,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:33,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:33,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:33,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:33,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:52:33,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557113009] [2022-11-02 20:52:33,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557113009] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:52:33,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:52:33,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:52:33,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41415856] [2022-11-02 20:52:33,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:52:33,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:52:33,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:52:33,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:52:33,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:52:33,264 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-11-02 20:52:33,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:52:33,280 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2022-11-02 20:52:33,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:52:33,282 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-02 20:52:33,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:52:33,292 INFO L225 Difference]: With dead ends: 21 [2022-11-02 20:52:33,292 INFO L226 Difference]: Without dead ends: 9 [2022-11-02 20:52:33,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:52:33,304 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:52:33,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:52:33,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-02 20:52:33,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-11-02 20:52:33,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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) [2022-11-02 20:52:33,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2022-11-02 20:52:33,342 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2022-11-02 20:52:33,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:52:33,342 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2022-11-02 20:52:33,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-11-02 20:52:33,344 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2022-11-02 20:52:33,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-02 20:52:33,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:52:33,345 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:33,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:52:33,345 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:52:33,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:33,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1806976274, now seen corresponding path program 1 times [2022-11-02 20:52:33,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:33,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546006379] [2022-11-02 20:52:33,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:33,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:33,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:33,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:33,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:52:33,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546006379] [2022-11-02 20:52:33,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546006379] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:52:33,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:52:33,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:52:33,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933841424] [2022-11-02 20:52:33,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:52:33,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:52:33,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:52:33,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:52:33,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:52:33,620 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-11-02 20:52:33,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:52:33,672 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2022-11-02 20:52:33,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:52:33,673 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-02 20:52:33,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:52:33,675 INFO L225 Difference]: With dead ends: 15 [2022-11-02 20:52:33,675 INFO L226 Difference]: Without dead ends: 11 [2022-11-02 20:52:33,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:52:33,677 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:52:33,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 12 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:52:33,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-02 20:52:33,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2022-11-02 20:52:33,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:33,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-11-02 20:52:33,682 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2022-11-02 20:52:33,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:52:33,682 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-11-02 20:52:33,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-11-02 20:52:33,683 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-11-02 20:52:33,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-02 20:52:33,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:52:33,683 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:33,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:52:33,684 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:52:33,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:33,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1387754645, now seen corresponding path program 1 times [2022-11-02 20:52:33,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:33,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783902747] [2022-11-02 20:52:33,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:33,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:33,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:34,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:34,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:52:34,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783902747] [2022-11-02 20:52:34,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783902747] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:52:34,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231743680] [2022-11-02 20:52:34,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:34,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:52:34,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060feb6d-6a42-4881-b4dc-ec7ddf0f18f7/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:34,030 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060feb6d-6a42-4881-b4dc-ec7ddf0f18f7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:52:34,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060feb6d-6a42-4881-b4dc-ec7ddf0f18f7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:52:34,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:34,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:52:34,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:52:34,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:34,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:52:34,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:52:34,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231743680] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 20:52:34,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:52:34,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2022-11-02 20:52:34,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534157447] [2022-11-02 20:52:34,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:52:34,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:52:34,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:52:34,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:52:34,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:52:34,395 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2022-11-02 20:52:34,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:52:34,422 INFO L93 Difference]: Finished difference Result 10 states and 11 transitions. [2022-11-02 20:52:34,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:52:34,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-02 20:52:34,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:52:34,423 INFO L225 Difference]: With dead ends: 10 [2022-11-02 20:52:34,423 INFO L226 Difference]: Without dead ends: 0 [2022-11-02 20:52:34,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:52:34,425 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:52:34,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 7 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:52:34,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-02 20:52:34,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-02 20:52:34,427 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) [2022-11-02 20:52:34,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-02 20:52:34,427 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2022-11-02 20:52:34,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:52:34,428 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-02 20:52:34,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2022-11-02 20:52:34,428 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-02 20:52:34,428 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-02 20:52:34,431 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-02 20:52:34,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060feb6d-6a42-4881-b4dc-ec7ddf0f18f7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-02 20:52:34,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060feb6d-6a42-4881-b4dc-ec7ddf0f18f7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:52:34,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-02 20:52:34,661 INFO L902 garLoopResultBuilder]: At program point L33(lines 20 34) the Hoare annotation is: true [2022-11-02 20:52:34,661 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-02 20:52:34,662 INFO L899 garLoopResultBuilder]: For program point L27(lines 27 30) no Hoare annotation was computed. [2022-11-02 20:52:34,662 INFO L895 garLoopResultBuilder]: At program point L27-2(lines 25 31) the Hoare annotation is: (= (mod |ULTIMATE.start_main_~i~0#1| 3) 0) [2022-11-02 20:52:34,662 INFO L899 garLoopResultBuilder]: For program point L23(line 23) no Hoare annotation was computed. [2022-11-02 20:52:34,662 INFO L899 garLoopResultBuilder]: For program point L25-2(lines 25 31) no Hoare annotation was computed. [2022-11-02 20:52:34,663 INFO L899 garLoopResultBuilder]: For program point L13(lines 13 15) no Hoare annotation was computed. [2022-11-02 20:52:34,663 INFO L902 garLoopResultBuilder]: At program point L13-2(lines 12 17) the Hoare annotation is: true [2022-11-02 20:52:34,663 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-11-02 20:52:34,663 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-02 20:52:34,663 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-11-02 20:52:34,664 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2022-11-02 20:52:34,664 INFO L899 garLoopResultBuilder]: For program point L14(line 14) no Hoare annotation was computed. [2022-11-02 20:52:34,667 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-02 20:52:34,669 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-02 20:52:34,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.11 08:52:34 BoogieIcfgContainer [2022-11-02 20:52:34,683 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-02 20:52:34,684 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-02 20:52:34,684 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-02 20:52:34,684 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-02 20:52:34,685 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:52:32" (3/4) ... [2022-11-02 20:52:34,688 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-02 20:52:34,697 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2022-11-02 20:52:34,697 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-11-02 20:52:34,698 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-02 20:52:34,698 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-02 20:52:34,730 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060feb6d-6a42-4881-b4dc-ec7ddf0f18f7/bin/uautomizer-Dbtcem3rbc/witness.graphml [2022-11-02 20:52:34,731 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-02 20:52:34,731 INFO L158 Benchmark]: Toolchain (without parser) took 2677.01ms. Allocated memory was 115.3MB in the beginning and 140.5MB in the end (delta: 25.2MB). Free memory was 75.4MB in the beginning and 76.1MB in the end (delta: -673.9kB). Peak memory consumption was 23.7MB. Max. memory is 16.1GB. [2022-11-02 20:52:34,732 INFO L158 Benchmark]: CDTParser took 0.96ms. Allocated memory is still 115.3MB. Free memory is still 91.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 20:52:34,732 INFO L158 Benchmark]: CACSL2BoogieTranslator took 346.52ms. Allocated memory is still 115.3MB. Free memory was 75.3MB in the beginning and 89.1MB in the end (delta: -13.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-02 20:52:34,733 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.25ms. Allocated memory is still 115.3MB. Free memory was 89.1MB in the beginning and 87.7MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 20:52:34,733 INFO L158 Benchmark]: Boogie Preprocessor took 30.53ms. Allocated memory is still 115.3MB. Free memory was 87.7MB in the beginning and 86.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-02 20:52:34,734 INFO L158 Benchmark]: RCFGBuilder took 341.04ms. Allocated memory is still 115.3MB. Free memory was 86.6MB in the beginning and 77.1MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-02 20:52:34,735 INFO L158 Benchmark]: TraceAbstraction took 1865.11ms. Allocated memory was 115.3MB in the beginning and 140.5MB in the end (delta: 25.2MB). Free memory was 76.5MB in the beginning and 79.3MB in the end (delta: -2.8MB). Peak memory consumption was 24.1MB. Max. memory is 16.1GB. [2022-11-02 20:52:34,735 INFO L158 Benchmark]: Witness Printer took 47.03ms. Allocated memory is still 140.5MB. Free memory was 78.2MB in the beginning and 76.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-02 20:52:34,737 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.96ms. Allocated memory is still 115.3MB. Free memory is still 91.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 346.52ms. Allocated memory is still 115.3MB. Free memory was 75.3MB in the beginning and 89.1MB in the end (delta: -13.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.25ms. Allocated memory is still 115.3MB. Free memory was 89.1MB in the beginning and 87.7MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 30.53ms. Allocated memory is still 115.3MB. Free memory was 87.7MB in the beginning and 86.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 341.04ms. Allocated memory is still 115.3MB. Free memory was 86.6MB in the beginning and 77.1MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 1865.11ms. Allocated memory was 115.3MB in the beginning and 140.5MB in the end (delta: 25.2MB). Free memory was 76.5MB in the beginning and 79.3MB in the end (delta: -2.8MB). Peak memory consumption was 24.1MB. Max. memory is 16.1GB. * Witness Printer took 47.03ms. Allocated memory is still 140.5MB. Free memory was 78.2MB in the beginning and 76.1MB 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 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.7s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3 mSDsluCounter, 34 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 11 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 27 IncrementalHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 23 mSDtfsCounter, 27 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, InterpolantAutomatonStates: 10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 6 NumberOfFragments, 7 HoareAnnotationTreeSize, 3 FomulaSimplifications, 10 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 32 NumberOfCodeBlocks, 32 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 98 SizeOfPredicates, 2 NumberOfNonLiveVariables, 48 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 1/3 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: 12]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: i % 3 == 0 RESULT: Ultimate proved your program to be correct! [2022-11-02 20:52:34,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_060feb6d-6a42-4881-b4dc-ec7ddf0f18f7/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE